Answer to Question 1
B
Feedback:
Vitamin D is important because it facilitates the absorption of calcium and phosphorous, and they, in turn, are important for growth and repair of bones. Vitamin D does not prevent skin aging. It also does not help in the heat loss mechanism nor does it increase the body's metabolic rate.
Answer to Question 2
D
Feedback:
The hypodermis anchors the skin to the underlying tissues and organs. It also cushions, supports, nourishes, and insulates the skin. The epidermis, not the hypodermis, acts as a waterproof barrier protecting the inside of the body. The epidermis also restricts the penetration of microorganisms. The dermis nourishes and supports the epidermis, not the hypodermis.