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Flashcards in Nervous system Deck (60)
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1

central nervous system

brain and spinal cord

2

peripheral nervous system

all nervous tissue outside the CNS

3

receptors

light
sound
touch
chemicals

4

effectors

skeletal muscle
smooth muscle
cardiac muscle
glands

5

support neurons, no impulse generation/transmission

neuroglia

6

phagocytic- immune and housekeeping functions

microglia

7

wrap axons in myelin in CNS

oligodentrocytes

8

wrap axons in myelin in PNS

Scwann cells

9

epithelial-like, line canals and cavities

ependymal cells

10

wrap capillaries, control environment of neurons

astrocytes

11

specialized for communication and transmit electrical impulses

neurons

12

cell body

perikaryon

13

typically one per cell and carry impulses away from the perikaryon

axon

14

typically many per cell and receive and transmit signals toward perikaryon

dendrites

15

1 process off perikaryon
splits into axon and dendrites

unipolar

16

2 process off perikaryon

bipolar

17

many process off perikaryon

multipolar neurons

18

in CNS a collection of axons traveling together

tract

19

in PNS a collection of axons traveling together

nerve

20

in CNS cluster of neuron cell bodies

nucleus

21

in PNS cluster of neuron cell bodies

ganglion

22

speeds impulse transmission along axons

myelin

23

gaps in myelin sheaths

nodes of ranvier

24

production of new neurons, repair of neurons

neurogenesis

25

at dendrites and perikaryon
stimulus dependent magnitude
local

graded potentials

26

along axons
all-or-none responses
long distance
reach synapses with other cells

action potentials

27

neurons that release chemcicals into blood

neurosecretory cells

28

forms information processing

convergence
divergence
inhibition

29

input from integument
output to skeletal muscles
relationship with outside world

somatic nerves

30

toward CNS
input
sensory

afferent