The most important buffer in our plasma is _______
A. bicarbonate
B. phosphate
C. protein
D. all are equally important
Answer: A. bicarbonate
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The stretch reflex
A) is an example of a polysynaptic reflex. B) is important in regulating muscle length. C) involves a receptor called the Golgi tendon organ. D) is activated when a smooth muscle lengthens. E) is voluntary.
Which of the following is NOT a secondary lymphoid organ?
A. thymus B. lymph nodes C. tonsils D. spleen
Urine is conveyed out of the body by a tube called the ________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements on sodium movement in the renal tubules is TRUE?
A) Sodium channels are located on the basolateral membrane of principal cells. B) Sodium is actively secreted from the collecting duct. C) Sodium reabsorption follows water reabsorption in all segments of the renal tubules. D) Sodium is actively transported across the basolateral membrane of both the proximal and distal tubule. E) Sodium is actively secreted from the proximal tubule.