A Nurse Is Preparing to Teach About Myofibrils

question 11

Multiple Choice

A nurse is preparing to teach about myofibrils.Which information should the nurse include? The structure of the contractile subunit of the myofibril is called the:

• A) Sarcoplasmic reticulum
• B) Actin
• C) Motor endplate
• D) Sarcomere

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Definitions:

Biological Clock

An internal mechanism that regulates bodily rhythms and cycles, such as the sleep-wake cycle, on a roughly 24-hour schedule.

Hypothalamus

A region of the brain that plays a crucial role in many essential functions, including hormone release, regulation of body temperature, and control of hunger and thirst.

Premenstrual Syndrome (PMS)

A condition that affects a woman's emotions, physical health, and behavior during certain days of the menstrual cycle, generally just before her menses.

Menstrual Cycle

The monthly series of changes a woman's body goes through in preparation for the possibility of pregnancy.