"when a muscle is stretched, the ___ and___ afferents are activated?" course hero

Where do muscle cells conduct action potentials?

They conduct action potentials from the sarcolemma to the interior of the muscle cell Which of the following statements is (are) TRUE about the excitation-contraction coupling mechanism in skeletal muscle? (Mark ALL that apply.)

What is the role of calcium ions in skeletal muscle contraction?

What is the role of calcium ions in the contraction of skeletal muscle? A. Calcium ions diffuse across the synaptic cleft to result in depolarization of the muscle membrane. Calcium ions bind to lactic acid to remove it from the contracting muscle.

Which ions bind to lactic acid to remove it from muscle?

Calcium ions bind to lactic acid to remove it from the contracting muscle. B. Calcium ions bind to the troponin-tropomyosin complex and remove their inhibitory action on actin/myosin interaction.

Which ions directly activate ATPase in the myosin head?

C. Calcium ions directly activate ATPase in the myosin head. D. The release of calcium ions triggers the immediate regeneration of creatine phosphate to power the contraction.

Which action potential opens calcium channels in the membrane of the sarcoplasmic reticulum?

A. An action potential in a T tubule opens calcium channels in the membrane of the sarcoplasmic reticulum.

What is the effect of neurotransmitter on collagen?

D. A neurotransmitter alters the arrangement of collagen fibers in the endomysium, causing it to shrink more tightly around the muscle fiber

Where do sarcolemma conduct action potentials?

A. They conduct action potentials from the sarcolemma to the interior of the muscle cell.