03- Intro to PNS

Question 1

Autonomic Nervous System

Answer 1

provides unconscious and involuntary control for heart, blood vessels, visceral organs, and glands
-made of Parasympathetic and sympathetic branches

Question 2

Somatic Nervous System

Answer 2

provides conscious and voluntary control of skeletal muscle

Question 3

Acetylcholine (ACh)

Answer 3

a primary neurotransmitter of the autonomic nervous system released by:

• all pre-ganglionic nerves
• post-ganglionic Para- nerves
• some post-ganglionic sympa- nerves (50% sweat glands)
• all somatic nerves

Question 4

Norepinephrine (NE)

Answer 4

a primary neurotransmitter of the autonomic nervous system that is released by most post-ganglionic sympathetic nerves

Question 5

Dopamine

Answer 5

released by some post-ganglionic sympathetic nerves (smooth muscle of renal vasculature)

Question 6

Co-Transmitters

Answer 6

Packaged and released with primary NTMs into synapse.

• may elicit faster or slower responses that modulate action of primary NTM
• may play role in feedback inhibition at nerve terminals
• may function as primary transmitter in non-cholinergic/non-adrenergic nerves
• eg. purines (adenosine, ATP), peptides (Cholecystokinin, somatostatin, supstance p), and NO