In arteries class of blood vessel does blood pressure refer to the pressure that blood exerts against them
Blood pressure is the force of your blood against the artery walls. Blood is transported from your heart to different regions of your body through arteries. Throughout the day, your blood pressure typically increases and decreases.
The main blood vessel supplying the muscles in your upper arm and elbow joint is called the brachial artery. It's frequently used to check blood pressure. Because the brachial artery is located close to the skin's surface, violent traumas like arm fractures might harm it.
Blood pressure is also influenced by arterial wall thickness and flexibility. The arteries experience pressure every time the heart contracts and relaxes. When blood is being pushed from the heart into the arteries, the pressure is at its highest.
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PLSSS HELP IF YOU TURLY KNOW THISS
Answer:
C some plants
Explanation:
Cyclorana platycephala is a frog that is found in Australia. Like all frogs, it needs to keep its skin moist. During periods of drought it digs a chamber in the ground and lines it with mucous, which hardens and seals the chamber from water loss. The frog settles into the chamber, its metabolism slows down, and it becomes inactive. The frog can survive in this state for up to five years. Describe how this trait will determine the types of biome that the frog might live in.
These traits will make the frog live in harsh conditions in its different biomes.
The species, Cyclorana platycephala, has moist skin to undergo cutaneous respiration. It can dig underground chambers and line the chamber with mucous to avoid water loss. This is important to avoid severe conditions of drought when water is scarce.
The frog's ability to slow down its metabolism is also a brilliant feature to avoid harsh conditions of food and water unavailability. These traits allow the frog to survive in conditions that are impossible for other organisms to live in.
What is Cutaneous respiration?
Cutaneous respiration, also known as cutaneous gas exchange, is a type of breathing in which an organism's skin or outside integument serves as the site of gas exchange rather than its gills or lungs. Cutaneous respiration may be used in conjunction with other methods of gas exchange, such as ventilation, or it may function alone.
Therefore, these traits help the frog to live in severe environmental conditions.
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during mendel's first set of experiments, all the plants F1 offspring expressed the same version of the studied trait. Which of the following best describes these experiments
During Mendel's first set of experiments, all the plant's F1 offspring expressed the same version of the studied trait because Mendel crossed true-breeding plants with different versions of a studied trait (Option D).
What are true breeding plants?True breeding plants are plants that when they are crossed can produce all progeny with the same trait because they are homozygous. In this case, Mendel crossed true-breeding plants which were dominant homozygous or recessive homozygous, thereby obtaining all heterozygous offspring.
Therefore, with this data, we can see that true breeding plants are homozygous for a given trait, which may be dominant or recessive and therefore the cross of true breeding plants always produce plants with the same phenotype of one of the parental lines.
Complete question:
During Mendel's first set of experiments, all the plants F, offspring expressed the same version of the studied trait. Which of the following best describes these experiments? A. Mendel observed crosses that took place naturally in his gardens.
B. Mendel crossed plants that all expressed the same version of a studied trait.
C. Mendel allowed true-breeding plants to self-pollinate.
D. Mendel crossed true-breeding plants with different versions of a studied trait.
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Describe the phase change of the ice if it were to be left sitting out.
The phase change that occurs when the ice is left sitting out will be melting that causes solid to turn into liquid.
Melting is the phenomenon in chemistry where a solid substance is converted into liquid. This change happens due to the difference in the temperature requirement. For a substance to be solid, the temperature must be low while it should be high for liquid phase.
Solid are those substances that have strong intermolecular forces and their molecules lie very closely packed in a definite shape. Thus, solid substances have a definite shape and volume. The kinetic energy pf solids is quite less.
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in a certain species of diploid fish a single gene controls skin color. researchers have found four different alleles of this gene within the fish population. how many different gamete genotypes are possible in an individual of this species?
There are two gamete genotypes that are possible in an individual of this species.
One copy of each pair of chromosomes comes from the individual's mother and the other copy from the individual's father. Since we have two copies of each chromosome, he has two copies of each gene. According to Mendel's law of segregation, a diploid organism passes randomly selected alleles for a trait to offspring, so the offspring receives one allele of her from each parent.
Individuals and all diploid organisms can only have two alleles for a given gene, but multiple alleles can exist at the population level, and within populations, Different individuals can have different pairs of these alleles. If two alleles are the same, the individual is homozygous for that allele. If the alleles are different, the individual is heterozygous.
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during photosynthesis, light energy is converted into energy stored in _____ in molecules
Answer: Chloroplasts
What contribution did Thompson add to the understanding of the atom?
a
Discovered that electrons orbit the nucleus. B
Discovered the nucleus of the atom using the Gold Foil experiment
c
Reasoned that atoms are indivisible. D
Discovered a subatomic particle (protons or, neutrons or , electrons)
The contribution that thompson did add to the understanding of the atom was that he Discovered that electrons orbit the nucleus.That is option A.
What is an atom?An atom is defined as the smallest indivisible part of an element that is made up of central nucleus with electrons that revolves round about it.
There are various scientist that contributed towards the study and understanding of atoms and they include the following:
Democritus, John Dalton, J.J. Thomson, Ernest Rutherford, Niels Bohr, Robert Millikan and Irwin Schrodinger.Joseph John Thompson or J.J. Thomson in 1879 proposed the existence of electrons that revolves round the nucleus of an atom.
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Fluoroacetate occurs naturally in some plants and is highly toxic to mammals and insects. In cells, it is converted to fluorocitrate, which binds tightly and inhibits an enzyme crucial for cellular respiration, causing citrate buildup. To what enzyme does fluorocitrate bind?.
It is changed into fluorocitrate inside of cells. which forms citrate due to its strong binding and inhibition of an enzyme necessary for cellular respiration.
Citrate synthase changes fluoroacetate into fluorocitrate after oral dosing and intestinal absorption.
Because fluoroacetate is chemically identical to acetate, which plays a crucial function in cellular metabolism, it is extremely poisonous to mammals and insects.
By blocking the Krebs cycle, fluoroacetate has hazardous effects (after being converted to fluorocitrate). Fluoroacetyl coenzyme A, which condenses with oxaloacetate to generate fluorocitrate, incorporates the chemical.
"Trojan horse inhibitor" has been used to describe fluoroacetate. It enters the citric acid cycle and is changed by the enzyme acetyl-CoA-synthetase into fluoroacetyl-CoA, which is then changed into fluorocitrate by the enzyme citrate synthase. Before it interacts with aconitase and stops the citric acid cycle, it is not inhibitory.
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an individual who is heterozygous for an autosomal dominant condition has a child with an individual who does not have the autosomal dominant condition. what is the percent chance that their child will have the disease? (enter a whole number, not a decimal or fraction.)
The percentage of their child having the disease will be 50%.
An autosomal dominant condition means that the disease will still occur in the individual if he is heterozygous for the trait. The punnet square between a heterozygous autosomal dominant parent and autosomal recessive parent will be made to check for the chances in their offspring to carry that condition:
a a
A Aa Aa
a aa aa
The alleles for the heterozygous autosomal dominant parent are Aa and those for the autosomal recessive parent of the condition are aa.
The results show that there are 50% chance that the children will be heterozygous autosomal dominant for the trait.
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chloroplasts move protons from to build a proton gradient group of answer choices the stroma to the cytosol. the intermembrane space to the matrix. the matrix to the stroma. the stroma to the inner thylakoid space. the inner thylakoid space to the stroma.
Chloroplast moves protons from the stroma to the inner Thylakoid space to build a proton gradient.
The chloroplast function is fundamentally dependent on proton gradients. The light-induced -proton gradient is necessary for ATP synthesis across thylakoid membranes.
In the chloroplast stroma, plant photosynthesis generates reduced power. Protons are transported from the stroma into the thylakoid lumen during this process, resulting in the transmission of a proton motive force (pmf) across the thylakoid membrane.
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how is muscle contraction stimulated by calcium ions? i. calcium ions are released from the sarcoplasmic reticulum and bind to myosin, stimulating atpase activity. ii. none of the other options. iii. calcium ions are released from the sarcoplasmic reticulum and bind to tropomyosin, stimulating its atpase activity. iv. calcium ions are released from the sarcoplasmic reticulum and bind to troponin c, promoting the binding of myosin to actin. v. calcium ions are released from the sarcoplasmic reticulum and bind to actin, promoting its binding to myosin.
Myosin and actin filaments of the muscle fibrils glide into one another as a result of calcium diffusing in the cytoplasm, resulting in the contraction of the complete muscle fiber.
How is muscle contraction stimulated by calcium ions?Myosin and actin filaments of the muscle fibrils glide into one another as a result of calcium diffusing in the cytoplasm, resulting in the contraction of the complete muscle fiber.
When the membrane of the T-tubular system is activated, calcium is released from the sarcoplasmic reticulum through calcium ion channels. As a result of its binding to Troponin C, which causes it to conform, the myosin head is able to cling to the actin filament, resulting in the contraction of the muscle.
In addition to facilitating mobility, muscle contraction even contributes to the body's posture, joint stability, and heat production. Muscle contraction exists responsible for maintaining posture, such as standing and sitting.
Therefore, the correct answer is option ii. none of the other options.
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Why are enzymes so important in metabolic reactions?
Answer:
Explanation:
Enzymes are proteins that help speed up metabolism, or the chemical reactions in our bodies. They build some substances and break others down. All living things have enzymes.
the phenomenon that causes a single ancestral species to evolve into a wide array of descendant species with diverse habitats, forms, or behaviors that occurs often as a result of colonization of a new area is known as
Adaptive radiation is the process through which organisms rapidly diverge from a single ancestral species into a variety of novel forms, especially when a change in the environment opens up new resources.
What kinds of circumstances can result in adaptive radiation?A species develops in a setting with few other species and abundant resources, such as islands created by volcanic activity and the eventual colonization of those islands.
How does allopatric speciation work?When a species divides into two distinct groups that are isolated from one another, allopatric speciation.
(1) Takes place. They can't breed with one another because of a physical barrier, such a mountain range or a waterway.
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Hey guys facing a bit of difficulties on these 5 questions, could someone help? That'd be appreciated thanks.
Answer:
accumulation is the answer
with sexual reproduction,: many single-celled eukaryotic organisms have evolved complex life cycles that include sexual reproduction. with sexual reproduction,: diploid cells must undergo mitotic cell division in order to reproduce. haploid cells must undergo meiotic divisions to form gametes. genetic material from two haploid cells is combined. all of these choices are accurate.
According to the given statement at some point, two cells must fuse to become diploid.
The correct option is A.
What is diploid cell?Human somatic cells are diploid, meaning they have 46 chromosomes, 22 pairs of autosomes, as well as a pair of y chromosome. A pair of chromosomes is one that has each chromosome has two copies.
Where are diploid cells?Most eukaryotes have a diploid chromosomal set in somatic cells, or non-sex cells. These cells hold the organism's full genetic information, or chromosomes, or double the number of haploid chromosomes. As just a result, every cell in an organism contains every gene present in that organism.
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The complete question is -
Many single-celled eukaryotic organisms have evolved complex life cycles that include sexual reproduction. This means that:
A- at some point, two cells must fuse to become diploid.
B- diploid cells must undergo mitotic cell division in order to reproduce.
C- haploid cells must undergo meiotic divisions to form gametes.
D- complex mating behaviors likely evolved at the same time as sexual reproduction.
methotrexate is a drug that can inhibit cell division by preventing the synthesis of purine bases. cells treated with methotrexate arrest at a particular stage of the cell cycle. q5.12 points during which stage of the cell cycle would you expect cells treated with methotrexate to arrest? briefly explain your reasoning in 1-2 sentences.
Methotrexate arrest cells at the late S-phase of the cell cycle.
Since methotrexate arrests cells in the late S-phase of the cell-progressive cycle, which is when DNA synthesis is occurring and they exhibit no discernible increase in DNA content, and no M-phase occurs, the outcomes of the methotrexate treatment may be more comparable to those shown for other treatments.
These traits may be seen in the graph of the cells treated with medication A, where a rise in x indicates that DNA synthesis is occurring while a drop in 2 indicates that no M-phase, or mitotic phase, is occurring.
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pLS help me it's due tomorrow!
Hemostasis is your body’s normal reaction to an injury that causes bleeding.
What is hemostasis?Your body's natural response to an injury that results in bleeding is hemostasis. This response stops the bleeding, allowing your body to begin healing the wound. You must have this talent to survive, especially if you have severe wounds. However, the mechanisms that regulate hemostasis can occasionally break down, leading to potentially serious or even dangerous issues with bleeding or clotting.Primary hemostasis and secondary hemostasis are the two components of hemostasis. Unstable hemostatic platelet plug development results from primary hemostasis employing vascular endothelial cells and platelets. In secondary hemostasis, activation of the coagulation cascade leads to the creation of a stable fibrin clot. Hemostasis generally results in the injury site's bleeding ceasing. To prevent blood clots from forming at the site of an injury, natural anticoagulants are required. After the healing process, the blood clot must be removed in order to restore blood flow. One of the key elements needed to remove a clot is the fibrinolysis system. To guarantee an efficient response to vascular injury that is restricted to the injured spot, procoagulant and anticoagulant components interacted intricately.Therefore, your body's natural response to an injury that results in bleeding is hemostasis.
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13. In which sphere does carbon build up for millions of years in the form of coal?
a. Atmosphere
b. Mega sphere
c. Hydrosphere
d. Geosphere
Answer:
d. Geosphere
the carbon enters the geosphere (Earth) through the biosphere by means of decaying dead organic plant and animal materials undergoing fossilization there by becoming incorporated in organic rich oil and gas (fossil fuels)
bill, age 50, is depressed and suffers from headaches, joint pain, and fatigue. he is referred to an endocrinologist who orders tests that indicate bill has an enlarged heart and overproduction of growth hormone. the endocrinologist also notes bill has enlarged bones, especially his facial bones, hands, and feet. the most likely diagnosis for 50-year-old bill is .
Osteoporosis makes bones weak and brittle, so fragile that even minor stressors like coughing or bending over can break them. Hip, wrist, and spine fractures brought on by osteoporosis are the most frequent.
What is Osteoporosis?Bone is a living tissue that constantly degrades and is replaced. Osteoporosis is a condition which is seen in females and sometimes in males.
Osteoporosis can affect people of all races. It is usually occurs due to calcium deficiency but menopause is also one of the reason for this. A lots of bone loss takes place. Apart from it lots of leg pain and back pain happens.
Back pain from a shattered or compressed vertebrae is one of the signs, as is gradual height loss.
Therefore, Osteoporosis makes bones weak and brittle, so fragile that even minor stressors like coughing or bending over can break them. Hip, wrist, and spine fractures brought on by osteoporosis are the most frequent.
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Give a detailed overview of your topic including their origin story (Hyperion greek mythology)
Hyperion was one of the twelve Titan kids of Gaia (Earth) and Uranus in Greek mythology (the Sky). Helios (the Sun), Selene (the Moon), and Eos are the products of Hyperion and his sister, the Titaness Theia (the Dawn).
Where does Greek mythology come from?Greek creation legend. The Ancient Greeks held the view that the world was initially in a state of chaos, or complete emptiness. Gaia (Mother Earth), Uranus (the sky), and other ancient gods (known as primordials), including Pontus, appeared out of thin air (the primordial god of the oceans).
Hyperion assisted his siblings in overthrowing their father, Uranus, and later rose to become one of the Titan pillars, notably the East pillar, which supports the sky in the universe. He is also credited with establishing the sun and moon cycles for his offspring.
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a researcher discovers a new species of fungus that forms hyphae, but not septa. this fungus also lacks multicellular fruiting bodies and does not appear to form either endomycorrhizae or ectomycorrhizae with plants. how should this fungus be classified?
This fungus should be classified as a zygomycete.
As eukaryotic creatures, fungus has membranes-bound organelles and distinct nuclei in each of their cells. Fungi have been separated from plants because they lack chlorophyll and differ from plants in terms of specific structural and physiological characteristics, such as cell wall and cell membrane components. Historically, fungi were considered to be part of the plant kingdom. Additionally, the main ways that fungus develop vegetatively and consume nutrients clearly distinguish them from all other living things, including animals. Fungi develop from the tips of the filaments (hyphae) that form the bodies of the organisms (mycelia), and they outwardly decompose organic materials before incorporating it into their mycelia.
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after experimenting with the effects of ph on enzymes, would you suspect that human blood has a constant ph? why? what would be the adaptive advantage of this?
Human blood has a constant pH so as to ensure that other enzymes and protein present in it are not denatured and the adaptive advantage of this is the ability to eat or ingest substances of any pH.
What is pH?This is referred to as power of hydrogen and is also the degree of acidity or alkalinity if a substance. Enzymes on the other hand are biological catalyst which speeds up the rate of a reaction and is done by lowering the activation energy.
Enzymes are proteinous and can be denatured by high temperature and a pH which is in its extreme value. The pH of blood is constant as a result of the lungs and kidneys regulating it. This is important as it ensures that metabolic processes aren't hindered and ingesting any edible substance won't be a problem.
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the ld50 indicates the . a. lowest dose that kills any member of the population b. amount of toxicant it takes to kill half the population c. lowest dose that kills 50 out of 1000 members of the population d. lowest dose required to cure half of the population
(b) "amount of toxicant it takes to kill half the population" is what the ld50 indicates.
The median lethal dose, also known as LD50 (short for "lethal dosage, 50%"), LC50 (short for "lethal concentration, 50%") or LCt50, is a hazardous measurement that calculates the deadly dose of a disease, toxin, or radiation.
The dose necessary to cause the death of 50% of a population under test after a predetermined test period is known as the LD50 value for a drug. Commonly used as a broad indicator of a substance's acute toxicity are LD50 values.
Greater toxicity is indicated by a lower LD50. It shows how much poisonous substance is required to eliminate half the population.
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3. can you think of any similarities between whales and the oil plumes where the oceanospirillales bacteria were found? (hint: why were whales once hunted in great numbers? what was their fat used for?) why might oceanospirillales bacteria be symbionts of osedax? 8pts
At 1,017 m or Osedax Monterey Bay sp. 3 "rosy" Osedax sp. MB3 and 381 m (Osedax Monterey Bay sp. 4 "yellow collar") depths, we looked into the genetic diversity of symbiotic bacteria associated with two newly discovered species of Osedax from Monterey Canyon, California.
Comparing adult Osedax frank press and juvenile Osedax frank press that had recently colonized whalebones implanted at 2,891 m allowed for the identification of differences in the compositions and abundances of the bacteria associated with the newly discovered host species through the use of quantitative PCR and clone libraries of 16S rRNA gene sequences.
Oceanospirillales symbionts connected to Gammaproteobacteria associated with the previously described O. frank press and Osedax rubiplumus were present in the newly discovered Osedax species.
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a herd of 55 cows eat 3250 pounds of silage daily . if the herd size increases to 80 cows how much more will be needed daily ?
Answer:
1,475 lbs.
Explanation:
Divide the current amount of silage eaten by the current amount of cows to find how much food one cow eats:
3250 ÷ 55 = 59
Then, subtract the current herd size from the new herd size to find how many new cows will be added to the herd:
80 - 55 = 25
Now, multiply the amount of new cows by the amount of silage eaten per cow:
25 * 59 = 1,475
There will need to be 1,475 more pounds of silage daily.
one consequence of widespread use of -spectrum antibiotics is the development of resistance in microbes that are part of the normal biota. multiple choice question. narrow; pathogenic
The consequence of widespread use of antibiotics in the development of resistance in microbes that are part of the normal biota is pathogenic.
The correct answer choice is option b.
Why pathogens occur in the use of antibioticsWhen a resistance of antibiotics spectrum is mis-administered, or given in its overdose, number of pathogenic bacteria that are resistant to antibiotics will increase; thereby making infections or diseases caused by bacteria be incurable. In order words, it makes it very difficult to treat the health condition when this happens.
Antibiotics are drugs, medicines or injections used in the treatment of bacteria infections. There are countless number of health conditions which are as a result of bacteria that are pathogenic.
So therefore, it can be deduced from the explanation given in the task above about the consequence of widespread use of spectrum antibiotics that it makes treatable illness become difficult to treat.
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which single use container uses up the fewest resources from the enviorement
Answer:
Paper cupExplanation:
Paper cup is made from pulp which is obtained from wood.
Paper is usually very light with a low durability
it decomposes much more quickly than plastic and glass.
and it is less likely to be a source of pollution and don’t really pose a risk to wildlife.
Therefore, paper cups arere single use cups uses up the fewest resources from the environment. A paper cup uses up the most resources from the environment if used just once. HOPE THIS HELPS!
I need some help with my science homework.
Answer: Photosynthesis changes carbon dioxide and water into oxygen and glucose, while Cellular respiration does the opposite converting glucose and oxygen into water and Carbon dioxide
why do boy act weird
A male child acts weird when he is not comfortable with things happening around him which could be as a result of depression, embarrassment, uneaseness or even rejection.
How a boy act weirdThere are countless ways which can make an individual behave strangely in his environment. When the situation of happenings take a particular pattern which does not make one good, the act of weirdness set in. This term "weirdness" can be described in several ways to explain the various reaction which is seen in an individual.
However, in another context, the weirdness of a person may be inform of showcasing or demonstrating certain personalities or characters which is not common among others.
In addition, the weirdness of boy could set in when he likes the other gender and lacks certain ways or approaches to make his intentions known.
In conclusion, we can therefore confirm with the explanation given from above that a boy act weird as a result of unusual circumstances around him.
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If a rock contains ten different kinds of fossils, which of the following must be true?
answer: All of the organisms had to be alive when the rock was deposited
The statement regarding a rock with ten distinct types of fossils that is true: 'All of the organisms must have been alive at the time of rock deposition'.
The question is incomplete. The complete question is:-
If a rock consists of ten distinct types of fossils, which of the following statements regarding the rock might be true?
Hints:-
'All the ten organisms witnessed evolution at the similar time'.
'All the ten organisms had gone extinct at the similar period of time'.
'All of the fossils are helpful in order to constrain the relative age'.
'All of the organisms must have been alive at the time of rock deposition'.
'These organisms relate to the minimum age of the rock'.
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