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

T1 PHYSIOLOGY > NERVOUS SYSTEM PT 3 - STRUCTURE/FUNCTION/SUBDIVISIONS OF PNS > Flashcards

Flashcards in NERVOUS SYSTEM PT 3 - STRUCTURE/FUNCTION/SUBDIVISIONS OF PNS Deck (30):
1

What is a Posterior/Dorsal Root Ganglion?

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

2

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

The 'voluntary nervous system'

3

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

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

4

Explain the process of repair in the PNS.

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

5

Where does the nervous system receive its glucose?

From BLOOD or NEUROGLIAL CELLS

6

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

Innermost layer covering the axon

7

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

Hypothalamus

8

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

Between the brain and the periphery

9

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

Between the spinal cord and periphery

10

What is a Nerve Root?

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

11

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

Anterior/Ventral Root

12

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

Automatically monitors and controls body activities

13

What are the 2 divisions of the ANS?

- Sympathetic Nervous System (SyNS)
- Parasympathetic Nervous System (PaNS)

14

How many pairs of spinal nerves are present?

31 pairs

15

Explain the Parasympathetic Nervous System (PaNS.

The 'rest and digest' system. Restores energy systems

16

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

Middle layer covering fascicles

17

C1 - C7 exit the spine _____ their corresponding vertebra

Above

18

C8 exits _______ C7 and T1 vertebra

Between

19

The 'Atlas' of the spinal nerves is also known as?

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

20

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

Motor neurons conduct impulses from the CNS to skeletal muscles only

21

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

Longer

22

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

- 12 pairs
- Base of the brain

23

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

Controls the contractions and secretions of the GI Tract

24

The fascicles of the spinal nerve is defined as?

A bundle of axons

25

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

Outermost layer

26

Explain the Sympathetic Nervous System (SyNS).

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

27

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

Sensory neurons convey information to the CNS

28

Explain the process of repair in the CNS.

Little or no repair if damaged neurons

29

T1 - L5 exit _____ their corresponding vertebra

Below

30

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

Posterior/Dorsal Root