Chapter 7 Flashcards Preview

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Flashcards in Chapter 7 Deck (36):
1

Nerovus system

Master controlling and communicating system

2

Sensory input

Information gathered by stimuli

3

Integration

A process that makes decisions based on the sensory input

4

Central nervous system

Brain and spinal cord

5

Peripheral nervous system

Part of nervous system outside of the CNS

6

Afferent

Nerve fibers that convey impulses to the CNS

7

Efferent

Carries impulses from CNS to Muscles and glands (efferent organs)

8

Somatic nervous system

Allows concious control of skeletal muscles

9

Autonomic nervous system

Regulates involuntary events, such as cardiac muscle

10

Neuroglia

Provide support and protection to neurons

11

Astrocytes

Star shaped cells that make up almost half of the neural tissue

12

Microglia

Spiderlike phagocytes that dispose of debris

13

Ependymal

Glial cells that line cavaties of the brain and spinal cord

14

Oligodendocrytes

Glia that wrap flat extentions tightly around nerve fibers

15

Schwann cells

Form living barrier between neurons and capillaries in CNS

16

Satellite cells

Protective coushioning cells

17

Neurons

Cells specialized to transmit messages

18

Dendrites

Neuron processes that convey incoming messages

19

Axons

Bneerate neve impulses and typically conduct them away from the cell body

20

Axon hillcock

Axon that arises from a conelike region of the cell body

21

Axon terminals

Branches at the terminal end of an axon

22

Neurotransmitters synapse

Vesicles or membranous sacs that contain chemicals

23

Myelin

Fatty material that covers long nerve fibers

24

Myeling sheath

Tight coil of wrapped membranes that encloses the axon

25

Nodes of Ranvier

Gaps between Schwann cells

26

Depolarization

An inward rush of sodium ions changes the polarity of the neuron's membrane

27

Action potential

Long distance signal

28

Repolarizaiton

Outflow of positive ions from cell that restores the electrical condition at the membrane to the polarized or resting state

29

Cerebrum

Cerebral hemispheres

30

Parietal lobe

Either of the paried lobes at the top of the head

31

Frontal lobe

Each of the paired lobes of the brain behind the forehead

32

Occipital lobe

Rearmost lobe in each cerebral hemisphere

33

Temporal lobe

Eahc of the paired lobes lying beneath the temples

34

Gray matter

Outermost of the cerebrum

35

Cerebral white matter

Most of the remaining cerebrum

36

Crebellum

Base of brain