Nervous System pt. 1 Flashcards Preview

College Anatomy Exam > Nervous System pt. 1 > Flashcards

Flashcards in Nervous System pt. 1 Deck (15):
1

neurons:

main cells, conducting cells recieves transmits signals

2

neuroglia

supporting cells of neurons

3

Excitability:

ability to rspnd to stimuli

4

COnductivity:

ability to produce electro-chemical signals to other cells

5

Secretion:

ability to produce & secrete a neurotransmitter

6

Sensory neurons:

AFFERENT neurons

w/in PNS

detect stimuli light/pressure/heat

transmit signals to CNS

7

Interneurons:

With in the CNS b.w afferent & efferent neurons

recievbes signals from AFFERENT neurons & determines response

8

Motor Nuerons:

EFFERENT neurons

w/in the PNS

recieves signals from interneurons & transmits signaals to muscles/vicera

9

Structure of the Neuron:

Cell Body-SOMA

single-central nucleus

Dentrites

Axon

Axon Hillock

Myelin Sheath

10

Dedrites:

SHORT extensions of SOMA

recieves signals from other cells & brings to nerve body

11

Axon:

nerve fiber

SINGLE LONG extension of cell boy

transmits signals to other cells w/ electric signals

12

Axon Hillock:

The origin of the AXON from the SOMA

generate action potential

13

Myelin Sheath:

white-fatty covering of the AXON

insulates signal conduction along the AXON for speed

14

Node of Ranvier:

small unmyelied GAPS Axon

15

Terminal Branches:

axon terminals

end of the axon that makes contact with other cells