anatomy part 3

Question 1

step 1

Answer 1

the brain decides to contract a skeletal muscle

Question 2

step 2

Answer 2

motor neurons carry the action potential down the spinal cord to the skeletal muscle

Question 3

step 3

Answer 3

the action potential arrives at the neuromuscular junction

Question 4

step 4

Answer 4

the action potential causes the axon terminal to release ACH

Question 5

step 5

Answer 5

ACH binds to receptors on the sarcolemma (nicotinic receptors)

Question 6

step 6

Answer 6

the binding causes the action potential to travel down to the sarcolemma

Question 7

step 7

Answer 7

the action potential travels down the T Tubuels

Question 8

step 8

Answer 8

the sarcoplasmic reticulum is stimulated by the action potential and releases CA2+

Question 9

step 9

Answer 9

Ca2+ triggers the muscle fiber to contract