neurons and synaptic transmission

Question 1

what is the order neurons run in within the body

Answer 1

1. sensory
2. relay
3. motor

Question 2

what are cells that conduct nerve impulses called

Answer 2

neurons

Question 3

what is the gap separating neurons called

Answer 3

synapse

Question 4

what is the dendrites function

Answer 4

receives signals from other neurons and sensory receptor cells

Question 5

what does an axon look like

Answer 5

long slender fibre

Question 6

what is the function of an axon

Answer 6

carry nerve impulses in the form of electrical signals (action potential)

Question 7

what is the function of the myelin sheath

Answer 7

surrounds and insulates the axon

Question 8

what does the myelin sheath do to electrical impulses

Answer 8

speeds them up

Question 9

what are the 3 different types of neurons are there

Answer 9

sensory
relay
motor

Question 10

where are sensory neurons found

Answer 10

in receptor cells

Question 11

what is the function of the sensory neuron

Answer 11

carry nerve impulses for the PNS to spinal cord and brain (CNS)

Question 12

what happens when the nerve impulses reach the brain - sensory neurons

Answer 12

translate into ‘sensations’ of vision, hearing, taste and touch

Question 13

key words for sensory neuron

Answer 13

• receptor cells
• PNS to CNS
• translates nerve impulses into ‘sensations’ - vision, hearing

Question 14

what does a sensory neuron look like

Answer 14

short axons and long dendrite

Question 15

where are motor neurons found

Answer 15

found in the central nervous system (CNS)

Question 16

what is the function of motor neurons

Answer 16

control movements and carry messages from the CNS to muscles and glands

Question 17

what happens when motor neurons are stimulated

Answer 17

when motor neurons are stimulated they release neurotransmitters which then bind to receptor cells of muscles, triggering a response and then movement

Question 18

key words for motor neurons

Answer 18

• found in CNS
• carry/move messages from CNS to muscles/glands
• stimulated =release neurotransmitters
• neurotransmitters bind to muscles of receptor cells
• trigger response = movement