Question

which of these muscles flexes the foot and is commonly called the calf muscle?

multiple choice

gastrocnemius

biceps brachii

gluteus medius

external oblique

sartorius

Explanation:

Identify the target muscle and its common name

The question asks for a muscle that flexes the foot (specifically plantar flexion) and is commonly referred to as the "calf muscle."

Analyze the given options

• gastrocnemius: This large muscle is located on the back of the lower leg. It is the primary muscle of the calf and is responsible for plantar flexing the foot at the ankle joint.
• biceps brachii: This muscle is located in the upper arm and is responsible for flexing the elbow.
• gluteus medius: This muscle is located in the buttocks/hip region and is responsible for abducting the thigh.
• external oblique: This muscle is located in the abdominal wall and helps rotate and flex the trunk.
• sartorius: This long, thin muscle runs down the length of the thigh and helps flex, abduct, and laterally rotate the hip.

Apply muscle action concepts

Using the Muscle Actions knowledge point, we can confirm that the gastrocnemius is the muscle that plantar flexes the foot and forms the prominent bulk of the calf.

Answer:

• gastrocnemius (Correct answer)
• biceps brachii
• gluteus medius
• external oblique
• sartorius