Ch 11 vocab Flashcards


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1

meninges

membrane that protects brain and spinal cord

2

bura mater

tough outermost membrane enveloping the brain and spinal cord

3

arachnoid mater

-middle layer, weblike

-subarachnoid space contains space contains CSF

4

cerebrospinal fluid (CSF)

secretes by choroid plexus

5

pia mater

-inner layer; attached to surface of brian, spinal cord

- blood vessels and nerves

-nourishes CNS

6

ventricles

interconnected cavities within cerebral hemispheres and brianstem

7

choroid plexuses

special capillaries of pia mater covered by ependymalceus

8

brainstem

connects the brain to the spinal cord

9

corpus callosum

connects cerebral hemispheres

10

cerebral cortex

-thin layer of gray matter

-outermost layer of the cerebrum

11

diencephalon

surrounds 3rd ventricle

composed of gray matter

12

thalamus

-receives all sensory impulses

-channels impulses to appropriate part of cerebral cortex for interpretation

13

hypothalamus

maintains homeostasis by regulating visceral activities.

14

limbic system

-consists of several structures in various parts of brain

- controls emotions

15

midbrain

short section of brainstem

contains bundle fibers that join lower parts of brainstem and spinal cord with higher part of brian

16

pons

rounded bulge on underside of brainstem

17

medulla oblongata

enlarged continuation of spinal cord

18

cerebellum

portion of brain in back of head between cerebrum and brain stem

19

cerebellar cortex

layer of folded tissue containing most of the cerebellum's neurons

20

spinal cord

column of nerve tissue that runs from base of skull to center of back

21

spinal nerves

-mixed nerves except 1st pair

-originate from spinal cord

-31 pairs

22

central canal

circulates in ventricles

23

reflex

automatic, subconscious response to stimuli within or outside the body

24

ascending tracts

conducts sensory impulses to the brain

25

descending tracts

conduct motor impulses from the brain to motor neurons reaching muscle and glands

26

sensory nerves

-afferent nerves

-conduct impulses to brain and spinal cord

27

motor nerves

-efferent nerves

-conduct impulses to muscle or glands

28

mixed nerves

contain both sensory and motor nerve fibers

29

cranial nerves

-12 pairs on underside of brain

-most mixed nerves

30

cranial plexus

-C1-C4

-supply muscle and skin of the neck

31

brachial plexus

C5-T1

supplies arms/ upper extremities

32

lumbosacral plexus

L1-S4

supplies lower limbs

33

intercostal nerves

aiding in contraction of muscle and return of sensory info from skin to parietal pleura

34

sympathetic division

prepares body for "fight or flight" situations; speeds up body

35

parasympathetic division

prepares body for 'resting and digesting' activities; slows body down