Question

multiple choice 2 points
skeletal muscle is called ________, because it is usually subject to conscious control.

isometric
contractile
striated
excitable
voluntary

Explanation:

Analyze the question stem

The question asks to fill in the blank: "Skeletal muscle is called ________, because it is usually subject to conscious control."

Evaluate the options based on the definition

• isometric: Refers to a type of contraction where muscle length remains constant.
• contractile: Refers to the ability of muscle tissue to shorten and generate force.
• striated: Refers to the striped microscopic appearance of skeletal and cardiac muscle fibers.
• excitable: Refers to the ability of muscle cells to respond to electrical or chemical stimuli.
• voluntary: Refers to muscles that can be controlled consciously by the somatic nervous system.

Match the definition to the correct term

The phrase "subject to conscious control" directly defines the term "voluntary". Therefore, skeletal muscle is called voluntary muscle.

Answer:

• isometric
• contractile
• striated
• excitable
• voluntary (Correct answer)