Nervous System

Question 1

Nervous System

Answer 1

The master controlling and communicating system of the body.

Question 2

Sensory input

Answer 2

Gathered information

Question 3

Integration

Answer 3

makes decisions about what should be done at each moment.

Question 4

Central nervous system

Answer 4

the brain, and spinal cord which occupy the dorsal body cavity.

Question 5

Peripheral nervous system

Answer 5

the part of the nervous system outside the CNS. mainly consists of the nerves leaving the brain.

Question 6

afferent

Answer 6

consists of nerve fibers that convey impulses to the CNS from sensory receptors.

Question 7

efferent

Answer 7

carries impulses from the CNS to the effector organs the muscles and the glands.

Question 8

somatic nerve system

Answer 8

allows us to consciously control our skeletal muscles.

Question 9

Automatic Nervous system

Answer 9

regulates events that are automatic or involentary.

Question 10

neuroglia

Answer 10

cells that generally support, isulate, and protect the deicate neurons.

Question 11

Astrocytes

Answer 11

star shaped cells that account for nearly half of the neural tissue.

Question 12

Microglials

Answer 12

spiderlike phagocytes that dispose of debris including dead brain cells, and bacteria.

Question 13

ependymal cells

Answer 13

these line the cavities of the brain and spinal cord.

Question 14

oligodendrocytes

Answer 14

wrap their flat extensions tightly around the nerve fibers.

Question 15

Schwann cells

Answer 15

Axons outside the CNS

Question 16

satellite cells

Answer 16

are precursors to skeletal muscle cell.

Question 17

neurons

Answer 17

a specialized cell transmitting nerve impulses; a nerve cell.

Question 18

dendrites

Answer 18

generate nerve impulses.

Question 19

axons

Answer 19

conducts nerve cells away from the body

Question 20

axon hillock

Answer 20

coneike region of the cell body.

Question 21

axon terminals

Answer 21

contain hundreds of tiny vessels.

Question 22

myelin

Answer 22

fibers convered with fatty material

Question 23

myelin sheath

Answer 23

tight coil wrapped membranes.

Question 24

nodes of Ranvier

Answer 24

gaps in schwann cells.

Question 25

depolarization

Answer 25

As the sodium rushes back into the cell the positive sodium ions raise the charge inside of the cell from negative to positive

Question 26

action potential

Answer 26

is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory.

Question 27

repolarization

Answer 27

refers to the change in membrane potential that returns it to a negative value

Question 28

cerebrum

Answer 28

anterior part of the skull.

Question 29

parietal lobe

Answer 29

The parietal lobe is positioned above the occipital lobe

Question 30

frontal lobe

Answer 30

at the front of the brain,

Question 31

occipital lobe

Answer 31

is the visual processing center

Question 32

temporal lobe

Answer 32

is located beneath the lateral fissure

Question 33

gray matter

Answer 33

the darker tissue of the brain and spinal cord,

Question 34

cerebral white matter

Answer 34

lighter tissue of the brain

Question 35

cerebellum

Answer 35

the part of the brain at the back of the skull in vertebrates. Its function is to coordinate and regulate muscular activity.