Which of the following cells is the most critical cell in immunity?
A) B cell
B) helper T cell
C) cytotoxic T cell
D) APC
B) helper T cell
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How much more permeable to water is the glomerular capillary wall compared to capillaries elsewhere in the body?
a. 100x b. 50x c. 20x d. 10x e. 2x
What is found in the buffy coat when blood is centrifuged? What percent of total blood volume does the buffy coat contribute?
What will be an ideal response?
Which of the following statements about the loop of Henle of juxtamedullary nephrons is correct?
a. The ascending limb is freely permeable to H2O and NaCl. b. The filtrate is isotonic as it enters the loop, hypertonic at the tip of the loop, and hypotonic as it leaves the loop. c. The descending limb actively transports NaCl out of the tubule into the interstitial fluid. d. All of the above. e. None of the above.
Tissue perfusion is largely controlled by ______ to ensure that blood flow meets the cells' needs.
What will be an ideal response?