Chapter 9 : Nervous System (part 2)

Question 1

Schwann Cells

Answer 1

Wrap around axons and produce myelin

Question 2

Microgial cells

Answer 2

Scavenger that phagocytize matter in the CNS (like WBCs)

Question 3

Oligodendrocytes

Answer 3

Form myelin within the CNS

Question 4

Astrocytes

Answer 4

Join a number of tissues and give structural support

Question 5

Ependymal

Answer 5

Form epithelial like membranes around specialized parts of the CNS

Question 6

Polarized

Answer 6

Unequal distribution of + and - ions across a cell membrane

Question 7

Threshold Potential

Answer 7

Amount of stimulation needed for nerve impulse to occur

Question 8

Action Potential

Answer 8

When threshold is met; a series of electrochemical changes sweeps along the axon like a wave

Question 9

Synapse

Answer 9

Place where an impulse from one nerve cell is communicated to another nerve cell

Question 10

Synaptic nerve

Answer 10

Gap between 2 neurons

Question 11

Neurotransmitter

Answer 11

Impulses traveling from one neuron to another

Question 12

Reflex arc

Answer 12

Sensory, motor, and interneurons that work together to produce a simple response or a reflex

Question 13

Brain subdivisions

Answer 13

Cerebrum
Diecephalons
Brain stem
Cerebellum

Question 14

Meringes

Answer 14

3 continuous layers of membranes that cover and protect the brain and spinal cord

Question 15

Dura Mater

Answer 15

The most superficial of the meningeal layers that surrounds the brain made from though white fibrous connective tissue
“leathery”

Question 16

Arachnoid Mater

Answer 16

Middle meningeal layer made of thin “spider web” like epithelial membrane with spaces that hold nerebrospinal fluid

Question 17

Cerebrospinal Fluid (CSF) structure

Answer 17

Fluid that surrounds the brian/spinal cord and fills in spaces with in the brain

Question 18

Cerebrospinal Fluid (CSF) function

Answer 18

Absorbs shock, “float” the brain, and acts as the “blood brain barrier” the transports oxygen and nutrients to the brain tissue and removes waste

Question 19

Subarachnoid Space

Answer 19

Small spaces that contains the CSF

Question 20

Pia Mater

Answer 20

the delicate innermost layer of meninges that contain many blood vessels