Question

tendinous intersections divide the ______ into segments that are externally visible on the abdomen of a well-muscled person.

a vastuslateralis
b serratusanterior
c rectusabdominis
d quadricepsfemoris
e transverseabdominal

Explanation:

Identify the anatomical structure and muscle

The question asks which muscle is divided by tendinous intersections into segments that are externally visible on the abdomen of a well-muscled person (often referred to as a "six-pack").

Evaluate the options

• vastus lateralis: A muscle of the quadriceps group in the thigh.
• serratus anterior: A muscle on the lateral wall of the chest.
• rectus abdominis: A paired muscle running vertically on each side of the anterior wall of the abdomen, divided horizontally by three fibrous bands called tendinous intersections.
• quadriceps femoris: A large muscle group on the front of the thigh.
• transverse abdominal (transversus abdominis): The deepest flat muscle of the abdominal wall, with fibers running horizontally; it does not have these visible vertical segments.

Confirm the correct muscle

The rectus abdominis is the muscle segmented by tendinous intersections, making option C the correct choice.

Answer:

• (A) vastuslateralis
• (B) serratusanterior
• (C) rectusabdominis (Correct answer)
• (D) quadricepsfemoris
• (E) transverseabdominal