Neurons

Question 1

Neurons

Answer 1

Cels that conduct nerve impulses
Electrochemical events control everything, like think or feel, make up the nervous system.

Question 2

Motor neuron

Answer 2

Sends message from cns to rns
Carry action potentials (nerve impulses)
Away from cns, towards an effector

Have short dendrites
Long axon
Large cell body

Question 3

Sensory neuron

Answer 3

Sends. Message from the PNS about the environment to the CNS.
Carry’s action potentials away from a sense organ or receptor in PNS towards the CNS.

Short axon
Small cell body

Question 4

Relay neuron

Answer 4

Sends messages quickly between sensory and motor neurons.
Involved in reflexes
Carry action potentials between neurons, within the CNS.

Situated in spinal cord and brain
Have many axons

Question 5

Action potentials

Answer 5

Rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characterised pattern

E.g. neurons and muscle cells
Stimulates starts the rapid change in voltage or action potentials.

Question 6

reflex arc

Answer 6

controlled by reflexes
nerve pathway makes a fast automatic response.
e.g. pull hand away from flame without thinking about it

Question 7

reflex arc order

Answer 7

stimulas
receptor
sensory neuron
relay sensory neuron in cns
motor neuron
effecter
response