MEDICAL PHYSIOLOGY

PHYSIOLOGY

CENTRAL NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Sympathetic nervous system stimulation causes:
A
Increased blood glucose, increased GI peristalsis, and decreased heart rate and blood pressure
B
Decreased blood glucose, increased GI peristalsis, and decreased heart rate and blood pressure
C
Decreased blood glucose, decreased GI peristalsis, and decreased heart rate and blood pressure
D
Increased blood glucose, decreased GI peristalsis, and increased heart rate and blood pressure
Explanation: 

Detailed explanation-1: -Thus, the sympathetic nervous system increases the body’s production of glucose both directly (through the nerves) and indirectly (through hormones released during activation). In addition to increasing blood sugar, epinephrine also contributes to insulin resistance.

Detailed explanation-2: -In the heart (beta-1, beta-2), sympathetic activation causes an increased heart rate, the force of contraction, and rate of conduction, allowing for increased cardiac output to supply the body with oxygenated blood.

Detailed explanation-3: -Sympathetic nerve fibers generally decrease peristalsis and secretomotor functions (i.e., decreased fluid secretion). Parasympathetic nerve fibers generally increase peristalsis, relax involuntary sphincters, and increase secretomotor activities.

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