introduction to neuroanatomy

Question 1

functiosn of the nervous ystem

Answer 1

sensory, integretive, motor

Question 2

anatomical divisons of the nervous system

Answer 2

cns : braina nd spinal cord ( controla nd integretive center)
pns nervous system outside the cns
consists of 31 spinal nerves : carries info to and from the spinal cord
12 cranial : carries info to and from the brain

Question 3

sesnory divison afferent function

Answer 3

conduct impulses from the sesnory receptors to the cns

Question 4

motor division efferent function

Answer 4

conduct impulses from the cns to theffecctors ( muscles/glands)

Question 5

somatic nervous ystem

Answer 5

voluntary condyct impulses form he cns to the skeletel muscles

Question 6

ans function

Answer 6

involuntary conduct impulses form the cns to smooth muscle , cardiac muscles

Question 7

divisiosn of ans

Answer 7

sympathetic and parasympathetic

Question 8

neurons description

Answer 8

the functional unit of the nervous system
neurons are excitab;le cells with specalized reception of stimuli and can generate nerve impulse
neurons vary in shape and size but each has a cell body, dendrites and an axon
neurons are present in the brain spinal cord and ganglia

Question 9

dendrites function

Answer 9

carry nerve impulse towards the cell body

Question 10

axons fumction

Answer 10

carry nerve impulses away from the cell body

Question 11

what is a synapse

Answer 11

site of communication between two or more neurons using chemical neurotransmitter

Question 12

myelin sheath

Answer 12

increases conduction velocity
made of lipoprotein

Question 13

multipolar neuron descripotion

Answer 13

usually have sveral dendrites and one axon
motor neuron

Question 14

bipolar neuron

Answer 14

usually have one main dendrite and one axon
the retina of the eye

Question 15

unipolar neuron

Answer 15

sesnory neuron

Question 16

clusters of neuronal cell bodies found in the pns are called

Answer 16

ganglion or ganglia

Question 17

clusters of neuronal cell bodies found in the cns

Answer 17

nucleus or nuclei

Question 18

bundles of axons found in teh pns are aclled

Answer 18

nerves

Question 19

bundles of axons found in the cns are called

Answer 19

tracts

Question 20

white and grey mstter

Answer 20

mylinated axons are found in the white matter givibg it its color distinguishing it from the grey matter ( neuronal cell bodies)

Question 21

myelinated nerve fibers

Answer 21

surronded by a myelin sheath formed by a suporting cell
in the cns it is called the oligodendrocyte
in the pns its called teh schwan cell
myelin sheatsh begin to form before birth and the first year postnatally

Question 22

glial cells / supporting cells in the cns

Answer 22

astrocyte ( macroglial)
microglial
ependymel
oligodendrocyte

Question 23

glial cell / supporting cell of teh pns

Answer 23

schwann cell