A Patient Is Hospitalized with Muscle Spasms Caused by Failure

Multiple Choice

A patient is hospitalized with muscle spasms caused by failure of back muscles to relax after contraction. Which of the following would most likely help the back muscles relax?

A) Inject calcium into the back muscles.
B) Inject a drug that induces tropomyosin and troponin to bind to the myosin-binding sites on actin.
C) Inject a drug that increases the amount of acetylcholine at the synapses controlling the back muscles.
D) Inject a drug that depolarizes the motor neurons controlling the back muscles.