Nervous System

Question 1

functions of nervous system

Answer 1

is to detect impulses from the senses; control center of the body

Question 2

major organs of nervous system

Answer 2

brain
spinal cord
senses
nerves

Question 3

difference between neurons and neuroglia

Answer 3

neurons( make up 10% of nervous system)

neuroglia (nerved glue, make up 90% of nervous system)

Question 4

dendrite

Answer 4

receive the nerve impulses from the senses or another neuron

Question 5

soma

Answer 5

body of the neuron that holds the nucleus

Question 6

Schwann cells

Answer 6

create myelin sheets

Question 7

node of ranvier

Answer 7

impulses jump from node to node, which increase speed of impulse

Question 8

myelin

Answer 8

insulates the axon. produced by Schwann cells

Question 9

axon

Answer 9

passageway for nerve impulses after cell body; end in axon terminal

Question 10

axon terminal

Answer 10

the button like endings of axons through which axons make contact with other nerve

Question 11

CSF

Answer 11

between the arachnoid layer and the pia mater is the cerebrospinal fluid

Question 12

Cerebrum

Answer 12

largest part of the brain

divided into 2 hemispheres

Question 13

4 Lobes of Cerebrum

Answer 13

frontal lobe
parietal lobe
temporal lobe
occipital lobe

Question 14

Thalamus

Answer 14

2 bulb shaped halves in the center of the brain

relays sensory impulses to the cerebral cortex for processing and sorting

Question 15

Hypothalamus

Answer 15

controls hormones released by pituitary gland

responsible for automatic processes

Question 16

brainstem

Answer 16

located between the cerebrum and spinal cord

Question 17

3 regions of brainstem

Answer 17

midbrain
pons
medulla oblongata

Question 18

cerebellum

Answer 18

second largest part of brain
responsible for coordinating the movements directed by the cerebrum
involuntary movements
aids in muscle memory

Question 19

spinal cord

Answer 19

extends from medulla oblongata
31 parts of spinal nerves branch out from spinal cord
relays impulses from the pns to the brain

Question 20

midbrain

Answer 20

(mesencephalon)
relays info to cerebrum
controls body movements and postures

Question 21

pons

Answer 21

the bridge
almost completely made of white matter that links cerebral cortex and cerebellum
carries info from one side of the brain to the other
controls breathing

Question 22

medulla oblongata

Answer 22

located above spinal cord
transmits impulses between spinal cord and brain
controls blood pressure, heart rate, swallowing, coughing

Question 23

mechanoreceptors

Answer 23

touch

Question 24

thermoreceptors

Answer 24

temperature variations

Question 25

pain receptors

Answer 25

pain

Question 26

chemoreceptors

Answer 26

chemicals

Question 27

photoreceptors

Answer 27

light

Question 28

papillae

Answer 28

the bumps on tongue- tastebuds

Question 29

malleus

Answer 29

hammer

Question 30

incus

Answer 30

anvil

Question 31

stapes

Answer 31

stirrup

Question 32

cochlea

Answer 32

a bone snail-shaped structure containing membranes filled with fluid

Question 33

cornea

Answer 33

is made of thick, transparent tissue. allows light into eye

Question 34

pupil

Answer 34

is the opening in the center of the iris. muscles regulate the amount of light entering eye

Question 35

IRIS

Answer 35

is located behind the cornea. colored part of eye

Question 36

retina

Answer 36

located in the back of the eye, contains thousands of photoreceptors

Question 37

lens

Answer 37

is a semi solid disc that directs light waves towards retina

Question 38

farsighted

Answer 38

eyeball is too short. can see far

Question 39

nearsided

Answer 39

can see close

Question 40

dont yell at me im missing one somewhere

Answer 40

ur the best man