nervous system

Question 1

what does cerebrospinal do

Answer 1

protects and absorbs, supplies nutrients, and removes waste

Question 2

what are neurologia cells of the cns and 4 types

Answer 2

goal cells that protect neurons and make up half up of the nervous system )ependymal, astrocytes, oligodendrocytes, microglia)

Question 3

what cells help form the myelin sheath that surround axons

Answer 3

oligodenfrocytes

Question 4

what cells remove cellular debris and pathogens

Answer 4

microglia

Question 5

what are the 2 types of neuroglia of the pns

Answer 5

satellite cells and schwann cells

Question 6

what cells form enclosed segments of axons

Answer 6

schwann cells

Question 7

describe the stimulus

Answer 7

an electrical signal to which an organism response

Question 8

describe dendrites

Answer 8

The first part of the neuron to receive the stimulus or electrical signal

Question 9

describe the cell body

Answer 9

The spherical spot of the neuron which contains the nucleus and organelles

Question 10

describe the axon

Answer 10

it carries the message away from the cell body towards the terminal end fibers

Question 11

myelin sheath

Answer 11

The fatty tissue is surrounds an insulator the axon. It speeds up the transmission of the impulse

Question 12

terminal and fibers or axon terminals

Answer 12

they found the end of an axon and contain the vesicles

Question 13

Neuro transmitters

Answer 13

Chemical substances released by neurons to affect the membrane potential of another

Question 14

synapse

Answer 14

The space between each neuron

Question 15

five types of neurotransmitters

Answer 15

dopamine, serotonin, norepinephrine, acetylcholine, and morphine

Question 16

what are the two main divisions of the nervous system and what do they consist of

Answer 16

Central nervous system: consists of the brain and spinal cord
peripheral nervous system: consists of 12 pairs of cranial nerves and 31 pairs of spinal nerves

Question 17

why is a CNS neuron not usually replaced after it is injured

Answer 17

most neurons lacks centrioles and cannot divide

Question 18

what are efferent nerves

Answer 18

Carry messages from the brain and spinal cord to muscles and glands

Question 19

what are afferent nerves

Answer 19

Carrie messages from all parts of the body to the brain and spinal cord

Question 20

what is the autonomic nervous system? What are two divisions of the autonomic nervous system? Explain the difference between each of them

Answer 20

The autonomic nervous system is part of the peripheral nervous system division which helps to regulate control of involuntary body functions. The two main divisions are sympathetic and parasympathetic

Question 21

what is the somatic nervous system

Answer 21

part of the peripheral nervous system, helps to regulate control of voluntary body functions

Question 22

what is the largest part of the brain

Answer 22

cerebrum

Question 23

what is the surface of the cerebrum called? What are the grooves and elevations called

Answer 23

cerebral cortex. The grooves are called sulci and elevations are called gyri 

Question 24

which part of the brain contains the thalamus and hypothalamus

Answer 24

diencephalon

Question 25

what does the thalamus do

Answer 25

acts as the relay center of the brain and directs impulses to the cerebrum

Question 26

what does the hypothalamus do

Answer 26

regulates and controls the autonomic nervous system

Question 27

what is the mid-brain do

Answer 27

I and ear reflexes

Question 28

pons

Answer 28

middle part of brain stem

Question 29

medulla oblongata

Answer 29

lowest part of brain stem, it regulates heart rate respirations and blood pressure

Question 30

where does the spinal cord begin and end

Answer 30

begins below the medulla oblongata and end at the L1 or L2 vertebrae

Question 31

what are protective membranes of the brain and spinal cord called

Answer 31

meninges

Question 32

What are the three meninges 

Answer 32

The Dura Mater Dash the toughest an outer membrane or layer
The arachnid Noid membrane-The web like middle membrane or layer
pia mater -The innermost layer which contains blood vessels