Vitamins: Water Soluble B-complex and C

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What is the primary function of Vitamin A in the human body?

Acting as an antioxidant and constituent of visual pigments (correct)

Maintaining healthy skin and hair

Assisting in the absorption of calcium

Regulating blood clotting

Which of the following vitamins is not a B-complex vitamin?

Vitamin B1

Vitamin A (correct)

Vitamin B9

Vitamin B5

What is the primary deficiency of Vitamin D?

Impaired immune function

Skin problems

Weakened bones (correct)

Night blindness

Which of the following foods is deficient in Vitamin B7 (biotin)?

Raw egg whites Signup and view all the answers

What is the primary function of Vitamin C?

Acting as an antioxidant and constituent of connective tissue Signup and view all the answers

Which of the following vitamins is stored in the liver for approximately 3-4 years?

Vitamin B12 Signup and view all the answers

What is the primary function of thiamine pyrophosphate (TPP)?

To act as a cofactor for several dehydrogenase enzyme reactions Signup and view all the answers

What is the primary concern when prescribing isotretinoin to treat severe cystic acne?

The risk of teratogenicity Signup and view all the answers

What is the purpose of administering thiamine before dextrose in patients with chronic alcohol overuse or malnutrition?

To reduce the risk of Wernicke encephalopathy Signup and view all the answers

Which vitamin is found in liver and leafy vegetables?

Vitamin A Signup and view all the answers

What is the primary consequence of vitamin B1 deficiency?

Impaired glucose breakdown and ATP depletion Signup and view all the answers

What is the diagnosis of vitamin B1 deficiency based on?

The increase in RBC transketolase activity following vitamin B1 administration Signup and view all the answers

What is the primary function of biotin in the body?

Serving as a cofactor for carboxylation enzymes Signup and view all the answers

What is the main consequence of a biotin deficiency?

Dermatitis, enteritis, and alopecia Signup and view all the answers

What is the role of tetrahydrofolic acid (THF) in the body?

A coenzyme for 1-carbon transfer/methylation reactions Signup and view all the answers

Which of the following can induce a deficiency of biotin?

Excessive consumption of raw egg whites Signup and view all the answers

Where is the small reserve pool of folate primarily stored in the body?

The liver Signup and view all the answers

What is the primary source of folate in the body?

Dietary intake of leafy green vegetables Signup and view all the answers

What is the common symptom of pellagra due to vitamin B3 deficiency?

All of the above Signup and view all the answers

What is the underlying cause of pellagra-like symptoms in Hartnup disease?

Deficiency of neutral amino acid transporters in proximal renal tubular cells and on enterocytes Signup and view all the answers

What is the function of vitamin B5 in the body?

It is a cofactor for acyl transfers and fatty acid synthase Signup and view all the answers

What is the consequence of vitamin B6 deficiency?

Dermatitis, enteritis, and alopecia Signup and view all the answers

What is the conversion product of vitamin B6?

Pyridoxal phosphate (PLP) Signup and view all the answers

What is the effect of taking aspirin before niacin?

It reduces the risk of facial flushing Signup and view all the answers

What is the primary manifestation of vitamin B1 deficiency?

Glossitis and diarrhea Signup and view all the answers

Which vitamin functions as an antioxidant and is essential for normal differentiation of epithelial cells?

Vitamin A Signup and view all the answers

What is the primary benefit of niacin in resource-limited areas?

Treats common deficiencies in resource-limited areas Signup and view all the answers

What is the primary function of vitamin B2?

Precursor to coenzymes FAD and FMN Signup and view all the answers

What is the primary consequence of untreated vitamin B1 deficiency?

Beriberi Signup and view all the answers

Which of the following is a manifestation of vitamin A deficiency?

Night blindness Signup and view all the answers

What is the primary function of Vitamin B7 (biotin) in the body?

Serving as a cofactor for carboxylation enzymes Signup and view all the answers

What is the primary consequence of a deficiency of Vitamin B9 (folate)?

Disrupted synthesis of nitrogenous bases in DNA and RNA Signup and view all the answers

What can induce a deficiency of Vitamin B7 (biotin)?

Long-term use of antibiotics Signup and view all the answers

What is the primary site of absorption of Vitamin B9 (folate)?

Jejunum Signup and view all the answers

What is the primary function of tetrahydrofolic acid (THF)?

Acting as a coenzyme for 1-carbon transfer/methylation reactions Signup and view all the answers

What is the primary source of Vitamin B9 (folate)?

Gut microbiota and leafy green vegetables Signup and view all the answers