Which type of light is responsible for the synthesis of vitamin D in the skin?Question 22Select one:a.Infrared radiationb.Ultraviolet radiationc.Visible lightd.X-rays

Vitamin D is unique because in the presence of sunlight, skin cells can synthesize a sufficient supply of vitamin D, which is why it is also correctly classified as a conditional vitamin or as a ______.Multiple choice question.calcitriolprohormonetocopherolretinoid

Which of the following is the term used for the biologically active forms of vitamin A?Multiple choice question.RetinoidsTocopherolsPhylloquinoneAscorbic acid

Discuss the benefit (vitamin D) and danger of exposure (sunburn, skin cancer)to sunlight on the skin

Select all that applyFactors that affect the conversion of sunlight to vitamin D include _____.Multiple select question.ageimmune functionalitypregnancyskin colordietary intake of fruits and vegetables

Question 30The two steps of the Vitamin D synthesis are summarized below. Step 1: 7-dehydrocholesterol + UV light ⇒ previtamin D3ΔG = -134 kJ/molStep 2: previtamin D3 ⇒ cholecalciferol (Vitamin D)ΔG = +58 kJ/mol What is ΔG for Vitamin D synthesis? A.-192 kJ/molB.-76 kJ/molC.+76 kJ/molD.+192 kJ/mol