In-Text Figure Based Questions
-What are the body's two sources of cholecalciferol (vitamin D3)? (Figure 5-10)
A) air and water
B) air and food
C) sunlight and water
D) sunlight and food
E) air and sunlight

Question

Quizplus · Accepted Answer

Figure 5-10 shows that the body's two sources of cholecalciferol (vitamin D3) are sunlight and food. Specifically, the figure indicates that UVB radiation from sunlight can trigger the synthesis of cholecalciferol in the skin, while certain foods (e.g. fatty fish, egg yolks) contain cholecalciferol that can be absorbed by the body. Therefore, option D (sunlight and food) is the correct choice.