Nervous System pt. 1

Question 1

neurons:

Answer 1

main cells, conducting cells recieves transmits signals

Question 2

neuroglia

Answer 2

supporting cells of neurons

Question 3

Excitability:

Answer 3

ability to rspnd to stimuli

Question 4

COnductivity:

Answer 4

ability to produce electro-chemical signals to other cells

Question 5

Secretion:

Answer 5

ability to produce & secrete a neurotransmitter

Question 6

Sensory neurons:

Answer 6

AFFERENT neurons

w/in PNS

detect stimuli light/pressure/heat

transmit signals to CNS

Question 7

Interneurons:

Answer 7

With in the CNS b.w afferent & efferent neurons

recievbes signals from AFFERENT neurons & determines response

Question 8

Motor Nuerons:

Answer 8

EFFERENT neurons

w/in the PNS

recieves signals from interneurons & transmits signaals to muscles/vicera

Question 9

Structure of the Neuron:

Answer 9

Cell Body-SOMA

single-central nucleus

Dentrites

Axon

Axon Hillock

Myelin Sheath

Question 10

Dedrites:

Answer 10

SHORT extensions of SOMA

recieves signals from other cells & brings to nerve body

Question 11

Axon:

Answer 11

nerve fiber

SINGLE LONG extension of cell boy

transmits signals to other cells w/ electric signals

Question 12

Axon Hillock:

Answer 12

The origin of the AXON from the SOMA

generate action potential

Question 13

Myelin Sheath:

Answer 13

white-fatty covering of the AXON

insulates signal conduction along the AXON for speed

Question 14

Node of Ranvier:

Answer 14

small unmyelied GAPS Axon

Question 15

Terminal Branches:

Answer 15

axon terminals

end of the axon that makes contact with other cells