#1
What is the primary source of vitamin D for humans?
Sunlight
ExplanationSunlight is essential for the synthesis of vitamin D in the skin.
#2
Which form of vitamin D is synthesized in the skin upon exposure to sunlight?
Vitamin D3
ExplanationVitamin D3 is produced when sunlight interacts with the skin.
#3
What is the active form of vitamin D in the body?
Vitamin D3
ExplanationVitamin D3 is the biologically active form of vitamin D.
#4
What is the role of vitamin D in the body?
Bone health and calcium absorption
ExplanationVitamin D is crucial for maintaining bone health and aiding in calcium absorption.
#5
Which population group is at a higher risk of vitamin D deficiency?
Elderly
ExplanationElderly individuals are more prone to vitamin D deficiency due to reduced skin synthesis and dietary intake.
#6
What is the recommended daily intake of vitamin D for adults?
600 IU
ExplanationAdults are recommended to consume 600 IU of vitamin D daily.
#7
Which of the following foods is a good source of vitamin D?
Milk
ExplanationMilk is fortified with vitamin D, making it a good dietary source.
#8
Which of the following is a symptom of vitamin D deficiency?
Bone pain
ExplanationBone pain can be a symptom of insufficient vitamin D levels.
#9
What happens if there is excess vitamin D in the body?
Increased calcium absorption
ExplanationExcess vitamin D can lead to increased calcium absorption, potentially causing hypercalcemia.
#10
Which of the following diseases is associated with low levels of vitamin D?
Osteoporosis
ExplanationLow vitamin D levels are linked to osteoporosis, a condition characterized by weakened bones.
#11
What is the role of vitamin D in the immune system?
It enhances the immune response
ExplanationVitamin D plays a role in enhancing the immune system's response to infections and diseases.
#12
Which of the following is a function of vitamin D in the body?
Regulation of blood pressure
ExplanationVitamin D contributes to the regulation of blood pressure in the body.
#13
How does vitamin D affect the absorption of calcium?
It increases calcium absorption
ExplanationVitamin D enhances the absorption of calcium in the intestines.