u3 - aos1 dp3

Question 1

neuron

Answer 1

nerve cell specialised to recieve, process and transmit information.

Question 2

dendrite

Answer 2

short, thin, widely brancing nerve fibre that detects and recieves neural info from other neurons

Question 3

axon

Answer 3

single, tube like, fluid filled extention that transmits message down neuron

Question 4

myelin sheath

Answer 4

white, fatty substance that encases axon that helps speed up transmission of info

Question 5

axon terminals + buttons

Answer 5

branch like structures at en of axon each one has a knob like tip - axon buttons
store and secrete neurotransmitters

Question 6

motor neuron

Answer 6

efferent
carries message form CNS to effectors (skeletal or visceral muscles)
stimulate activity or response

Question 7

sensory neurons

Answer 7

afferent
recieves messages from both internal and external environments to CNS

Question 8

interneurons

Answer 8

sends message between sensory and motor within CNS
sensory and motor rarely connect