NERVOUS SYSTEM PT 3 - STRUCTURE/FUNCTION/SUBDIVISIONS OF PNS

Question 1

What is a Posterior/Dorsal Root Ganglion?

Answer 1

A swelling in the posterior root containing cell bodies of sensory neurons of the PNS

Question 2

What is the Somatic Nervous System (SNS) is known as?

Answer 2

The ‘voluntary nervous system’

Question 3

What is the function of the sensory neurons in the ENS (Enteric Nervous System)?

Answer 3

Monitors chemical changes and stretching the walls within the GI Tract.

Question 4

Explain the process of repair in the PNS.

Answer 4

Dendrites and myelinated axons damage can be repaired if cell body is intact and Schwann cells are active.

Question 5

Where does the nervous system receive its glucose?

Answer 5

From BLOOD or NEUROGLIAL CELLS

Question 6

What CT layer is the Endoneurium, and what does it cover?

Answer 6

Innermost layer covering the axon

Question 7

Which structure in the brain plays the major control and integration centre for the ANS?

Answer 7

Hypothalamus

Question 8

Which structures are involved in the path of communication of the Cranial Nerves?

Answer 8

Between the brain and the periphery

Question 9

Which structures are involved in the path of communication of the Spinal Nerves?

Answer 9

Between the spinal cord and periphery

Question 10

What is a Nerve Root?

Answer 10

Two bundles of axons connecting the SPINAL NERVE to the SPINAL CORD

Question 11

Which ‘root’ of the spinal nerve do MOTOR AXONS travel through?

Answer 11

Anterior/Ventral Root

Question 12

What is the function of the Autonomic Nervous System (ANS)?

Answer 12

Automatically monitors and controls body activities

Question 13

What are the 2 divisions of the ANS?

Answer 13

• Sympathetic Nervous System (SyNS)

- Parasympathetic Nervous System (PaNS)

Question 14

How many pairs of spinal nerves are present?

Answer 14

31 pairs

Question 15

Explain the Parasympathetic Nervous System (PaNS.

Answer 15

The ‘rest and digest’ system. Restores energy systems

Question 16

What CT layer is the Perineurium, and what does it cover?

Answer 16

Middle layer covering fascicles

Question 17

C1 - C7 exit the spine _____ their corresponding vertebra

Answer 17

Above

Question 18

C8 exits _______ C7 and T1 vertebra

Answer 18

Between

Question 19

The ‘Atlas’ of the spinal nerves is also known as?

Answer 19

Known as C1. Site where the 1st cervical nerves emerge from the spinal cord

Question 20

What is the function of Motor Neurons in the Somatic Nervous System?

Answer 20

Motor neurons conduct impulses from the CNS to skeletal muscles only

Question 21

The effects of sympathetic stimulation last _______ than the effects of parasympathetic stimulation.

Answer 21

Longer

Question 22

There are ___ pairs of cranial nerves exiting from the _____ of the _____.

Answer 22

• 12 pairs

- Base of the brain

Question 23

What is the function of the motor neurons in the ENS (Enteric Nervous System)?

Answer 23

Controls the contractions and secretions of the GI Tract

Question 24

The fascicles of the spinal nerve is defined as?

Answer 24

A bundle of axons

Question 25

What CT layer is the Epineurium, of the Spinal Nerve?

Answer 25

Outermost layer

Question 26

Explain the Sympathetic Nervous System (SyNS).

Answer 26

The ‘fight or flight’ system. Activates high sympathetic activity (i.e. threats/panic)

Question 27

What is the function of the Sensory Neurons in the Somatic Nervous System?

Answer 27

Sensory neurons convey information to the CNS

Question 28

Explain the process of repair in the CNS.

Answer 28

Little or no repair if damaged neurons

Question 29

T1 - L5 exit _____ their corresponding vertebra

Answer 29

Below

Question 30

Which ‘root’ of the spinal nerve do SENSORY AXONS travel through?

Answer 30

Posterior/Dorsal Root