Vitamin D is synthesised using sunshine, by the:
Show answer & explanation
Correct answer: A
Explanation
The Correct answer is option 1 i.e. Skin.
Vitamin D is synthesized in the skin when it is exposed to sunlight, specifically to ultraviolet B (UVB) rays. The UVB radiation converts 7-dehydrocholesterol, a compound present in the skin, into cholecalciferol (Vitamin D₃). This Vitamin D₃ then travels through the bloodstream to the liver and kidneys, where it is converted into its active form, calcitriol, which helps in calcium absorption and maintaining bone health. Thus, regular sun exposure is essential for natural Vitamin D production in the body.
Other options:
-
Mouth: Only absorbs Vitamin D from food or supplements, not sunlight.
-
Leg: No specific role; skin on any body part can synthesize Vitamin D.
-
Blood veins: Transport Vitamin D but do not produce it.