The glomerulus is:
a. part of the renal tubules
b. a network of blood capillaries
c. the cup-shaped top part of the nephron
d. both A and B above
b. a network of blood capillaries
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Cardiac reserve is
A. the potential increase in stroke volume someone would show if they engaged in athletic training. B. the increase in cardiac output an individual is capable of demonstrating during vigorous exercise. C. the amount of blood left in the heart after the ventricle has contracted during cardiac cycles at rest. D. the blood that the heart uses to nourish its cardiac muscle and does not put into general circulation.
Which of the following statements regarding voltage-gated K+ channels is true?
A. These channels have only one gate. B. These channels open more slowly than Na+ channels. C. Once open, these channels remain open until repolarization is complete. D. These channels are specific for potassium. E. All of these statements are true.
Which of the nitrogenous bases is part of DNA but not RNA?
A) Thymine B) Uracil C) Guanine D) Cytosine
Within the spleen where will an old, worn-out red blood cell be phagocytized?
A) Splenic sinusoids B) Splenic cords C) White pulp D) Capsule