Vitamin Deficiencies: Iron and Vitamin D

What is the result of anaemia not responding to iron therapy?

Hepatomegaly (correct)
Excessive dryness of skin
Hair loss
Vitamin D deficiency

What is the function of Vitamin D?

Hormone-like function (correct)
Iron-like function
Antioxidant function
Pain relief function

What is a common symptom of anaemia not responding to iron therapy in the skin?

Rash
Excessive dryness (correct)
Itching
Excessive sweating

What is a common symptom of anaemia not responding to iron therapy in the CNS?

Headache (B) Signup and view all the answers

What is a common symptom of anaemia not responding to iron therapy related to hair?

Hair loss (D) Signup and view all the answers

What is the result of the action of 24 hydroxylase?

24,25 dihydroxycholecalciferol (A) Signup and view all the answers

What is the form of 24 hydroxylase that catalyzes the formation of 24,25 dihydroxycholecalciferol?

Inactive form (B) Signup and view all the answers

What is the product of the action of 24 hydroxylase on calciferol?

24,25 dihydroxycholecalciferol (A) Signup and view all the answers

What is the function of the 24 hydroxylase enzyme?

To convert vitamin D into its active form (C) Signup and view all the answers

What is the role of the 24 hydroxylase enzyme in the body?

To convert vitamin D into its active form (C) Signup and view all the answers

What type of protein expression is stimulated by this complex?

Calcium-binding protein (C) Signup and view all the answers

What is the effect of this complex on gene expression?

It stimulates gene expression (D) Signup and view all the answers

What is the primary function of the stimulated protein?

Nerve function (A) Signup and view all the answers

What is the relationship between the complex and the gene?

The complex regulates the gene (C) Signup and view all the answers

What is the outcome of the complex's stimulation of the gene?

Increased protein synthesis (C) Signup and view all the answers

What is the effect of calcitriol on the 1-hydroxylase in the kidney?

It represses the 1-hydroxylase (C) Signup and view all the answers

What is the response of calcitriol to its own synthesis?

It reduces its own synthesis (A) Signup and view all the answers

What is the effect of calcitriol on the 24-hydroxylase in the kidney?

It induces the 24-hydroxylase (C) Signup and view all the answers

What is the overall outcome of calcitriol's action on the enzymes involved in its synthesis?

It reduces its own synthesis (B) Signup and view all the answers

What is the purpose of calcitriol's regulation of the enzymes involved in its synthesis?

To reduce its own synthesis (A) Signup and view all the answers

What is the effect of hypophosphataemia on calcitriol synthesis?

It directly stimulates it (B) Signup and view all the answers

What is the significance of phosphate levels in the body?

They are crucial for vitamin D synthesis (C) Signup and view all the answers

What is the consequence of altered phosphate levels on calcitriol levels?

It directly stimulates calcitriol synthesis (B) Signup and view all the answers

What is the relationship between phosphate levels and vitamin D metabolism?

They are directly proportional (C) Signup and view all the answers

What is the effect of hypophosphataemia on vitamin D metabolism?

It stimulates vitamin D metabolism (C) Signup and view all the answers