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Compared to resting conditions, how does exercise affect blood flow to the heart?

Read the instructions and each question carefully. Identify the choice that best or most specifically completes the statement or answers the question. Each question is worth 2 points (unless otherwise specified) for a total of 100 points.

As exercise progresses from low intensity to high intensity, what is the order in which more muscle fibers are activated to supply the required force?

If we could artificially alter the membrane permeability of pacemaker cells so that potassium efflux was increased compared to normal circumstances, what would be the result?

What is defined as “a decrease in the oxygen-carrying capacity of blood?”

For 2 points of extra credit, finish this sentence: The coolest thing we’ve learned about in class so far is ________. (There is no wrong answer here; just tell me what you think.)

Compared to resting conditions, how does exercise affect blood flow to the skin?

The research lab you work in is doing a study on endurance exercise. You are asked to analyze a muscle biopsy from the leg of an Olympic marathon runner. Because of his training, you expect the majority of the fibers from the runner’s leg to exhibit which set of the following characteristics?

Erythrocytes are synthesized in the ________. This process is triggered by the release of ________ from the ________.

Dr. Hansen goes to the doctor for her routine annual physical. The exam begins with the nurse taking her vitals. Her blood pressure is 102/71. Her heart is beating 73 times per minute. Prior to each contraction, there is 160 ml of blood in her left ventricle, and 55 ml remains in the ventricle after the heart contracts. What is Dr. Hansen’s pulse pressure?