After several weeks of exercise, a human athlete's resting heart rate is typically lower than before because
A) the body needs less oxygen than before.
B) the body temperature has increased.
C) the stroke volume has increased.
D) the cardiac output has decreased.
E) the body produces less carbon dioxide than before.
Answer: C) the stroke volume has increased.
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Cholesterol is a structural component of cell membranes. Amount of cholesterol present can affect membrane stability and permeability. What is the role of cholesterol in a membrane? A. A membrane that needs to be more rigid and more permeable, would have high cholesterol ratios. B. A membrane that needs to be rigid, such as a protective barrier, would have low cholesterol ratios. C
Membranes with low amounts of cholesterol are very stable and have increased permeability. D. Membranes with high amounts of cholesterol are very stable and have decreased permeability.
The plots that were staked out on the island were part of the:
A. applied research. B. basic research. C. experimental design. D. constructed model.
When a signaling molecule binds to a G protein linked receptor, the ligand-receptor complex
associates with GDP protein and causes GDP to be replaced by GTP. __________________ Indicate whether the statement is true or false.
Which kind of metabolic poison would interfere with the glycolysis stage of cellular respiration?
A) An agent that reacts with FADH2 and oxidizes FAD+ B) An agent that closely mimics the structure of glucose but is not capable of being metabolized and broken down C) An agent that binds to lactate and inactivates it D) An agent that reacts with oxygen and depletes its concentration in the cell E) An agent that inhibits the formation of acetyl CoA