What is the action of the muscle labeled B?
A)abducts thigh at hip joint and medially rotates thigh
B)extends thigh at hip joint and laterally rotates thigh
C)flexes thigh at hip joint
D)flexes leg at knee joint
E)adducts and flexes thigh at hip joint

Question

What is the action of the muscle labeled B? 
A)abducts thigh at hip joint and medially rotates thigh 
B)extends thigh at hip joint and laterally rotates thigh 
C)flexes thigh at hip joint 
D)flexes leg at knee joint 
E)adducts and flexes thigh at hip joint

Quizplus · Accepted Answer

The muscle labeled B is the gluteus maximus, which extends the thigh at the hip joint and laterally rotates the thigh.

What Is the Action of the Muscle Labeled B