ANS Regulation

Question 1

What does sympathetic stimulation do in the eye? Parasympathetic?

Answer 1

SYMPATHETIC:
α1 = radial muscle pupillary dilation
β2 = ciliary muscle relaxation

PARASYMPATHETIC:
M3, M2 = sphincter muscle pupillary constriction and ciliary muscle contraction

Question 2

What does sympathetic stimulation do glands of the head? Parasympathetic?

Answer 2

SYMPATHETIC:
α1 = increased lacrimal and salivary secretion

PARASYMPATHETIC:
M3, M2 = intensely increased lacrimal and salivary secretion

Question 3

What does sympathetic stimulation do in the lungs? Parasympathetic?

Answer 3

SYMPATHETIC:
β2 = bronchiolar smooth muscle dilation

PARASYMPATHETIC:
M3, M2 = bronchiolar smooth muscle constriction

Question 4

What does sympathetic stimulation do in the heart? Parasympathetic?

Answer 4

SYMPATHETIC:
β1>β2 = increased SA node heart rate, increased atrial and ventricular contractility/conduction, increased AV node automaticity/conduction

PARASYMPATHETIC:
M2>M3 = decreased SA node heart rate, decreased atrial and ventricular contractility/conduction, decreased AV node conduction

Question 5

What does sympathetic stimulation do in the blood vessels? Parasympathetic?

Answer 5

SYMPATHETIC:
α1, α2 = constriction
β2 = dilation

Question 6

What does sympathetic stimulation do in the GI tract? Parasympathetic?

Answer 6

SYMPATHETIC:
α1, α2, β1, β2 = decreased motility
α1 = increased tone and decreased secretion

PARASYMPATHETIC:
M3, M2 = increased motility, decreased tone, increased secretion

Question 7

What does sympathetic stimulation do in the urinary bladder? Parasympathetic?

Answer 7

SYMPATHETIC:
β2 = detrusor relaxation
α1 = sphincter contraction

PARASYMPATHETIC:
M3>M2 = detrusor contraction and sphincter relaxation

Question 8

What does sympathetic stimulation do in the adrenal medulla?

Answer 8

SYMPATHETIC:
N(N) = secretion of EPI

Question 9

What does sympathetic stimulation do in the kidney?

Answer 9

SYMPATHETIC:
β1 = increased renin secretion

Question 10

What does sympathetic stimulation do in the liver?

Answer 10

SYMPATHETIC:
α1 = glycogenolysis
β2 = gluconeogenesis