Module D Study Guide

Question 1

Peripheral Nervous System (PNS)?

Answer 1

Nervous system outside brain and spinal cord

Question 2

What are the main branches of the efferent branch of the PNS?

Answer 2

Somatic and Autonomic

Question 3

6) What is the autonomic nervous system responsible for? What are its three main branches?

Answer 3

• Involuntary branch of peripheral efferent division

- Parasympathetic, sympathetic, and enteric

Question 4

7) What are the structural similarities and differences between the parasympathetic and sympathetic nervous systems? Think about – where nerves leave the spinal cord, location of ganglia, structure of preganglionic and postganglionic neurons.

Answer 4

1

Question 5

8) What are the physiological similarities and differences between the parasympathetic and sympathetic nervous systems? Think about neurotransmitters (both synapses), receptors (both synapses)

Answer 5

1

Question 6

9) Why is it useful to have most organs/tissues dually innervated by sympathetic and parasympathetic nervous systems?

Answer 6

Precise control

Question 7

10) What happens when the sympathetic nervous system synapses on chromaffin cells of the adrenal medulla?

Answer 7

1

Question 8

11) What portions of the central nervous system help regulate the activity of the autonomic nervous system?

Answer 8

1

Question 9

Somatic Nervous System

Answer 9

Voluntary control

Question 10

Autonomic Nervous System

Answer 10

Involuntary e.g. stomach muscles

Question 11

Parasympathetic

Answer 11

• Cranial and sacral areas of CNS

- Long preganglionic; short postganglionic

Question 12

Sympathetic

Answer 12

-Originate in the lateral horn (thoracic and lumbar)
-Short preganglionic; long postganglionic
-

Question 13

Cholinergic fibers

Answer 13

All autonomic preganglionic

Question 14

Adrenergic fibers

Answer 14

Most sympathetic postganglionic