Autonomic Physiology 2

Question 1

What receptors does the parasympathetic system act upon on the ciliary muscle around the lens?

Answer 1

B2

Question 2

What effects does B2 ciliary receptors have on muscle around the lens?

Answer 2

Relaxes - eye focuses further away.

Question 3

What receptors are activated by the sympathetic system on the radial muscle

Answer 3

A1

Question 4

What do A1 receptors do to the radial muscle

Answer 4

They contrat, which pulls on the Iris and makes pupil larger

Question 5

What action does the parasympathetic system have on ciliary muscle?

Answer 5

Activates muscarinic - contracts and eye focuses closer

Question 6

Parasympathetic on radial muscle?

Answer 6

Pupil contracts.

Question 7

Sympathetic effect on the heart pacemaker?

Answer 7

B1 receptors on pacemaker, increases HR

Question 8

Sympathetic effect on myocytes?

Answer 8

B1 receptors, increases strength of contraction.

Question 9

Parasympathetic effect on pacemaker

Answer 9

Muscarinic receptors - increases strength of contraction

Question 10

Parasympathetic effect on myocytes?

Answer 10

Little effect

Question 11

Sympathetic effect on the lungs

Answer 11

B2 receptors on smooth muscle - dilates airways

Question 12

Parasympathetic effect on lungs

Answer 12

Muscarinic on smooth muscle - constricts airways

Question 13

How does salbutamol work?

Answer 13

B2 agonist, dilates airway

Question 14

How does salbutamol not affect the heart?

Answer 14

Has no effect on B1 receptors

Question 15

How does atenolol work when tachycardic?

Answer 15

B1 antagonist - decreases HR

Question 16

Sympathetic effect on blood vessels (A1)

Answer 16

Vasoconstriction in the gut

Question 17

Sympathetic effect on blood vessels (B2)

Answer 17

Vasodilation of heart and skeletal muscle.

Question 18

Parasympathetic effect on blood vessels?

Answer 18

Not much effect

Question 19

What structures’ blood flow does the parasympathetic system have an effect on?

Answer 19

Genitalia and salivary gland

Question 20

What is tone?

Answer 20

Ongoing, continuous activity of a system

Question 21

Sympathetic effect on the gut

Answer 21

Activates a/b receptors on smooth muscle, decreases gut motility.

Question 22

What does the sympathetic system do to the pancreas?

Answer 22

Activates A receptors which inhibits enzyme secretion

Question 23

Parasympathetic effect on gut

Answer 23

Muscarinic receptors on smooth muscle, increase gut motility

Question 24

Parasympathetic on pancreas?

Answer 24

Muscarinic - increases enzyme secretion