What Is the Basic Functional Unit of the Myofibril Composed

question 4

Multiple Choice

What is the basic functional unit of the myofibril composed of?

• A) Contractile proteins myosin and actin grouped together as a sarcomere
• B) Tendons and muscles
• C) Skeletal muscle
• D) Type I muscle fibers

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Definitions:

Smaller-Gauge Needle

A needle with a higher gauge number indicating a smaller diameter, used for injections to minimize discomfort and tissue damage.

Butterfly Needle Method

A technique for drawing blood or delivering medications using a small, winged needle named for its wing-like plastic flaps.

Very Small Veins

The smallest type of veins in the circulatory system, responsible for returning deoxygenated blood to the heart from the tissues.

Mastectomy

Surgical removal of a breast.