Which statement is true about common criteria used to name skeletal muscles?

Which statement is true about common criteria used to name skeletal muscles?

• A. Direction of muscle fibers is a criterion.
• B. Color of the muscle is a criterion.
• C. Volume of blood supplied to the muscle is a criterion.
• D. The season when the muscle is typically used is a criterion.

Answer: (A)

Naming skeletal muscles often reflects how the fibers are arranged, because the direction of the muscle fibers helps describe both its shape and how it pulls on a joint. Terms like rectus, oblique, and transverse tell you whether fibers run straight along the length, diagonally, or horizontally, which in turn suggests the line of pull and function. For example, the rectus abdominis has fibers running parallel to the midline, giving a straight, vertical pull, while oblique muscles run at an angle and transverse muscles run horizontally. This is why the direction of fiber arrangement is a standard criterion used when naming muscles. Colors, blood flow, or seasonal factors aren’t used to name muscles, so those options don’t fit as naming criteria.

Naming skeletal muscles often reflects how the fibers are arranged, because the direction of the muscle fibers helps describe both its shape and how it pulls on a joint. Terms like rectus, oblique, and transverse tell you whether fibers run straight along the length, diagonally, or horizontally, which in turn suggests the line of pull and function. For example, the rectus abdominis has fibers running parallel to the midline, giving a straight, vertical pull, while oblique muscles run at an angle and transverse muscles run horizontally. This is why the direction of fiber arrangement is a standard criterion used when naming muscles. Colors, blood flow, or seasonal factors aren’t used to name muscles, so those options don’t fit as naming criteria.