Which of the Following Choices Lists a Correct Sequence of Events

question 9

Multiple Choice

Which of the following choices lists a correct sequence of events following the depolarization of transverse tubules in excitation-contraction coupling in cardiac muscle?

• A)Calcium release into cytosol,calcium ion influx through sarcolemma,actin and myosin attach,thin filaments slide toward the middle of sarcomeres
• B)Actin and myosin attach,thin filaments slide toward the middle of sarcomeres,calcium release into cytosol
• C)Calcium release into cytosol,actin and myosin attach,calcium ion influx through sarcolemma,thin myofilaments slide toward the middle of sarcomeres
• D)Calcium release into cytosol,actin and myosin attach,thin filaments slide toward the middle of sarcomeres,calcium ion influx through sarcolemma
• E)Calcium ion influx through sarcolemma,calcium release into cytosol,actin and myosin attach,thin myofilaments slide toward the middle of sarcomeres

---

Definitions:

Enteric Plexus

A network of neurons located in the gastrointestinal tract walls that governs the function of the gastrointestinal system, often referred to as the "second brain."

Myenteric Plexus

A network of neurons located in the walls of the gastrointestinal tract, involved in the control of muscle contractions and gut motility.

Celiac Plexus

A complex network of nerves located in the abdomen, often called the solar plexus, that manages the pain and reflexes in the abdominal organs.

Hirschsprung Disease

A congenital condition characterized by the absence of nerve cells in a part of the colon, leading to severe constipation or intestinal obstruction.