Question

Quadriceps are the large muscles located on the front of the thigh. They originate in the hip and insert below the knee. Which is correct?

a. Contraction of the quadriceps moves the tibia.

b. Quadriceps are responsible for knee flexion.

c. Standing up from sitting will cause recruitment of the quadriceps.

d. Hamstrings located on the back of the thigh are antagonist.

e. A, B, and D

Answer 1

Answer A,C,D

Quadriceps muscles are muscles of front of legs

A -correct

Rectus femoris ,vastus laterlais and vastus lateralis .Contraction of quadrceps cause extension of knee and when the knee is fully extended Movement of Tibia against femur can occur during forceful contraction of quadriceps and causing Anterior cruciate ligament .

C corect

Standing up from sitting cause recruitment of muscles ( Quariceps especially Rectus femoris and vastus lateralis in cordination with gluteus Muscles )

D correct

Hamstrings and quadriceps are agonist and antagonist of each other .

During knee flexion agonist is harmstrings and antagonist is quadrceps

During knee extension agonist is quadriceps and antagonist is harmstrings .

B incorrect Quadrceps responsible for knee extension and not flexion .