Answer:
Venous return (VR) is the flow of blood back to the heart.
Venous return to the right atrium is the most important factor determining cardiac output, provided both ventricles and the pulmonary circulation are normal.
Explanation:
Venous return refers to the flow of blood from the periphery back to the right atrium, and except for periods of a few seconds, it is equal to cardiac output.
Venous return is facilitated by a number of factors, including inspiration, increased total blood volume, increased venomotor tone, the cardiac suction effect, the presence of venous valves and the skeletal muscle pump.
Contraction of the skeletal muscles surrounding veins increases the pressure within the veins, pushing open the proximal valve and forcing blood toward the heart. For example, when calf muscles contract during exercise, blood is forced toward the heart, thus increasing venous return.
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If the new compound breaks down into amino acids and functions to break down organic matter into food for the plant, then the researchers discovered a biological catalyst.
<h3>What is an enzyme?</h3>
An enzyme can be defined as a special type of biological catalyst that helps to speed up the rate of a given chemical reaction.
Enzymes are proteins that can be considered as the main class of biological catalysts, but there are also other biological catalysts called ribozymes which are specifically composed of nucleic acids, i.e., RNA-based catalysts.
In conclusion, if the new compound breaks down into amino acids and functions to break down organic matter into food for the plant, then the researchers discovered a biological catalyst.
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Explanation:
Facilitated Diffusion is the Diffusion of solutes through transport proteins in the plasma membrane....
Instead, they diffuse across the membrane through transport proteins.
so Is the process of spontaneous passive transport.
B biosphere that the correct awnser
Answer:I don’t know this one.
Explanation:but it should be a
