The Autonomic Nervous System

Question 1

Efferent?

Answer 1

Motor

Question 2

Afferent?

Answer 2

Sensory

Question 3

Name to efferent divisions of PNS.

Answer 3

Autonomic
Somatic

Question 4

Describe the pre and post ganglionic fibres of sympathetic nerves.

Answer 4

Pre- short
Post- long

Question 5

Which type of outflow do sympathetic nerves have?

Answer 5

Thoracolumbar outflow

Question 6

Where are sympathetic ganglia located?

Answer 6

Prevertebral ganglia
Paravertebral ganglia

Question 7

Which level is the sympathetic outflow from?

Answer 7

T1-L2

Question 8

From which cranial nerves does parasympathetic outflow come from?

Answer 8

III, VII, IX, X

(oculomotor, facial, glossopharyngeal, vagus)

Question 9

Which level is the parasympathetic outflow from?

Answer 9

S2-4

Question 10

Describe the pre and post ganglionic fibres of parasympathetic nerves.

Answer 10

Pre-long
Post-short

Question 11

In the sympathetic nervous system, which type of synapses are between the pre and post-ganglionic cells?

Answer 11

Cholinergic and nicotinic

Question 12

In the parasympathetic nervous system, which type of synapses are between the pre and post-ganglionic cells?

Answer 12

Cholinergic and nicotinic

Question 13

In the parasympathetic nervous system, which type of synapses are between the post-ganglionic cells and their targets?

Answer 13

Cholinergic and muscarinic

Question 14

What does adrenaline and noradrenaline act on?

Answer 14

Alpha or beat adrenergic receptors

Question 15

What does acetylcholine bind to?

Answer 15

Nicotinic receptors on postganglionic cells
Muscarinic receptors on target

Question 16

What does noradrenaline bind to?

Answer 16

Alpha or beat adrenergic receptors

Question 17

In the eye, what does activation of the sympathetic SN cause to the radial and ciliary muscle?

Answer 17

Contraction o radial muscle of iris
Relaxation of ciliary muscle surrounding lens

Question 18

Which type of receptor are activated on the radial muscle in sympathetic innervation?

Answer 18

Alpha 1 receptors

Question 19

Which type of receptor are activated on the radial muscle in parasympathetic innervation?

Answer 19

Muscarinic receptors

Question 20

Which type of receptor are activated on the ciliary muscle in sympathetic innervation?

Answer 20

Beta 2 receptors

Question 21

Which type of receptor are activated on the ciliary muscle in parasympathetic innervation?

Answer 21

Muscarinic receptors

Question 22

What may eye drops used to dilate pupil of the eye contain?

Answer 22

Muscarinic antagonist
Alpha 1 agonist

Question 23

What does parasympathetic innervation cause to happen in the heart?

Answer 23

Release of acetylcholine
Decrease in HR

Question 24

In blood vessels, was does sympathetic activation cause?

Answer 24

Vasoconstriction

Question 25

However, in some blood vessels, activation of sympathetic NS causes vasodilation. Why?

Answer 25

They express Beta 2 receptors ->just watch this lecture again before exam for revision

Question 26

What happens when there is activation of the sympathetic NS in the lungs?

Answer 26

Relaxation of smooth muscle