Autonomics DSA

Question 1

What is the rule regarding Alpha receptors in Vascular Smooth Muscle?

Answer 1

It causes Vasoconstriction

Question 2

What is the rule regarding Beta Receptors regarding vascular smooth muscle?

Answer 2

It cause vasodilation

Question 3

What is the type of receptor for the radial muscle of the iris?

What is the hormone that binds to the receptor and what is its effect?

Answer 3

A-Adrenergic

2) Norepinephrine; dilation of the pupil

Question 4

What type of receptor is located along the Ciliary Muscle of Lens?

What hormone binds to this receptor and what is its effect?

Answer 4

1) B2-Adrenergic Receptor

2) Epinephrine/ Norepinephrine; Relaxation of muscle/ Flattening of the Lens

Question 5

What type of receptors are located in the heart muscle that function in the sympathetic nervous system?

What hormone binds to these receptors and what is its function?

Answer 5

1) B1 & B2 Adrenergic Receptors

2) Epinephrine & Norepienephrine. Increase HR & Strength of Contraction

Question 6

What is the function of Alpha Receptors on vascular smooth muscle?

Answer 6

They cause contraction of vascular smooth muscle

Question 7

What is the function of Beta Receptors on vascular smooth muscle?

Answer 7

They cause relaxation of vascular smooth muscle

Question 8

Alteration of Alpha and Beta receptors has the most effect on what three structures/organs?

Answer 8

1) Skeletal muscle 2) Abdominal Organs 3) Kidneys

Question 9

What are the three structures/organs that only have alpha receptors?

Answer 9

1) Skin & Mucosa 2) Salivary Glands (dry mouth) 3) Brain

Question 10

What type of receptor does Bronchial Smooth Muscle possess?

What is the effect of a molecule binding to this receptor?

Answer 10

1) B2 Receptor

2) Smooth Muscle Relaxation, Bronchiodilation

Question 11

What is the effect of a A1 Receptor agonist molecule binding on bronchial smooth muscle?

Answer 11

1) Decrease of bronchial secretion

Question 12

What is the effect of a B2 receptor agonist binding on bronchial smooth muscle?

Answer 12

Increases secretion

Question 13

Rescue inhalers Mechanism of action includes acting on what type of receptors and in what tissue?

Answer 13

1) Type B2 Receptors 2) Bronchial Smooth Muscle

Question 14

What type of receptors are present in the GI tract that play a role in the fight or flight response?

Also, what is their effect when stimulated?

Answer 14

A1 and Beta receptors

2) Decrease Motility

Question 15

What is the effect of an agonist molecule binding to a A2 receptor in the GI system?

Answer 15

Decrease in secretion

Question 16

What is the effect of an agonist molecule binding to A1 and B2 receptors in the liver?

Answer 16

Increase in Glyocogenolysis; Liver

Question 17

What is the effect of a agonist molecule binding to A1, B1, and B3 receptors in Adipose Tissue?

Answer 17

Increase in Lipolysis

Question 18

What is effect of an agonist molecule binding to an A1 receptor in the GI system?

Answer 18

Increase in sphincter tone

Question 19

Parasympathetic fibers in CN III go where?

Answer 19

Pupillary sphincter and ciliary muscle of the eye

Question 20

Parasympathetic fibers from CN VII innervate what?

Answer 20

Lacrimal, Nasal, and Submandibular glands

Question 21

Parasympathetic fibers from CN IX innervate what?

Answer 21

Parotid gland

Question 22

Sacral group of parasympathetic nerve fibers has what function?

Answer 22

Supplies nerve signals to external genitalia to cause erections

Question 23

Sympathetic nerve fibers from cord segment T1 generally pass where?

Answer 23

Into the head

Question 24

Sympathetic nerve fibers from the cord segment T2 terminate where?

Answer 24

In the neck

Question 25

Sympathetic nerve fibers that terminate in the Thorax originate from where?

Answer 25

T3, T4, T5, and T6