An important stimulus for the secretion of aldosterone is
A. decreasing potassium ion concentration.
B. increasing calcium ion concentration.
C. increasing sodium ion concentration.
D. increasing potassium ion concentration.
Answer: D
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Cardiac muscle cells and skeletal muscle cells differ in a few ways. Which of the following is not one of them?
A) Cardiac muscle cells are smaller in size. B) Cardiac muscle cells have a single, centered nucleus. C) Cardiac muscle cells branch. D) Skeletal muscle cells lack intercalated discs. E) Cardiac muscle cells lack transverse tubules.
Sweating is a result of sympathetic stimulation
Indicate whether this statement is true or false.
GH promotes __________.
A) cell division B) protein synthesis C) bone growth D) all of the above
All of the following are true of polysynaptic reflexes except that they
A) are arranged according to dermatomes. B) are intersegmental in distribution. C) involve reciprocal innervation. D) have reverberating circuits that prolong the reflexive motor response. E) involve pools of interneurons.