biopsychology: structure and function of neurones

Question 1

where does the sensory neurone take messages?

Answer 1

from senses (ears, eyes, skin) to brain

Question 2

where does the relay neurone take messages?

Answer 2

within brain/spinal cord

Question 3

where does the motor neurone take messages?

Answer 3

away from brain to rest of body

Question 4

what do sensory neurones consist of and their functions?

Answer 4

• receptor cell: sense external stimulation
• myelin sheath: fatty laye protects axon
• cell body: includes nucleus containing dna
• axon: carries impulses away from cell body

Question 5

what do relay neurones consist of and their functions?

Answer 5

• dendrite: carry impulses from neurone to cell body
• cell body: includes nucleus containing dan
• axon: carries impulses away from cell body

Question 6

what do motor neurones consist of and their functions?

Answer 6

• dendrite: carry impulses from neurone to cell body
• nucleus: contains dna
• cell body: includes dna
• myelin sheath: fatty layer protects axon
• node of ranvier: gaps which speed up transmission of an impulse
• terminal button: communicate with next neurone

Question 7

sensory neurones: axon and dendrite length

Answer 7

short axon
long dendrite

Question 8

relay neurones: axon and dendrite length

Answer 8

short axon
short dendrite

Question 9

motor neurones: axon and dendrite length

Answer 9

long axon
short dendrite

Question 10

sensory neurones: direction of movement

Answer 10

from senses to brain

Question 11

relay neurones: direction of movement

Answer 11

to and from brain

Question 12

motor neurones: direction of movement

Answer 12

from brain to muscles