Control and Communication

Question 1

What do sensory neuron do

Answer 1

carry electrical impulses from sense organ to CNS

Question 2

What do inter neuron do

Answer 2

nerve cell found in CNS that connect with other neurons

Question 3

What do motor neuron do

Answer 3

nerve cell, carry electrical impulse from CNS to muscle and glands (effectors), this can be rapid action or slow response

Question 4

What are neurons

Answer 4

specialised cells that carry electrical impulse. they have a synapse between them

Question 5

what is a neurotransmitter

Answer 5

chemicals which transfer a chemical message of the impulse across the synapse or from neuron to effector organ

Question 6

what are the steps of neurotransmitter diffusing over a synapse

Answer 6

1) electrical only travels in one direction (cell body to axon terminal)
2) electrical impulse trigger nerve endings to release neurotransmitter
3) neurotransmitter diffuse over synapse
4) neurotransmitter binds with receptor molecules or next neuron and stimulates it to transmit the electrical impulse

Question 7

What is the reflex arc

Answer 7

1) pain receptor detects stimulus
2) electrical impulse towards CNS along sensory neuron to inter neuron
3) inter neuron relay protective response to the motor neuron
4) motor neuron send electrical impulse to correct muscle/effector