ADH level in nephrons regulates water output by causing
A) the distal convoluted tubule and collecting duct to reabsorb more or less sodium
ions.
B) the distal convoluted tubule and collecting duct to reabsorb more or less water.
C) the glomerulus and proximal convoluted tubule to filter less or more water.
D) the glomerular capsule and nephron loop to absorb more or less water.
B
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Ribs that join the sternum directly by costal cartilages are called
A. vertebrochondral ribs. B. floating ribs. C. false ribs. D. true ribs.
A sample of John's blood shows a high level of pyrogens. This would indicate that John
A) is feeling achy. B) is producing T lymphocytes. C) has a sore throat. D) is running a fever. E) has swollen lymph nodes.
Platelets are capable of shrinking after the formation of a blood clot because they contain molecules of actin and ________.
Fill in the blank(s) with the appropriate word(s).
Membrane-bound receptors
A. can interact with DNA in the nucleus. B. are small, lipid soluble molecules. C. have their receptor sites on the outer surface of the plasma membrane. D. do not exhibit specificity. E. have no effect on the cell.