The nurse is instructing a mother to encourage her school-age children to play out of doors because it will help reduce the risk of osteomalacia by:

Question

1. increasing renal perfusion, which helps to activate vitamin D.
2. increasing the level of an inactive form of vitamin D in the blood.
3. increasing osteoblastic activity to maintain calcium in the bone.
4. enhancing activation of the parathyroid hormone.

Answer 1

Correct Answer: 2
Rationale 1: Vitamin D is activated by the kidneys, but ultraviolet light exposure is not part of this process.
Rationale 2: Ultraviolet light increases the blood level of cholecalciferol synthesized from cholesterol in the skin.
Rationale 3: Exercise does help maintain bone mass, but osteomalacia results from a deficiency of vitamin D.
Rationale 4: Osteomalacia results from a deficiency of vitamin D. Parathyroid glands are activated by a negative feedback loop.
Global Rationale: Ultraviolet light increases the blood level of cholecalciferol synthesized from cholesterol in the skin. Vitamin D is activated by the kidneys, but ultraviolet light exposure is not part of this process. Exercise does help maintain bone mass, but osteomalacia results from a deficiency of vitamin D. Parathyroid glands are activated by a negative feedback loop.