Question 21

Ischial tuberosity carries the weight of the body when sitting.

The ischial tuberosity is the part of the hip bone that supports the weight of the body during sitting. It acts as a bony projection that provides stability and support, making it the correct answer to this question.

A) Iliac crest

The iliac crest is the upper curved edge of the ilium and serves primarily for muscle attachment and does not bear weight when sitting. While it is an important part of the hip bone, it does not fulfill the function of supporting the body's weight in a seated position.

B) Pubic tubercle

The pubic tubercle is a small bony prominence on the pubis that serves mainly as an attachment site for ligaments. It does not play a role in weight-bearing when sitting, making it an incorrect choice for this question.

C) Ischial tuberosity

The ischial tuberosity is specifically designed for weight-bearing when in a seated position. It is the part of the hip bone that directly contacts the seat, providing support and stability, which confirms it as the correct choice.

D) Ischial ramus

The ischial ramus is a part of the ischium that helps to form the obturator foramen and supports the pelvic floor, but it does not bear weight when sitting. Therefore, it is not the correct answer regarding weight support during sitting.

Conclusion

The ischial tuberosity is the part of the hip bone that effectively supports the body's weight while sitting, making it the definitive correct answer. The other options either do not bear weight or serve different functions within the structure of the hip bone, underscoring why they are not suitable answers to the question.