The First Event to Occur in Muscle Relaxation Is

question 45

Multiple Choice

The first event to occur in muscle relaxation is:

• A) tropomyosin returns to its original position.
• B) myosin cross-bridges are prevented from binding to actin.
• C) the sarcoplasmic reticulum begins actively pumping calcium back into its sacs.
• D) acetylcholine is released.

---

Definitions:

Tympanic Membrane

A thin, cone-shaped membrane that separates the external ear from the middle ear and vibrates in response to sound waves, also known as the eardrum.

Pearly Gray

A description often used for objects or surfaces that have a soft, shiny gray appearance similar to that of pearls.

Vital Signs

Measurements of the body's most basic functions, including temperature, heart rate, blood pressure, and respiratory rate.

Pulse Rate

The number of times the heart beats per minute, a vital sign used to assess the heart's functioning and overall cardiovascular health.