NST 10 MIDTERM 2 PRACTICE QUESTIONS
WITH DETAILED EXPLANATIONS 2026
◉ Retinoid Forms.
Answer: Contained in Vitamin A
- 3 active retinoids: Retinol, Retinal, and Retinoic Acid
* Food sources: liver, eggs, fortified milk or cereals
- Storage form in liver: Retinyl Ester
◉ Beta-carotene.
Answer: Vitamin A precursor
- Food sources: orange, red, yellow and dark green
fruits and vegetables.
◉ Retinol-binding-protein.
Answer: A transport protein necessary for transport of Vitamin A in
the blood from the liver to target tissues
◉ Vitamin A and vision.
Answer: - Helps maintain cornea (retinoic acid)
- Involved in conversion of light energy into nerve
, impulses in the rod cells of the retina (retinal)
◉ Vitamin A deficiency.
Answer: - Night blindness
- Xerophthalmia
- Keratinization
◉ Ergocalciferol.
Answer: Form of Vitamin D (VD2) found in plant sources and
supplements
◉ Cholecalciferol.
Answer: Form of Vitamin D (Vd3) found in animal source foods and
the human body
◉ Calcitriol.
Answer: Activation of Vitamin D in the kidneys after synthesis
◉ Rickets.
Answer: Caused by a Vitamin D deficiency
- Bowed legs: poorly formed long bones ion the legs bend outward
as weight-bearing activities begin
WITH DETAILED EXPLANATIONS 2026
◉ Retinoid Forms.
Answer: Contained in Vitamin A
- 3 active retinoids: Retinol, Retinal, and Retinoic Acid
* Food sources: liver, eggs, fortified milk or cereals
- Storage form in liver: Retinyl Ester
◉ Beta-carotene.
Answer: Vitamin A precursor
- Food sources: orange, red, yellow and dark green
fruits and vegetables.
◉ Retinol-binding-protein.
Answer: A transport protein necessary for transport of Vitamin A in
the blood from the liver to target tissues
◉ Vitamin A and vision.
Answer: - Helps maintain cornea (retinoic acid)
- Involved in conversion of light energy into nerve
, impulses in the rod cells of the retina (retinal)
◉ Vitamin A deficiency.
Answer: - Night blindness
- Xerophthalmia
- Keratinization
◉ Ergocalciferol.
Answer: Form of Vitamin D (VD2) found in plant sources and
supplements
◉ Cholecalciferol.
Answer: Form of Vitamin D (Vd3) found in animal source foods and
the human body
◉ Calcitriol.
Answer: Activation of Vitamin D in the kidneys after synthesis
◉ Rickets.
Answer: Caused by a Vitamin D deficiency
- Bowed legs: poorly formed long bones ion the legs bend outward
as weight-bearing activities begin
