Which of the following best describes a key physiological characteristic of skeletal muscle tissue?

• A. It is under voluntary control and responsible for body movement.
• B. It lacks striations and is multinucleated.
• C. It lines hollow organs and is responsible for peristalsis.
• D. It is found only in the walls of the heart and contracts involuntarily.

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by identifying the key characteristics of skeletal muscle tissue. Skeletal muscle is one of the three types of muscle tissue in the human body, alongside cardiac and smooth muscle.
2. Step 2: Recall that skeletal muscle tissue is under voluntary control, meaning its contractions are consciously controlled by the somatic nervous system. This is a defining feature of skeletal muscle.
3. Step 3: Understand that skeletal muscle tissue is responsible for body movement. It attaches to bones via tendons and facilitates movement by contracting and relaxing.
4. Step 4: Note that skeletal muscle tissue is striated, meaning it has a striped appearance under a microscope due to the arrangement of actin and myosin filaments. It is also multinucleated, meaning each muscle fiber contains multiple nuclei.
5. Step 5: Compare skeletal muscle tissue to the other options provided. Smooth muscle lines hollow organs and is responsible for peristalsis, while cardiac muscle is found only in the heart and contracts involuntarily. These characteristics do not describe skeletal muscle tissue.