The nerve impulses from the sympathetic neurons ___________, while the nerve impulses from the parasympathetic neurons ___________.
A) increase heart rate and contraction strength; decrease heart rate and contraction strength
B) increase heart rate but do not affect heart contraction strength; decrease heart rate but do not affect heart contraction strength
C) decrease heart contraction and contraction strength; increase heart rate and contraction strength
D) increase heart rate and contraction strength; decrease heart rate but do not affect heart contraction strength
Correct Answer:
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Q45: Excess levels of blood K+
A)increase heart rate
Q46: As arterioles constrict, peripheral resistance _ and
Q47: At the venular end of a capillary,
Q48: _ contain nearly 60% of the total
Q49: Valves are found in some
A)capillaries.
B)veins.
C)arteries.
D)arteries and veins.
Q51: The wall of capillaries consists of
A)a layer
Q52: An increase in _ nerve impulse frequency
Q53: The tunica media is found in
A)veins only.
B)arteries
Q54: The diastolic blood pressure is the lowest
Q55: The systolic blood pressure is the greatest
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