Autonomic nervous system Flashcards Preview

Foundations of Neuroscience > Autonomic nervous system > Flashcards

Flashcards in Autonomic nervous system Deck (17):
1

What are autonomic sensory components?

Receptors
Viscera
Not consciously perceived e.g. baroreceptors
Somatosensory
External environment

2

What do autonomic motor nerves innervate?

Smooth muscle
Cardiac muscle
Glands

3

What are the divisions of the autonomic nervous system?

Parasympathetic
Sympathetic

4

What is different in the organisation of autonomic and somatic motor neurones?

Somatic has 1 neurone between CNS and effector
Autonomic has 2 neurones between CNS and effector

5

What are the two nerves in an autonomic motor pathway?

Pre ganglionic
Post ganglionic

6

What are the neurotransmitters of the sympathetic nervous system?

Ach and NA

7

What are the neurotransmitters of the parasympathetic nervous system?

Ach and Ach

8

What is an exception to the neurotransmitter rule?

Sweat glands innervated by the sympathetic nervous system are only Ach
The adrenal medulla is innervated by one sympathetic neurone not two

9

What is a brief summary of the sympathetic and parasympathetic nervous system?

Sympathetic: alert and active
Parasympathetic: rest and digest

10

Are organs innervated by the sympathetic or parasympathetic?

Both
Antagonists of one another

11

Describe autonomic innervation of the heart

SNS: increases heart rate
PNS: decreases heart rate

12

Describe innervation of the stomach

SNS: decreases motility
PNS: increases motility

13

Describe innervation of the pupil

SNS: contraction of radial muscle dilates the pupil
PNS: contraction of circular muscle constricts the pupil

14

What is only innervated by the sympathetic nervous system?

Sweat glands
Most blood vessels

15

What is the effect of the sympathetic nervous system on most blood vessels?

More activity = vasoconstriction
Less activity = vasoldilation

16

What is the effect of the sympathetic nervous system on blood vessels of skeletal muscle and the heart?

Vasodilation only

17

How do blood vessels of the head and reproductive organs respond to the autonomic nervous system?

SNS: vasoconstriction
PNS: vasodilation