Quiz Questions And Answers

Can retinoic acid be converted back to retinal

Yes

If the eyes experience a flash of light, vision will not be restored until what is reformed

lodopsin

Rhodopsin

Opsin

Nyctalopia is

Total blindness

Night blindness

Trouble seeing in bright light

If amounts of retinol in the blood are not adequate to replace the retinal lost during the visual cycle then the eyes will recover from flashes of light

Rapidly

Slowly

Vitamin A is necessary for the differentiation and maintenance of which cells

Goblet & epithelial cells

Goblet & endocrine cells

Endocrine & epithelial cells

In a vitamin A deficiency the mucous secreting cells are replaced by producing cells in many body tissues.

Epithelial cells

Keratin producing cells

Collagen producing cells

Vitamin A is important the normal growth and remodelling of

Skin

Bone

Cartilage

Due to its role with iron metabolism and cell differentition vitamin A is involved in the production of haemoglobin and red blood cells

True

False

How long will it take a vitamin A defeiciency to show

3 months

6 months

One year

One to two years

The first detectable symptom of a vitamin A deficiency is

Poor health

Night blindness

Brittle bones

ANSWERS

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