Chapter 13

Helpfulness: 0
Set Details Share
created 4 years ago by Sharron1168513
239 views
Professor F. Scott MCC Unit 2 Exam Nervous System
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

In the spinal cord explain the location, shape and components of grey matter.

The grey matter, in the center of the cord, is shaped like a butterfly and consists of cell bodies of interneurons and motor neurons, as well as neuroglia cells and unmyelinated axons.

2

Dorsal roots and__________ come together and exit the intervertebral foramina as they become spinal_____________.

Ventral roots; nerves

3

What are microglial cells

cells that destroy pathogens in the central nervous system

4

what are blood capillaries of the brain surrounded by

astrocytes

5

what is the blood brain barrier BBB

filtering mechanism of the capillaries that carry blood to the brain and spinal cord tissue, blocking the passage of certain substances.

6

Characteristics of the CSF

It is produced in the choroid plexuses of the ventricles of the brain. It acts as a cushion or buffer for the brain's cortex, providing basic mechanical and immunological protection to the brain inside the skull.

7

The myelin sheaths in the CNS are made up of

oligodendrocytes

8

Absolute Refractory period

. This is the time during which another stimulus given to the neuron (no matter how strong) will not lead to a second action potential.

9

The Refractory period (relative refractory period)

the period shortly after the firing of a nerve fiber when partial repolarization has occurred and a greater than normal stimulus can stimulate a second response—called also relative refractory phase

10

Cerebral spinal fluid is produced by what kind of cell and where

Ependymal cells; choriod plexus

11

The resting membrane is maintained in the neuron by what mechanism

The sodium potassium pump

12

Produce myelin sheaths in the CNS

oligodendrocytes

13

nerve fibers that carry pain impulses to the spinal cord have their cell bodies

...

14

produce myelin sheaths in the PNS

schwann cells and neurilimocytes