Question

Which of the following is a function of skin? a. temperature regulation b. manufacture of vitamin D c. protection from invading pathogens d. All of these are correct.

Short answer

The functions of skin include temperature regulation, manufacture of vitamin D, and protection from invading pathogens. Therefore, the correct answer is (d) All of these are correct.

Step-by-step solution

Analyze Option (a) - Temperature Regulation

Skin helps maintain the body's temperature by regulating heat loss through processes like sweating, vasodilation, and vasoconstriction. So, (a) is a function of skin.

Analyze Option (b) - Manufacture of Vitamin D

The skin plays a role in the production of vitamin D when exposed to sunlight. The ultraviolet rays from the sun help convert cholesterol in the skin into vitamin D, which is essential for overall health. So, (b) is a function of skin.

Analyze Option (c) - Protection from Invading Pathogens

Skin serves as the body's first line of defense against pathogens and other environmental threats. It acts as a physical barrier, preventing harmful bacteria and viruses from entering the body. So, (c) is a function of skin. Since all the options (a), (b), and (c) are functions of skin, the correct answer is:

Conclusion

d. All of these are correct.