Some molecules are too large to pass through the cell membrane without the assistance of a protein channel. The process of molecules traveling along their concentration gradient through protein channels is called facilitated diffusion.
The process of spontaneous passive movement of molecules or ions across a biological membrane by particular transmembrane integral proteins is known as facilitated diffusion.
A form of passive transport is facilitated transport. In contrast to simple diffusion, where substances flow across a membrane without the aid of membrane proteins, substances diffuse across the plasma membrane with the aid of membrane proteins in assisted transport, also known as facilitated diffusion.
Facilitated diffusion is significant because it controls what enters and exits the cell. The cellular component that controls the selective transport of chemicals is the plasma membrane. Facilitated diffusion is illustrated by the movement of amino acids and glucose into cells from the circulation. These molecules are ingested through active transport in the small intestine and then released into circulation.
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Volume entering the small intestine: 9,500 mL Volume entering the large intestine: 580 mL Volume leaving the large intestine: 200 mL What percentage of the water entering the small intestine is absorbed by the small intestine?
the anwer is 28 i had this exact question on my book
Arrange these statements into the most appropriate order, reflecting what happens following initiation of the Valsalva maneuver:
1. Decrease in venous return lowers left ventricular stroke volume and arterial blood pressure.
2. Initial increase in left ventricular stroke volume raises systemic blood pressure.
3. Initial increase in left ventricular volume results in increase in left ventricular stroke volume. 4. Intrathoracic pressure is raised by expiring against a closed glottis.
5. Raised intrathoracic pressure decreases venous return to the right atrium from the systemic circulation.
6. Raised intrathoracic pressure initially increases venous return to the left atrium from the lungs. 7. Raised systemic blood pressure reflexively decreases heart rate.
8. This results in peripheral vasoconstriction and increasing heart rate.
1. When Valsalva maneuvre is done, then intrathoracic pressure is increased as the expiration is done forcibly against the closed glottis.
2. Raised intrathoracic pressure compresses the lungs and blood to left atrium is increased. Left atrium sends this blood to the left ventricle.
3. When blood is increased in left ventricle, it will contract more efficiently causing more stroke volume and cardiac output.
4. More cardiac output increases the systolic blood pressure.
5. Intrathoracic pressure is increased which further compresses the vena cava and venous return to right atrium is decreased.
6. Decrease in venous return means less blood will go to the left ventricle. Left preload causes less contraction and stroke volume is reduced. Cardiac output reduces.
7. To compensate for decreased cardiac output, the vessels undergo vasoconstriction and the heart rate is also increased.
8. The raised systolic blood pressure reflexively decrease the raised heart rate and heart rate becomes Normal.
Intrathoracic pressure influences venous go back and therefore cardiac output and arterial pressure. Inspiration drops intrathoracic stress, dilates the thoracic vena cava, and acutely decreases atrial filling. Cardiac output falls, and therefore arterial stress falls.
High quality-pressure air flow increases intrathoracic stress. when you consider that diaphragmatic descent will increase intra-belly strain, the decrease inside the strain gradient for venous return is much less than would in any other case occur if the only exchange have been an boom in proper atrial stress.
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Suppose you were working in a department store. What unit of measurement (meter, centimeter, millimeter) would you use to measure the length and width of shoes and window curtains?
The unit of measurement which would be most likely used to measure the length and width of shoes and window curtains is referred to as centimeter.
What is Measurement?Measurement is commonly used and it is used to determine how big or small an object or body is and can be measured using various units depending on the parameter involved.
Measurement of the length and width of shoes and window curtains involves the use of tape rule which has standard readings for inches and centimeters and the objects involved aren't too small or too big in terms of their various sizes. Centimeter as a unit also is in the medium form which makes an easy match.
This is therefore the reason why centimeter will be most likely used so as to get more accurate readings and results and is therefore the most appropriate choice.
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Humans have an omnivorous diet. Suggest how the human digestive system is adapted
to break down the different types of food that humans eat.
Human beings are omnivores.
The term "omnivores" refers to generalized feeding i.e., they can consume both plants and meat. They have specialized adaptations for gathering, eating, and processing food that contains both plant protein and animal protein. McArdle goes on to say that omnivores are primarily "opportunistic" feeders that take advantage of food opportunities in order to survive. They exhibit more universal physiological and anatomical characteristics. One such feature is the human dentition (set of teeth). It proves that the human diet is by nature omnivorous and not herbivorous given the presence of canine teeth for tearing flesh and molars for grinding and chewing. Our digestive system is shorter than that of a herbivore and longer than that of a carnivorous animal. A characteristic of omnivores is this. Vegetation requires a longer digestive system as that of herbivores to be fully digest than plant based diet. Meat is however, easily broken down. Nevertheless, consuming animal protein is not necessary for humans. It's up to you what you do.Hence, human dentition and length of the digestive tract are examples that suggest that humans are adapted to have an omnivorous diet.
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What new information do you feel like you missed? If you are having trouble recalling reread to clarify. The Big Bang theory.
The information about the big bang theory is everything in the cosmos was compressed into a singularity, a point of infinite heat and density, around 13.7 billion years ago. Our cosmos suddenly began to expand explosively, expanding faster than the speed of light.
According to the Big Bang theory, the Universe's present and past matter both originated at the same moment, around 13.8 billion years ago. At this point, all matter had been gathered into a singularity, which was a tiny small ball with infinite density and extreme heat.
Never was The Big Bang Theory canceled. Jim Parsons' unwillingness to extend his $50 million deal for seasons 13 and 14 had a significant impact on the choice. He loved playing Sheldon Cooper, but soon he became tired of it and was afraid of what life had in store for him outside of the sitcom.
The Big Bang theory's basic tenet is that the cosmos began at a single location some 13.8 billion years ago. Georges Lemaitre put forth the Big Bang idea in 1927. Georges referred to it as the hypothesis of the primordial atom rather than the Big Bang idea.
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Many neurons have only a single axon, but many terminals at the end of the axon.How does this end structure of the axon support its function
Answer:
How does this end structure of the axon support its function? A single axon means that a neuron can only send one signal at a time (one electrical impulse down the length of the axon). However, since the axon has multiple terminals it can send the signal to several other cells at once.
Explanation:
Mini Case
16. Marc, a first-year college student, starts out on a
backpacking trip in southern New Mexico. It is September,
so the daytime temperatures are quite high, and the
desert air is very dry. He has a portable water filter to treat
river and stream water that he finds on his planned route
through the Gila wilderness. On the second day of his
week-long trip, Marc's water filter breaks. He is afraid of
contracting giardiasis (a protozoal disease spread through
water contaminated by animal feces), so he drinks only the
small amount of water that he can boil on his camp stove
at night. By the fifth night, Marc is feeling weak and thirsty,
and starts to hike out. He makes it to a local highway
and collapses. A passing motorist calls 911 for an
ambulance.
Apply Your Knowledge
a. Given that Marc has sweated a lot, and that sweating
causes the loss of more water than solutes, what has
happened to the solute concentration of Marc's blood
as a result of his dehydration?
b. From the solute concentration of Marc's blood, what
is likely to be happening to his body cells that are in
contact with his blood and related fluids (e.g., lymph
and cerebral spinal fluid)?
c. The paramedics have three saline solutions available.
The first is a "normal" isotonic saline solution (0.9%
NaCl), the second is a hypertonic saline solution
(3% NaCl), and the third is a "half normal" saline
solution (0.45% NaCl). Which one would you use to
treat Marc? Why?
a) Marc's blood now has a higher solute concentration than usual since he has lost more water than solutes. b) Marc's blood has a greater than usual solute concentration, which means that any cells in touch with it are probably osmotically losing water and starting to shrink.
c) Marc has to have his blood volume increased and his present solute concentration lowered (back to a normal concentration). Therefore, the "half normal" saline is most likely your best option. It will increase volume, but when mixed with his concentrated blood, its solute concentration will revert to normal because it is less concentrated than usual.
The amount of a solute per unit volume of a solution, or the concentration of a chemical species in a solution, is expressed as a solute's molar concentration. The most common unit used in chemistry to express molarity is the number of moles per liter, represented by the unit sign mol/L or mol/dm3 in SI units.
The thing that dissolves in a solution is referred to as a solute. In fluid solutions, the solvent is more prevalent than the solute. A chemical solution's concentration is a measurement of the solute content in relation to the solvent content.
In comparison to the solute concentration inside cells, a hypotonic fluid has a lower solute concentration. A red blood cell will experience a net inflow of free water when it is placed in a hypotonic solution.
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A complete protein source is one that provides all of the essential amino acids necessary in our diet.
Which of the following are examples of complete protein sources? Select all that apply.
A. Fish
B. Milk
C. Cheese
D. Sugar
E. Potatoes
Describe how plants leaves are adapted for obtaining carbon dioxide for photosynthesis.
For gas exchange and photosynthesis, leaves are suited. Since they have a wide surface area and stomata, which allow carbon dioxide to enter the leaf and oxygen to exit, they are well equipped for photosynthesis.
The process by which plants convert carbon dioxide, water, and sunshine into oxygen and sugar-based energy is known as photosynthesis.
The main purpose of photosynthesis is to transform solar energy into chemical energy, which is then stored for later use. This mechanism primarily provides energy to the planet's life systems.
The C3, C4, and CAM pathways are the three basic categories of photosynthetic pathways. They all use the Calvin cycle to convert CO2 into sugars, but each pathway does so in a somewhat different way.
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All of the following have been identified by the EPA as health effects of noise pollution EXCEPT:
A. high blood pressure
B. hearing loss
C. severe depression
D. Blue Baby Syndrome
Answer:
high blood pressure, heart disease, sleep disturbances, and stress.
Explanation:
6 Answer:
A _____ hazard is generally a microbe such as a bacterium, virus,
or parasite.
a. biological c. deleterious
b. physical d. chemical
7 Answer:
In a food processing plant, _____ are probably the biggest source
of contamination.
a. employees' hands
b. food preparation surfaces
c. tools and equipment used to handle food
d. employees' feet and shoes
8 Answer:
Procedures developed over time to ensure the production of safe and
wholesome food and to provide a safe working environment are called
_____ practices.
a. sanitization c. good manufacturing
b. post-production d. facility management
9 Answer:
A food-preparation surface that will not rust or deteriorate as a
result of continuous applications of water is said to be _____ resistant.
a. aquatically c. continually
b. corrosion d. sanitizer
10 Answer:
The maintenance of overall cleanliness and hygiene in the food
processing environment is known as food _____.
a. safety c. galvanizing
b. sanitation d. HACCP
11 Answer:
_____ gloves, used to protect hands from knife cuts, are made from
very tiny steel links joined together.
12 Answer:
_____ is another name for pests such as insects or rodents.
13 Answer:
Contamination of a finished product through carelessness or
improper storage procedures is called _____ contamination.
Answer:
A physical hazard is generally a microbe such as a bacterium, virus, or parasite. answer is b
What is the atomic mass?
A. the number of protons found in an element
B. the number of neutrons found in an element
C. the total number of protons and electrons found in an atom
D. the total number of protons and neutrons found in the nucleus of an atom
Answer:
D
you add the number of protons and the number of neutrons
Answer:
the answer is d: the total number of protons and neutrons found in an atom
A population has the following genotype frequencies: AA = 15%, Aa = 35%, aa = 50%.
What is the frequency of the A allele?
What is the frequency of the a allele?
Remember these two equations,
[tex]p + q = 1[/tex]
[tex]p^{2} +2pq+q^{2} =1\\[/tex]
where,
[tex]p[/tex] = frequency of the population's dominant (A) allele
[tex]q[/tex] = frequency of the population's the recessive (a) allele
[tex]p^{2}[/tex] = percent of homozygous dominant (AA) individuals
[tex]q^{2}[/tex] = percent of homozygous recessive (aa) individuals
[tex]2pq[/tex] = percent of heterozygous (Aa) individuals
As given in the question,
the frequency of the "AA" genotype = 35% the frequency of the "aa" genotype = 50%Therefore, the frequency of "A" allele is,
AA = 35% which means that [tex]p^{2}[/tex] = 0.35, by definition.
If [tex]p^{2} = 0.35[/tex] , then [tex]p =\sqrt{0.35} = 0.59[/tex], again by definition. Since p equals the frequency of the A allele, then the frequency of A allele is 59%.
And, the frequency of the "a" allele is,
Since p = 0.59, and p + q = 1, then q = 0.41;
The frequency of a allele is by definition equal to q.
[tex]q = 1- p\\ q = 0.41[/tex]
So, the frequency of the "a" allele is 41%.
Hence the correct answer is, A = 59% and a = 41%.
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how many moles of hydrogen are in 1 litr of water
Answer:
55.55556mols
Explanation:
How are flagella and cilia similar?
They both are made of motor proteins.
All of these are true.
They both contain axoneme.
They both contain basal bodies.
They both use basal bodies.
All the 3 three statements listed are true to both flagella and cilia
In cellular biology, cilia and flagella are the basic units of motion. These beating, hair-like organelles work in systems ranging from the isolated flagella of swimming algae to the dense ciliary carpets that pump fluid in mammalian brains, yet they all share a similar basic structure. The inner workings of single cilia as complex nonlinear oscillators and the range of hydrodynamical phenomena that occur from beating dynamics are now being better understood through experiments and models. These findings provide insight into both the collective phenomena in microbial suspensions and the intricate locomotion techniques seen in single-celled microorganisms. Active filtration, noise resilience, and metachronal waves are only a few emergent phenomena that are demonstrated by dense ciliary arrays in animal systems.
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What type of evidence should NOT be stored in an airtight container because it could cause damage?
a piece of glass
a bullet casing
charred evidence from a fire
bloodstained evidence
How are P waves different from S waves?(1 point) Responses P waves push and pull in the same direction as the wave, and S waves move up and down. P waves push and pull in the same direction as the wave, and S waves move up and down. P waves move under Earth’s surface, and S waves move along Earth’s surface. P waves move under Earth’s surface, and S waves move along Earth’s surface. P waves travel slowly, and S waves travel quickly. P waves travel slowly, and S waves travel quickly. P waves cause damage, and S waves do not cause damage. P waves cause damage, and S waves do not cause damage.
P, S, and Surface waves differ in their propagation direction, velocity, deepness, and in the materials through which they transmit. A) P waves push and pull in the same direction as the wave, and S waves move up and down.
What are the types of seismic waves?There are three types of waves,
P waves ⇒ consist of the transmission of the rock's compressions and rarefactions in the same propagation direction. These waves can be transmitted in the interior of the Earth.P waves are the fastest in moving and can be transmitted through different materials, liquid or solid.
S waves ⇒ they move in a perpendicular direction to the disturbance propagation direction. These waves can also be transmitted in the interior of the Earth.S waves are slower and can not be transmitted through liquid masses.
Surface waves ⇒ They can only propagate through the most superficial layers of the Earth. Their amplitude decrease with depth.Surface waves are the slowest ones.
Due to the difference in speed, the first recorded waves during an earthquake are the P waves, followed by the S waves, and finally, the surface waves.
The difference in waves' speed is used to determine the location of the earthquake focus and the Earth's structure.
According to this framework, we can assume the correct option is A)
P waves push and pull in the same direction as the wave, and S waves move up and down.
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Which of these jobs would be
found in the field of genomics
or biotechnology?
.A. a psychologist that studies mental health
B. an ecologist that studies how living
things interact with their environment
C. an infectious disease specialist that
studies the DNA of infectious organisms
The job that would be inline with the field of genomics or biotechnology is an infectious disease specialist that studies the DNA of infectious organisms
A psychologist that studies mental health and the behavior of humans and animals is a separate field from biotechnology. It involves in-depth studies about the behavior of the subject.
An ecologist that studies how living things interact with their environment is interlinked to being a biotechnologist. But if we look specifically in the aspect of genetic biotechnology it is not connected to the biotechnologist.
An infectious disease specialist that studies the DNA of infectious organisms is more inline with the genetic biotechnologist. Genetic biotechnology deals with the genetic material in the organisms like the DNA and RNA.
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Researchers use a computer model to simulate an oil spill in the ocean. The model predicts which areas of the shoreline will be most impacted by an oil spill if it occurs in a certain area. What are two limitiations of this model? A. It does not predict a situation that might cause an oil spill to happen. B. It does not show how an oil spill might spread from one area to another. C. It cannot be used to evaluate how an oil spill might affect multiple areas of shoreline. D. It does not show how each species of wildlife would be affected by the oil spill.
It does not predict a situation that might cause an oil spill to happen.
When oil debris reaches shorelines and shorelines, it interacts with sediments such as beach sand and gravel, rocks and rocks, plants, terrestrial wildlife, and human habitats, causing both erosion and pollution. Waves, currents, and wind bring the oil ashore with waves and tides.
Under certain circumstances, oil spills can be very harmful to seabirds turtles, and mammals, and can also harm fish and crustaceans. Oil destroys the insulating abilities of fur-bearing mammals such as sea otters and the water repellency of bird feathers, exposing them to harsh elements. Coral reefs Corals are also very sensitive to oil contamination. Various studies have shown that damaged coral reefs regenerate very slowly. Oil pollution can also affect entire communities.
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Answer:
A and D
Explanation:
Anyone able to help out with this? :)
Answer:
A
Explanation:
Look at the graph at 1000, and then look at it again at 2000, then subtract the amount from year 2000 from 1000, and the answer is 135, and you can see at the graph, it goes up, meaning it would be an increase of 135 ppm
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day :)
EachlinerepresentsYearisaboutppmandyearisaboutppm.Thisgivesusppm.A=AnIncreasrefertothegraph)ifppm.P.s.Thist
1 Answer:
HACCP is a program designed to create awareness of potential points
of contamination in a food-processing facility.
a. true
b. false
2 Answer:
A bacteriostatic agent uses static electricity to remove bacteria
from a surface.
a. true
b. false
3 Answer:
The three major sources of contamination in a food processing plant
are people, processing equipment, and the plant environment.
a. true
b. false
4 Answer:
Water hardness is a measure of the presence of substances in water
that form insoluble precipitates with soap.
a. true
b. false
5 Answer:
The floor of a food processing facility should have an unfinished
concrete surface for easy cleaning.
a. true
b. false
What is a homogeneous mixture?
Answer:
Homo means the same, therefore a homogenous mixture is a mixture that is the same all the way through
How many orbitals are in the first energy level?
Answer:
Energy level I has just one orbital, so two electrons will fill this energy level. Energy level II has four orbitals, so it takes eight electrons to fill this energy level.
what's half of the earth
Answer:
hemisphere
Explanation:
Help me with this complete the sentence plss help mee
Answer:
1. chloroplasts 2. sunlight 3.oxygen 4.glucose 5.carbon dioxide
Explanation:
hope this helps :)
Susie, an active 6 year old, was burned while playing around a fireplace. Her nightgown caught on fire and she burned both legs, her back, her left arm, and one side of her face. What percentage of body tissue was burned
58.5% of the body's tissue was burnt while children were playing near a fireplace.
Describe tissue:Between cells and an entire organ, there is a biological organizing level called tissue. The extracellular matrix and analogous lymphocytes of the same origin that collaborate to carry out such a single function make up a tissue. Then, different tissues are arranged in functional groups to form organs.
What are the four types of tissues?Epithelial, connective, muscular, and nerve tissue make up the four different forms of bodily tissue. Epithelial tissue is composed of layers of cells that line interior cavities, create glands, and coat the body's exterior-facing surfaces.
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How would cellular respiration be impacted in the absence of photosynthesis?
Answer:
Cellular respiration would decrease as there would be less oxygen for respiration to occur and an excess of carbon dioxide
What alternate form of genes do nucleic acids have that allows them to offer variability?
allele
codon
nucleotide
chromosomeFind the correlating coefficient.
Age
Height (in.)
5
36
6
40
7
42
8
47
9
50
Group of answer choices
b= 18.5
= .9879
a= 3.5
r= .9939
A
Explanation:
bnmlkjnhb
to accurate, a theoery must continue to explain
This might of gone in science but a prediction
A student observes two objects in space with his telescope. Both objects are seen orbiting the Sun. Which two objects are most likely observed by the student?
A student observes two objects in space with his telescope. Both objects are seen orbiting the Sun. Which two objects are most likely observed by the student?
a comet and an asteroid
a meteorite and a comet
a meteor and an asteroid
a meteor and a meteorite
The two objects orbiting the Sun which are most likely observed by the student with a telescope are: A. a comet and an asteroid.
What is a telescope?A telescope can be defined as an optical instrument which comprises a curved mirror and lenses and it is typically used for viewing distant objects.
This ultimately implies that, a telescope is designed and developed for viewing or taking pictures of objects that are very far away such as the Sun, stars and other planetary bodies.
What is the Sun?The Sun can be defined as an astronomical (celestial) body found within the solar system around which planetary (astronomical) bodies revolve (orbit) and whose light shines on planet Earth to differentiate day and night.
Based on astronomical records and information, the group of objects that orbit the Sun include the following:
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