What organ system do the kidneys belong to?
What will be an ideal response?
Ans: Urinary System
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Decreased blood flow to tissues is called ischemia
Indicate whether the statement is true or false.
Contraction of the papillary muscles would
A. prevent the AV valves from protruding into the atria. B. open the semilunar valves. C. eject blood from the ventricles. D. close the semilunar valves. E. cause the atria to eject their contents into the ventricles.
Depolarization of a cardiac muscle cell occurs as the result of
A. the closure of the voltage-gated Na+ channels. B. a decrease in the permeability of the plasma membrane to Na+. C. the opening of voltage-gated Na+ channels and voltage-gated Ca2+ channels. D. the opening of voltage-gated K+ channels. E. the closure of voltage-gated Ca2+ channels.
The sac that regulates the temperature of the testes is the ___________.
Fill in the blank(s) with the appropriate word(s).