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11th grade > Anat nervous > Flashcards

Flashcards in Anat nervous Deck (42):
1

nervous system

blood vessels, nueral tissue n CT

function: snesory, integrative, motor

2

neural tissue cells

neuron=nerve cell; react to changes in surrounding

neuroglial: maintains homeostasis, provide support/protection, form myelin

3

nerves

bundles of axons

4

sensory receptors

end of peripheral neuron provide sonsery function. convert info into nerve impusles-PNS-CNS

5

integrated

signals from senosry that r bought 2gether then decision are made by the person

6

motor functions

CNS- effectors (muscle & glands-secret when stimulated)

7

motor part of PNS

somatic and autonomuc nervous system

8

cell body

granualr cytoplasm, mitochondria, golgi, microtubule, only part that has ribosome

neurofibrils: fine thread extend into axon for support

9

chromatophilic substance (Nissl bodies)

in cytoplasm (rough ER in membranous packets)

10

replication

mature neurons don't divide, neural stem cells do

11

dendrites=many

axon: one
arises from axonal hillock
conduct impulse away from cell body

cytoplasm: many mitochondria, tubules, neurfibril NO RIBOSOMES

12

axon

branches: collateral
extensions w/ specialized endings: axon terminal.
official end: synaptic knob then synaptic ccleft (space)

13

axonal transport

vesicals, mitochondria, ions, nurtients, transmitters moving from cell body to ends of axon

14

schwann cells

PNS, encase large axon, lipids. layers of membrane around

15

nodes of ranvier

gaps in myelin shealth betw schwann cells

16

for smaller axon

PNS enclose in schwann but lack myeling shealth. lie in grooves

17

white matter

myelinated

18

oligodendrocyte

CNS nuroglial cells produce myelin
CNS myelinated axons lack neurilemmae
star shaped w/ few process, in row along myelinated axon
provide myelin for multiple cell at once

19

grey matter

unmyelinated axon n cell bodies

20

bipolar neurons

2 processes (1 axon, 1 dendrites)
eyes nose ears sensory

21

unipolar neurons

single process- 2 branches, single axon
1 branch (peripheral process) dendrites
other branch (central process) eneters brain/spinal cord
cell bodies form gnaglia sensory (most)

22

multipolar neurons

many process from cell bodies/ 1 axon, other dendrites
CNS
internueron motor

23

nterneurons association/internuncial

CNS
link btw other nuerons. part of CNS to another part of CNS

24

neuroglial cells in PNS

-Schwann
-Satellilte: support ganglia (clusters of cell bodies)

25

neuroglia CNS

astrocytes oligodendrocytes ependyma microglia

26

astrocytes

star shaped
btw neurons n bvesses support n hold structures together
aid metabolism
regulate concentration of ions
injury, form scar tossue in CNS
blood brain barrier

27

microglia

smallest w/ few proces CNS support, phagocytize stuff, proliferate when brian injury/disease

28

ependyma

cuboidal/colummnar/cilia inner lining of central canal in spinal cord, single layer cover ventricles n cover choroid plexuses

29

presynaptic neuron

bring impulse to synapse to stimulate postsynaptic neuron or effector
synaptic cleft: space that separates them

30

synaptic transmission

process of impulse in pre to post

31

nerve impulse axon-axon terminal

knobs: contain synaptic sac containing neurotransmitter
nerve impulse reach knob: voltage calcium channel O, Ca in. ^ in Ca inside cause vesicles to exocytos transmitters

32

action of transmitter on postsynaptic cell

excitatory: on -inhibitory: off

33

meninges

membranes located btw bone and nervous tissue, protect

outside
dura
arachnoid
pia
inside

34

dura mater

tought, white, dense CT, blood vessels n nerves, spearated from vertebare by epidural space (blood, loose CT, adipose)

35

arachnoid

thin, weblike, no blood,
beneath: subarachnoid space contain CSF

36

pia mater

very thin, nerve n blood vessl, follow contour

37

ventricles

filled w/CSF, continouse w/ central canal

-lateral
1st: left hemisphere
2nd: right hem

3rd: beneath corpus callosum, conects w/ lateral

4th: infront of cerebellum

38

cerebral aqueduct

connects 4th to 3rd ventrical

39

choroid plexuses

capillaries from pia secrete CSF, in lateral first then to 3td/4 the into central canal/ into subarachnoid through 4th ventricle

40

CSF

aborded into blood, great concentration of sodium n lest glucose/potassium
nurtitive n protective
maintain stable ionic concentration

41

knee-jerk

monosynaptic: 2 neurons, striking patellar ligaments intiate.
guadriceps femoris muscle goup, lumbar region

42

withdrawal reflex

touching something painful, uses interneurons