Nervous system

Question 1

function of nervous system

Answer 1

detect impulses from the sense

Question 2

major organs of nervous system

Answer 2

brain
spinal cord
senses
nerves

Question 3

neuron v neuroglia

Answer 3

neuron- makes up 10% of nervous systme

neuroglia- nerve-glue 90% of nervous system

Question 4

dendrite

Answer 4

receive the nerve impulses from the sense or another neuron

Question 5

soma

Answer 5

body of the neuron that holds the nucleus

Question 6

schwann cells

Answer 6

make myelin sheath

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

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 axon through which axons make contact with other nerve cells

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 spheres, controls conscious activities

Question 13

frontal lobe

Answer 13

voluntary movements, reasoning and decision making, memory, ability to predict consequences of actions, planning, verbal communication

Question 14

parietal lobe

Answer 14

sensations, visual-spatial processing and body position

Question 15

occipital lobe

Answer 15

visual processing and memory of objects

Question 16

temporal lobe

Answer 16

memory, comprehension and pronunciation of words, small and sound, emotional association with memories

Question 17

Thalamus

Answer 17

relays sensory impulses to the cerebral cortex for processing and sorting

Question 18

Hypothalamus

Answer 18

controls hormones released by pituitary gland, responsible for autonomic process

Question 19

Brainstem

Answer 19

between cerebrum and spinal cord

Question 20

midbrain

Answer 20

relays info to cerebrum, controls body, movements and postures

Question 21

pons

Answer 21

carries signals from both sides of the brain

Question 22

medulla oblongata

Answer 22

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

Question 23

cerebellum

Answer 23

responsible for coordinating the movements directed by the cerebrum so that they are graceful and efficient

Question 24

spinal cord

Answer 24

relays impulses from the PNS to the brain

Question 25

Mechanoreceptors

Answer 25

touch

Question 26

Thermoreceptors

Answer 26

temperature variations

Question 27

Pain receptors

Answer 27

pain

Question 28

Chemoreceptors

Answer 28

chemicals

Question 29

Photoreceptors

Answer 29

light

Question 30

papillae

Answer 30

taste buds

Question 31

malleus-hammer

Answer 31

The structures of the ear all work together to collect and transfer sound vibrations to the auditory nerve.

Question 32

incus-anvil

Answer 32

The structures of the ear all work together to collect and transfer sound vibrations to the auditory nerve.

Question 33

stapes-stapes

Answer 33

The structures of the ear all work together to collect and transfer sound vibrations to the auditory nerve.

Question 34

Cochlea

Answer 34

a bony snail-shaped structure containing membranes filled with fluid.

Question 35

cornea

Answer 35

made of thick, transparent tissue

Function: allows light into the eye

Question 36

pupil

Answer 36

is the opening in the center of the iris

Function: muscles regulate the amount of light entering the eye

Question 37

iris

Answer 37

ocated behind the cornea. It is the colored part of the eye.
Function: works with pupil to regulate light entering the eye

Question 38

retina

Answer 38

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

Question 39

lens

Answer 39

semi-solid disc that directs light waves towards the retina.

Question 40

farsighted vs nearsighted

Answer 40

farsighted- eyeball is too short only see far away

nearsighted- only see close up