14.5.2a Appreciating Healthy Musculoskeletal System (Objective Questions)

A man is complaining of frequent back pains due to an injury.
Which of the following would help reduce his problem?
I     Do vigorous exercise
II    Eat plenty of protein
III    Avoid carrying heavy objects
IV    Practice a good posture

Diagram below shows the changes of posture in a woman’s skeleton as the grows older due to lack of certain hormones and nutrients.

What are these hormone and nutrient?

Diagram below shows an artificial joints in a knee.

Which disease relates to the usage of artificial joints?