Question

Which of the following movements in man are directly concerned with locomotion ?

• A. Bending of arm at elbow
• B. Rotation of head of femur in acetabulum
• C. Peristaltic movements
• D. Contraction of the heart

Answer 1

Answer: (B)

Rotation of head of femur in acetabulum

Locomotion is the movement of organisms from one place to another. The femur and the acetabulum form the hip joint. Hence, the rotation of head of femur in acetabulum will lead to the movement of the legs and thereby, be help in locomotion. Bending of arm at elbow will only cause movement of hands and hence no locomotion. Peristalsis is the movement of the oesophagus as food pases through it and so, it can also not be considered as locomotion. Contraction of the heart will only cause pumping of blood and will not be responsible for actual locomotion.