Endurance athletes commonly have a resting heart rate as low as 40 bpm, and a stroke volume as low as 50 mL/beat.
Answer the following statement true (T) or false (F)
False
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The active transport of solutes out of the blood and into the tubular fluid is called
A. filtration. B. tubular reabsorption. C. tubular secretion. D. fenestration. E. titration.
A patient is prescribed an MAO inhibitor by their doctor. Knowing the actions of MAO inhibitors, this patient's diagnosis may be ________.
A. depression, since MAO inhibitors block the binding of serotonin to postsynaptic cells B. depression, since MAO inhibitors block the degradation of serotonin at the synapse C. hypertension, since MAO inhibitors block the release of norepinephrine from sympathetic axons D. hypertension, since MAO inhibitors block the degradation of norepinephrine at the synapse
Chemoreceptors that regulate breathing are located in the
A) brachiocephalic vein and superior vena cava B) carotid artery and aorta C) cerebellum and pons D) coronary sinus and alveoli
Concerning heart sounds, which of the following is correct?
A. The first heart sound occurs at the beginning of ventricular systole. B. The second heart sound is heard when the AV valves are closing. C. The first heart sound is the sound of the semilunar valves closing. D. The second heart sound occurs when blood flows into the superior vena cava. E. The first heart sound occurs at the beginning of ventricular diastole.