Contraction of a Muscle

Question 1

Step 1:

Answer 1

Myosin head is attached to the ATP

Question 2

Step 2:

Answer 2

ATP is hydrolyzed to ADP and the myosin head stands upright

Question 3

Step 3:

Answer 3

Myosin head attaches to the revealed binding sites on actin (cross-bridge formed)

Question 4

Step 4:

Answer 4

ADP is removed, causing myosin head to bend, pulling the actin towards the center of sarcomere

Question 5

Step 5:

Answer 5

New ATP binds and detaches the myosin head