MBChB 205 Test 1

Deoxyadenosylcobalamin is important in...

Raised plasma gastrin is useful in detecting reasons for B12 deficiency as it...

Anything we consume as omnivores from herbivorous animal products contains B12

Deficiency of which vitamin results in xerophthalmia (blindness)

Erythrocyte haemolysis and neuromuscular dysfunction are symptoms of a deficiency of what Vitamin?

Intrinsic factor-B12 complex is absorbed in the

Intrinsic factor is secreted by:

Vitamin B12 activates folate (and itself) in the cell by:

Haemorrhagic syndrome is the primary symptom of deficiency of which vitamin?

R binders are broken off Vitamin B12 in the ______ of the small intestine.

Which of these relationships for fat soluble vitamins is incorrect?

The neuropathy associated with B12 deficiency is known as dry beriberi

What is the best answer to describe dietary sources of Vitamin E?

B12 must be bound to _____ in order to be absorbed in the ileum.

UV from sunlight converts 7-dehydrocholesterol (a precursor made in the liver from cholesterol) to Previtamin D3, which is then converted to Vitamin D3. Vitamin D3 is hydroxylated in the liver to 25-hydroxy vitamin D3 and then hydroxylated again in the kidney to 1,25-hydroxy vitamin D3 (the active form). At what stage in this pathway does Vitamin D from food enter?

Which statement is false regarding the absorption of Vitamin K?

Vitamin B12 is released from food by the action of:

What is the precursor of Vitamin D

In order to release B12 that has been inappropriately bound to other proteins enzymes from what organ are released into the duodenum?

Salivary glands produce ______ (glycoprotein) which binds to B12 in the stomach to avoid degradation?

The majority of Vitamin K comes from..?

Toxicity of which vitamin creates a risk for masking Vitamin B12 deficiency

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Which of these is not one of the four normal physiological processes required for absorption of B12?

Which answer BEST describes dietary sources of Vitamin A (Retinoids)

Which of these factors affect production of Vitamin D from UV-B radiation?

Which of the following is not a symptom of Vitamin A toxicity?

What is the name of the test that compares B12 absorption with B12-IF complex absorption? (______ test)

Which statement is true regarding Vitamin K

Which of the following is not a disease INFLUENCED by deficiency of Vitamin D?

What is the main toxicity symptom of Vitamin E?

High doses of Vitamin B12 are toxic.

Methylcobalamin is important in...

Which of these statements is true in regards to Vitamin D

The neuropathy associated with B12 deficiency is known as sub-acute combined degeneration of the spinal cord

Retinoic Acid is important for:

B12 replacement is usually given orally.

Cleavage of Fibrinogen (a soluble protein) to Fibrin (a solid clot) is catalysed by the enzyme Thrombin. What Vitamin is important for the activation of Thrombin?

Which of these statements regarding B12 is FALSE

The alkaline pH of the ________ helps proteases function to remove R-binders from B12 so that Intrinsic Factor can bind.

What food sources contain Vitamin D? (best description)

What is not evidence of autoimmune gastritis?

The body has poor stores of B12, so when intake is low deficiency symptoms are apparent almost immediatly

What form of this fat-soluble vitamin is important for vision?

What is the chief function of Vitamin E in the body?

Deficiency of B12 is known as hypocobalinaemia and exhibits itself as megaloblastic anaemia.

What vitamin is important for restoring the function of Vitamin E after its inactivation through free-radical scavenging?

Which one of these is not a rich source of Vitamin B12?

Which of the following is NOT a symptom of Vitamin A deficiency

Gastric acid releases food-bound B12