The most rapid decline in blood pressure occurs in the ___________ because of their ____ resistance.
A. large arteries; high
B. medium-sized arteries; low
C. arterioles; high
D. elastic arteries; low E. veins; high
Ans: C. arterioles; high
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You are a neurosurgeon exploring a patient's right primary motor cortex during awake brain surgery. As you stimulate various areas, you are asking the operating room nurses to watch for the resulting muscle contractions on the left side of the patient's body.
Answer the following statement true (T) or false (F)
Which type of innervation causes the heart rate to increase?
A. Parasympathetic B. Sympathetic
Most of the circulating antibodies are derived from _____ class immunoglobulin.
A) A B) E C) G D) D
Vagal influences on the heart result in
a. enhanced calcium permeability at the SA node. b. enhanced potassium permeability at the SA node. c. less frequent depolarization of the SA node. d. both (a) and (b) above. e. both (b) and (c) above.