nervous system

Question 1

what are the two primary cells of the nervous system?

Answer 1

neurons and glial cells

Question 2

what is the function of the nervous system?

Answer 2

carry info thru the body; sends and receives signals

Question 3

what does the neuron cell do?

Answer 3

carry and store info

Question 4

what does the glial cell do

Answer 4

support the neurons

Question 5

What protects the brain?

Answer 5

skull, meninges and cerebrospinal fluid

Question 6

what is the difference between sensory and motor neruons?

Answer 6

sensory - receive signals
motor - respond to signals

Question 7

how many neurons are found in the human body?

Answer 7

billions

Question 8

what is a neurotransmitter?

Answer 8

chemicals that pass msgs between 2 neurons

Question 9

give examples of neurotransmitters?

Answer 9

serotonin

Question 10

why would someone with nerve damage may not show sweat from the body part the nerve damage occured?

Answer 10

the nerve wont send signal so nothing will happen

Question 11

CNS parts

Answer 11

brain, spinal cord, eye retina, 31 segments of spinal cord, and a pair of spinal nerves extends from each part

Question 12

PNS parts

Answer 12

sensory neurons (43 pairs) and motor neurons, somatic - voluntary nervous system, autonomic - involuntary nervous system (sympathetic- fight or flight, parasympathetic - rest and digest)

Question 13

what is neuron made of?

Answer 13

cell body, dendrites, axon, axon terminals

Question 14

neurotmesis

Answer 14

complete loss of function and ability of nerve te send impulse due to tearing, stretching, bruising

Question 15

axonotmesis

Answer 15

nerve is placed under too much pressure and is crushed. axon is damaged and cant send impulses, but can regenerate after months or years

Question 16

neurapraxia

Answer 16

least severe, resulting from constant pressure or lack of blood supply to nerve