The cardiovascular system is sometimes called the blood-vascular, or simply the circulatory, system. It consists of the heart, which is a muscular pumping device, and a closed system of vessels called arteries, veins, and capillaries.
The system that contains the heart and the blood vessels and moves blood throughout the body. This system helps tissues get enough oxygen and nutrients, and it helps them get rid of waste products. The lymph system, which connects with the blood system, is often considered part of the circulatory system.
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Why is the energy transfer between tropical levels not even close to 100% efficient
Answer:
because at each level there is respiration loss
Explanation:
i think tell me if im rong
Why do metals dissolve in acids?
Answer:
In water or acids, the metals trade places with hydrogen. The hydrogen escapes as a gas, and metal atoms, no longer attached to the object from which they came, dissolve in solution.
sorry if I'm wrong but I wrote this in my hw and it was right so ye
Which of these processes is MOST directly involved in the resorption of a tadpole’s tail during development?
A. Apoptosis
B. Mitosis
C. Phagocytosis
D. Protein synthesis
Answer:
A. Apoptosis
Explanation:
What is the bayolegy
If you're talking about biology, it is the study of Earth. If this is not what you're looking for, I'm sorry.
Beaker A contains 6 liters of water and 1 osmole of glucose. Beaker B contains 10 liters of water and 2 osmoles of glucose. Which one has the greater osmolarity and by how much?
From the ratio of glucose osmole to the volume of water in the two beakers, beaker B would have the greater osmolarity.
The term osmolarity refers to the number of particles of solutes or osmoles of substances per liter of solution.
In this case, the osmolarity of beaker A can be calculated as;
1 osmole/6 liter
= 0.167 osmolar
The osmolarity of beak B can be calculated as:
2 osmoles/10 liter
= 0.2 osmolar
Thus, beaker B with 0.2 osmolar has the greater osmolarity when compared to beaker A with 0.167 osmolar.
More on calculating concentrations can be found here: rainly.com/question/17329736
Answer: B
beaker A is 0.16 Osm/L and Beaker B is 0.2 Osm/L Beaker B has a greater osmolarity by 0.04 Osm/L
Explanation:
What is a DEPENDENT variable? A. the group under normal conditions that is not experimental B. the variable that is changed and being tested C. the variable being recorded or observed D. the observation made that began the experiment
Answer: something that can not be alone it relies on the independable varieble
Explanation:
its depends on the conditions you put it through you HAVE to have an independable varable in order for their to be a dependant variable. so A i was leaning toward B tho
Determine the age of the rocks and fossils by moving the samples to the mass-spectrometer. Record the data in the Student
Guide
Answer:
No answer
Explanation:
This is just a data collecter, to add the information into your 'Student Guide". Don't fret !
Answer:
No answer needed. Just drag them over, and record the evidence in the eNotes.
Explanation:
The following is the chemical equation for photosynthesis:
Based on this equation, answer the following:
explain the adaptations of the kidney nephrons to their duty(give three at least)
It has a selective permeable Bowman's capsule that only allows food substances and food products to pass through but prevents the passage of plasma proteins and blood cells. ... The kidney tubules are highly vascularised to ensure constant removal of reabsorbed substances hence creating more room for further reabsorption.
20
Drag each label to the correct location on the image.
When a honey bee stings or a pathogen attacks, the body elicits an inflammatory response. Label the processes that happen during an
inflammatory response.
The inflammatory response is a type of body response produced in response to damaged tissue, attack of pathogen and or any other cause.
The body shows an inflammatory response in the following manner:
1. Recognition of stimulus- receptors recognize the antigens.
2. Release of inflammatory markers: affected cells produce chemicals like histamine, bradykinin, and prostaglandins.
3. Vascular permeability changes and leukocyte (WBC) recruitment- released chemicals causes the blood vessels to leak fluid causing swelling and attract WBC.
4. Accumulation of leukocytes- WBC performs the process of phagocytosis which eats dead or damaged cells and germs.
I hope this is what you were looking for
28
¿Cuántos elementos hay presente en una molécula de agua (H20)?
(3 puntos)
1
2
3
4
Answer:
sana all may brainnnnnnnnnnn
please help me figure this out
What factors create deep ocean currents
Answer:
Deep currents are driven by temperature and water density/salinity. Of course, deep currents impact surface currents, which carry warm water to the poles. Surface currents are also driven by global wind systems fueled by energy from the sun. Factors like wind direction and the Coriolis effect play a role.
Explanation:
If human red blood cells are placed in a 0 osmoles/L solution, a 100 osmoles/L solution, a 300 osmoles/L solution, and a 500 osmoles/L solution, then _________________ will be the isotonic solution.
OPTIONS:
0 osmoles/L solution
100 osmole/L solution
300 osmoles/L solution
500 osmoles/L solution
If human red blood cells are placed in solutions of different osmolarity, then the 300 osmoles/L solution will be the isotonic solution.
An isotonic solution to the red blood cell would be a solution that has the same solute concentration as the red blood cell.
Isotonic solutions are different from hypotonic and hypertonic solutions. Hypotonic solutions would have lower solute concentrations than the red blood cell while hypertonic solutions would have higher concentrations than the red blood cells.
The red blood cells of humans have a certain amount of solute in their cell sap which has been approximate to be between 286 and 295 osmoles/L. Thus, the only solution close to being an isotonic solution to these cells would be the 300 osmoles/L solution.
More about osmolarity can be found here: https://brainly.com/question/8144230
Answer: 300 osmoles/ L solution
Explanation:
The 300 osmoles/ L solution is the solution closest to the osmolarity of a normal human red blood cell.
This means that the 300 osmoles/ L solution is the isotonic solution. If added to human red blood cells, the shape and size of the red blood cells with remain as they were, unchanged (unlike if a hypotonic/ hypertonic solution was added.)
An organism’s scientific name consists of which TWO taxonomic groups? (Select the TWO correct answers).
Class
Domain
Genus
Species
Kingdom
Phylum
Order
Family
Answer:
Scientists use a two-name system called a Binomial Naming System. Scientists name animals and plants using the system that describes the genus and species of the organism. The first word is the genus and the second is the species
An organism’s scientific name consists of which two taxonomic groups, genus, and species. The correct options are c and d.
What are taxonomic groups?Taxonomic groups are the groups that contain different groups in which the organism are divided. These are arranged from higher to lower groups. The highest group is the kingdom.
Kingdoms are divides of the different organisms of the earth. Taxonomy is organizing different organisms in a line so, that it will be easy for their studying.
The two taxonomic groups that come in last are genus and species. Genus and species make the scientific name of the organism. The genus contains animals that are most similar to each other. Species are similar organisms, that can breed with each other.
Therefore, the correct options are c, Genus, and d, Species.
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Fatty acids are the basic unit of which macromolecule?
Select all the molecules that are produced in photosynthesis and then used in cellular respiration
ATP
Water
Oxygen
Glucose
Carbon Dioxide
Answer:
carbon dioxide
Explanation:
cells use carbon dioxide and energy from the sun to make sugar molecules and oxygen
PLS HURRY!!!
What is the function of chloroplasts in plants?
O to produce food
O to absorb nutrients
O to provide support
O to allow air to pass
Answer:
To produce food is the correct answer.
How is population size and population density dofferent
Answer: Population size means the total number of organismns in a given area like number of oak trees in a forest. Population density means number of organisms living per unit area like number of oak trees in say 1 sq km of the forest.
Explanation: :)
AMP-PNP is a non-hydrolyzable ATP analog that cannot be metabolized by cells. Taurocholate is a bile acid that helps emulsify fats. When taurocholate is added to hepatocyte cell culture, it accumulates in those cells. The graph below shows the rate of cellular accumulation of the drug taurocholate in the presence of either no ATP, ATP, or AMP-PNP. Based on this data, describe the mechanism by which taurocholate enters the cell. Justify your answer.
Answer:
ATP plays a critical role in the transport of macromolecules such as proteins and lipids into and out of the cell. The hydrolysis of ATP provides the required energy for active transport mechanisms to carry such molecules across a concentration gradient.
Explanation:
ATP plays a critical role in the transport of macromolecules such as proteins and lipids into and out of the cell.
What is ATP?
A vital "energy molecule" present in all living things is adenosine 5′-triphosphate, also known as ATP and typically written without the 5′-. In particular, it is a coenzyme that transfers energy to cells by releasing its phosphate groups when it interacts with enzymes like ATP triphosphatase.
Particular to plants and cyanobacteria is the process of photophosphorylation. During photosynthesis, it is the conversion of ADP to ATP utilizing solar energy. In the mitochondria of a cell, the process of cellular respiration also results in the formation of ATP.
This can be done through either anaerobic or aerobic respiration, depending on whether oxygen is present.
Therefore, ATP plays a critical role in the transport of macromolecules such as proteins and lipids into and out of the cell.
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Place the following in the correct order as they occur in CELL RESPIRATION.
1. In cytosol, 6-C glucose and 2 ATP split into two 3-C molecules (glycolysis)
2. Acetyl Co-A enters mitochondria and drops off 2-C molecules
3. 2-C molecule combines with 4-C molecule and breaks into two 3-C molecules
4. Resulting 3 C molecule is stabilized BEFORE entering the mitochondria
5. Krebs cycle spins twice; each time stripping 1 carbon to make Co2 as a by-product
6. With each cycle of Krebs, electrons and H+ ions pop off, are picked up by NADH and FADH2 and taken to ETC
7. Electrons and h+ ions pop off and are picked up by NADH
8. 4 molecules of ATP are generated
9. Coenzyme A attaches to 2-C molecule making Acetyl Co-A
10. 1 C is stripped from 3-C PGA and makes Co2
Please help ;(
What is the amplitude?
1) The distance between the two crests
2) The highest point in the wave
3) The lowest point in the wave
4) the distance from the center of the wave to the crest or the trough.
Answer:
4) the distance from the center of the wave to the crest or the trough.
Explanation:
Which type of fossil does this image depict?
A.
cast
B.
carbon imprint
C.
mineralized fossil
D.
original-tissue fossil
Answer:
this is a mineralized fossil
Explanation:
Answer:
its a cast. i took a test and got it right <3
Explanation:
Which statement best explains why the atmosphere is considered an open system?
A.
There is no definite boundary separating it from outer space.
B.
Energy and matter can enter and leave.
C.
Its molecules can move freely, without resistance.
D.
It can accept an unlimited amount of energy.
Answer:
thw anser is A
Explanation:
Hellpppp I really need the answers
Answer:
x- summer y- winter
Explanation:
It looks like x is closer to the equator and would therefore have hotter weather, meanwhile y looks like it's closer to the top of the planet (where its a lot colder)
What are proteins and how do you detect them ?
Answer:
Immunological-based methods such as quantitative enzyme-linked immunosorbent assays (ELISA), Western blotting and dot blotting are very common and sensitive assays for protein detection, and they use antibodies that react specifically with entire proteins or specific epitopes (e.g., fusion tags) after cell lysis.
Which of the following choices is a component in the community of a wetlands
ecosystem?
A. Water
B. Sunlight
C. Soil
D. Frog
Answer: Water
Explanation:
A community is the occupied space by a population of two or more species. Water is a community component of a wetland ecosystem. Thus, option A is correct.
What is a wetland ecosystem?Wetland is a type of ecosystem that comprises water reservoirs and has an excess of stored water in the form of bogs, marshes, and swamps. A wetland ecosystem includes many biotic and abiotic factors that interact and live together.
The wetland ecosystem is characterized by the presence of water throughout all the years. It is a valuable ecosystem that absorbs excess precipitation so as to avoid flooding and soil erosions. Hydrology, soils, and biology are the main components of the ecosystem.
Therefore, option A. water is the component of the wetland ecosystem.
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please help me out with this newsela question
Answer: the answer is a
Explanation:because it is stating that you have to see if there is anything involving chemical substances.
Plz help I need help
Answer:
provide support and structure to the cell
Answer:
option c
Explanation: PLS MARK BRAINLIEST
Which process creates food for plants in order to maintain homeostasis? Breathing O Cell division Cellular respiration Photosynthesis
Answer:
Photosynthesis
Explanation:
Photosynthesis