The urethra contains an internal sphincter of smooth muscle.
Correct Answer:
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Q21: In the kidneys,the countercurrent mechanism involves the
Q22: Match the following:
-High pressure vessel that forces
Q23: Match the following:
-Low pressure,porous vessels that reabsorb
Q24: Match the following:
-Fenestrated vessels that allow passage
Q25: The path urine takes after it is
Q27: Angiotensin II is a substance made by
Q28: If the GFR is too low,needed substances
Q29: The act of emptying the bladder is
Q30: In the absence of hormones,the distal tubule
Q31: Match the following:
-May form meandering vessels or
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