Which of the following situations stimulates the skin to produce Vitamin D?
Presence of calcium
Exposure to ultraviolet light
Exposure to cold temperature
Presence of parathyroid hormone
The Correct Answer is B
a. Presence of calcium: Calcium does not directly stimulate the production of Vitamin D in the skin.
b. Exposure to ultraviolet light: UVB rays from sunlight stimulate the skin to produce Vitamin D3 (cholecalciferol).
c. Exposure to cold temperature: Cold temperature does not affect Vitamin D production.
d. Presence of parathyroid hormone: Parathyroid hormone helps regulate calcium levels and can stimulate the conversion of Vitamin D to its active form in the kidneys, but it does not stimulate its production in the skin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a. Left phrenic artery: The left phrenic artery arises from the abdominal aorta, not the ascending aorta. It supplies blood to the diaphragm.
b. Left coronary artery: The ascending aorta is the first section of the aorta, the major artery leaving the heart. It branches out to give rise to several arteries, including the left coronary artery, which supplies blood to the left side of the heart muscle.
c. Left subclavian artery: The left subclavian artery arises from the aortic arch, not directly from the ascending aorta. It supplies blood to the left arm and head.
d. Left intercostal artery: The intercostal arteries arise directly from the aorta, not specifically the ascending aorta. They supply blood to the muscles and tissues between the ribs.
Correct Answer is B
Explanation
a: Storage of fat - While the skin does contain adipose tissue (fat), its primary function is not fat storage.
b. Body temperature regulation-The skin plays a crucial role in regulating body temperature through processes such as sweating to cool the body down and constriction of blood vessels to conserve heat.
c: Energy production - The skin is not directly involved in energy production; this is primarily carried out by organs like the liver and muscles.
d: Gas exchange - Gas exchange occurs primarily in the lungs, not the skin.
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