Tag: science & technology

Hyperglycemia means abnormally high blood glucose levels, typically above 126 mg/dL when fasting or 180 mg/dL after meals. This condition is a hallmark of diabetes mellitus. The prefix hyper- means elevated or excessive, while glycemia refers to sugar concentration in blood.

Paper is measured in reams (typically 500 sheets) for quantity and caliper for thickness, expressed in thousandths of an inch or micrometers. This dual measurement system reflects how paper is manufactured and used in printing. Other listed materials use different units like troy ounces or liters.

Vitamin A is found in animal sources like liver, egg yolk, milk, and butter (as retinol) and plant sources containing carotenoids like carrots and green vegetables (as beta-carotene which converts to Vitamin A). Option C is the most comprehensive and accurate list covering both categories.

Vitamin B2 is the chemical name for Riboflavin. Thiamine is Vitamin B1, Calciferol is Vitamin D, and Niacin is Vitamin B3. Riboflavin is essential for energy metabolism and cellular function.

Pernicious anemia is caused by Vitamin B12 deficiency, specifically due to lack of intrinsic factor needed for B12 absorption. It causes megaloblastic anemia. Vitamin A, C, and E deficiencies cause different conditions (night blindness, scurvy, and neurological issues respectively).

Vitamin E (tocopherol) deficiency causes reproductive failure in rats and other animals. Early research showed that rats on Vitamin E-free diets became sterile. This is how Vitamin E was discovered and named 'tocopherol' from Greek words meaning 'to bear offspring'.

Pellagra is caused by Vitamin B3 (Niacin) deficiency. It is characterized by the '3 Ds' or '4 Ds': dermatitis, diarrhea, dementia, and death if untreated. It was common in populations dependent on corn as a staple food.

Scurvy is caused by Vitamin C (ascorbic acid) deficiency. Sailors on long voyages without fresh fruits and vegetables developed scurvy. The discovery that citrus fruits prevented scurvy was a major medical breakthrough. The question has a typo 'discover y' which likely meant 'Vitamin C'.

Vitamin K deficiency causes bleeding disorders because Vitamin K is essential for blood clotting. It is required for the synthesis of clotting factors II, VII, IX, and X. The question misspells 'clot' as 'clott'.