Past Mock and Exam Questions (Vitamin D)

Question 1

Properties of Vitamin D

3/7

Answer 1

Most stable of all the vitamins

Fat soluble

Insoluble in water

Heat stable (unaffected by cooking or preservation)

Unaffected by acids

Unaffected by alkalis

Unaffected by oxygen

Question 2

Sources of Vitamin D

2/6

Answer 2

Oily fish
Fortified milk
Eggs
Margarine
Fish liver oils
Butter

Question 3

Biological function of Vitamin D

3/4

Answer 3

Absorption of calcium and phosphorus

Regulates amount of calcium and phosphorus in bones

Regulates amount of calcium and phosphorus in teeth

Regulates calcium levels in the blood

Question 4

Types of Vitamin D

Name

Answer 4

Cholecalciferol D3

Ergocalciferol D2

Question 5

Types of Vitamin D

Cholecalciferol D3

Answer 5

The animal form of vitamin D

Formed when UV light shines on the skin which converts 7-dehydrocholesterol in the epidermis to cholecalciferol

Question 6

Types of Vitamin D

Ergocalciferol D2

Answer 6

The plant form of vitamin D

When UV light shines on fungi and yeasts which converted ergosterol into ergocalciferol

Question 7

Effects of deficiency of Vitamin D

(Name of each condition) = 1M each

Answer 7

Rickets
Osteomalacia
Osteoporosis
Tooth decay

Question 8

Vitamin D deficiency

Rickets

Answer 8

A bone disease that affects children

Bones become soft and weak

Leads to an increased risk of fractures and bone deformities such as bow legs

Question 9

Vitamin D deficiency

Osteomalacia

Answer 9

A bone disease that affects adults

Bones to become soft and weak due to low bone mass

Leads to an increased risk of fractures and bone pain

Question 10

Vitamin D deficiency

osteoporosis

Answer 10

A bone disease common in older people or post-menopausal women

Causes bones to become brittle and fragile due to a lack of bone mass

Leads to an increased risk of fractures, a stooped posture and back pain caused by a collapsed vertebra

Question 11

Vitamin D deficiency

tooth decay

Answer 11

A condition where the tooth enamel, bone and cementum weaken which leads to an increase in the risk of dental decay

Question 12

RDA of Vitamin D for Adolescents

Answer 12

10 ug

Question 13

RDA of Vitamin D for Children and Adults

Answer 13

10 ug

Question 14

Describe in detail the functions of Vitamin D

3

Answer 14

If blood-calcium levels are too low, vitamin D stimulates the production of a calcium-binding protein needed to absorb more calcium

Vitamin D controls the absorption of calcium and phosphorus into the blood

Vitamin D regulates the amount of calcium and phosphorus in the bones and teeth which helps to maintain density and strength