N11.2 Vitamin D

Given enough exposure of skin to sunlight, the body can synthesize the vitamin D it needs by making it out of _____.

The active form of Vitamin D that is released by the kidneys is known as

• calcitriol

• calcidiol

• cholecalciferol

• cholesterol

Which of the following are effects of the action of calcitriol within the body? (Check all that apply.)

• facilitate intestinal absorption of calcium

• directs kidneys to reabsorb calcium

• produce melanin to darken the skin

• reduce hematopoesis

Kidneys may concentrate excess calcium in order to excrete it, resulting in

• nephrolithiasis

• nephrectomy

• calmodulin

• hypercalcemia

Which of the following foods is the best source of Vitamin D?

• fortified milk

• spinach

• oatmeal

• oranges

• whole wheat bread

Which of the following foods is the NOT a good source of Vitamin D?

• fortified milk

• fortified cereal

• salmon

• oranges

• egg salad

Which daily intake of Vitamin D is considered both adequate and safe for a healthy adult?

• 4000 IU

• 600 IU

• 1200 IU

• 100 ug

The xrays show children who are likely suffering from

• rickets

• osteomalacia

• osteoporosis

• xerosis