Urinary K+ excretion is increased by which of the following?
A. hypokalemia
B. hyperaldosteronism
C. antidiuretic hormone (ADH)
D. a decrease in GFR
E. administration of amiloride
ANS: B
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Which choice lists structures in order of increasing size?
A. nitrogenous base - nucleotide - gene - chromosome - genome B. cell - organelle - tissue - organ C. genome - nucleus - chromosome - nucleotide - gene D. nitrogenous base - nucleotide - gene - genome - chromosome
Where are the transverse palatine folds located?
A. Hard palate B. Soft palate C. Glossopalatine arch D. Labial frenulum E. Pharyngopalatine arch
The main components of the plasma membrane are
A. proteins and carbohydrates. B. lipids and ions. C. ions, lipids, and proteins. D. carbohydrates, ions, and lipids. E. proteins, lipids, and carbohydrates.
Which of the following is not accomplished by thrombin?
a. stimulates conversion of fibrinogen to fibrin b. activates tissue thromboplastin, which initiates the extrinsic clotting pathway c. activates factor XIII (fibrin-stabilizing factor) d. enhances platelet aggregation e. acts in positive-feedback fashion to facilitate its own formation