Which of the following occurs in the biceps brachii during the concentric muscle action of a dumbbell curl exercise?
A. Chloride ions are released inside the sarcomere
B. The H zone increases as the Z lines are pulled away from each other
C. Each individual sarcomere is stimulated by an alpha motor neuron
D. The myosin cross bridge heads attach to the actin filaments
Answer:D
Which of the following occurs in the biceps brachii during the concentric muscle action of a dumbbell curl exercise?
A. Chloride ions are released inside the sarcomere B. The H zone increases as the Z lines are pulled away from each other C. Each individual sarcomere is stimulated by an alpha motor neuron D. The myosin cross bridge heads attach to the actin filaments