The Motor Unit

Question 1

what’s the first step of the motor unit response?

Answer 1

the electrical impulse starts at the medulla oblongata

Question 2

what’s the second action in the motor unit response?

Answer 2

it travels down the spinal cord in a tube called the axon

Question 3

what’s the third step in the motor unit response?

Answer 3

the electrical impulse is sent to the motor end plate. However, the nerve impulse travelling to the muscle fibre is an electrochemical process which requires action potential.

Question 4

what is action potential?

Answer 4

your body getting ready to contract the muscle

Question 5

what’s the fourth step in the motor unit response?

Answer 5

electrical impulse now gets turned into a neurotransmitter called acetycholine

Question 6

what’s the fifth step of the motor unit response?

Answer 6

the neurotransmitter is secreted across the synaptic cleft to fire off the muscle fibre

Question 7

what response does the motor unit exhibit?

Answer 7

the All-or-None response