nervous system

Question 1

nervous system

Answer 1

complex system of nerve cells that carries information to and from the brain and spinal cord to muscles, organs, and glands with the body

Question 2

serves 3 principal functions

Answer 2

sensory input
integration
motor output

Question 3

sensory neurons

Answer 3

bring in info from the outside world and send it to the spinal cord

Question 4

chemoceptors

Answer 4

smell and taste

Question 5

mechanoreceptor

Answer 5

touch, pressure, stertch

Question 6

photoreceptors

Answer 6

light

Question 7

thermoreceptors

Answer 7

heat

Question 8

nociceptors

Answer 8

pain

Question 9

auditory receptors

Answer 9

sound

Question 10

alges

Answer 10

pain

analgesic

Question 11

motor output

Answer 11

the brain decides to act and sends signals to muscles and/or glands with instructions on what to do

Question 12

sensory neurons

Answer 12

eyes, ears and other sense organs

Question 13

connector/interneurons

Answer 13

connect various neurons within the brain and spinal cord

Question 14

motor

Answer 14

carry impulses from the brain and spinal cord to muscles and glans

Question 15

the nervous system is divided into ___ main parts

Answer 15

2

Question 16

central nervous system (CNS)

Answer 16

brain and spinal cord

Question 17

peripheral nervous system (PNS)

Answer 17

all other nerves in the body

Question 18

central nervous system

Answer 18

consists of brain and spinal cord which are protected by the skeletal system

Question 19

3 meningeal layers of the CNS

Answer 19

dura mater - tough, outer layer
arachnoid - middle, less dense, web like appearance
pia mater - innermost, thin, compact

Question 20

brain contains about ___ neurons

Answer 20

85-100,000,000,000 neurons

Question 21

the brain

Answer 21

protected by many layers

Question 22

canine and feline brains

Answer 22

not as developed as primates

Question 23

mature at a faster rate

Answer 23

from birth

Question 24

spinal cord

Answer 24

extension of the brain that is encased in the vertebrae

Question 25

sensation recieved by sensory nerves transmitted to

Answer 25

spinal cord

Question 26

transmitted either go to brain or to motor nerves where it

Answer 26

produces an action

Question 27

PNS

Answer 27

all the nervous tissue in your body that isnt your brain or spinal cord

Question 28

PNS is divided further into other categories based on

Answer 28

function

Question 29

sensory division

Answer 29

picks up stimuli and communicates this info to the brain | afferent - signal is traveling toward the brain

Question 30

motor division

Answer 30

sends info from the brain to the muscles and glands | efferent - signal is travelling away from the brain to muscle and gland

Question 31

somatic nervous system

Answer 31

allows for voluntary control of muscles

Question 32

autonomic

Answer 32

involuntary control of muscles | heartbeat, breathing, digestion

Question 33

sympathetic division

Answer 33

gets the body excited (fight or flight)

Question 34

parasympathetic division

Answer 34

helps the body to calm down and relax

Question 35

signal pathway step by step

Answer 35

sensory neurons use sensory input to bring information to the body the signal travels up the pathway toward the spinal cord (afferent) from spinal cord up to the brain (interneurons) the brain process that info (integration) and decides what to do if action is to be taken, motor output sends a signal tto the target muscles or glands using motor neurons (efferent)