The Functional Unit of Skeletal Muscle

question 48

Multiple Choice

The functional unit of skeletal muscle

• A)is the smallest contractile component of a muscle fiber
• B)is the area between two Z lines
• C)is the sarcomere
• D)contains only one A band
• E)exhibits all of the above characteristics

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Definitions:

Chest Tightness

A symptom commonly associated with respiratory conditions, anxiety, or cardiovascular issues, characterized by a constricted feeling in the chest.

Wheezing

A high-pitched whistling sound made while breathing, often associated with difficulty in breathing and related to conditions like asthma or bronchitis.

Shortness Of Breath

A condition marked by difficult or uncomfortable breathing, often a symptom of underlying health issues like heart or lung disease.

Coughing

A sudden, forceful expulsion of air from the lungs, often a reflex to clear the airways of irritants or mucus.