Vitamins are believed to belong to ancient elementary organic compounds and to exist before life ori...: ответ на тест 1006855 - Английский язык

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What do vitamins belong to?
Vitamins are believed to belong to ancient elementary organic compounds and to exist before life originated on Earth. According to Academician Chagovets vitamins took part in the building up of as primary organism together with such “blocks” of living matter as nucleic acids, proteins, aminoacids.

Vitamins are believed to belong to ancient elementary organic compounds and to exist before life originated on Earth. According to Academician Chagovets vitamins took part in the building up of a primary organism together with such “blocks” of living matter as nucleic acids, proteins, aminoacids.
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What do vitamins belong to?

Vitamin A is an unsaturated cyclic alcohol.
The source of all vitamin A is in the carotenoid pigments, the yellow-coloured compounds occurring in all chlorophyll-containing plants.
In pure form it is a pale yellow oil, soluble in fat solvents, having an ultra-violet absorption spectrum. The ester forms of the vitamin have been found to possess greater stability than the free alcohol.
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Vitamin С (ascorbic acid) is essential for the normal functioning of living cell and is involved in many enzymatic reactions. It is required for the development of cartilage, teeth and bones, for wound healing and aiding the absorption of iron from the intestine. Gross deficiency causes scurvy.
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To the ancient Egyptians, the heart was the centre of mental activity – the brain was unimportant. However, over the centuries the relationship between the brain and thought, language, and the senses has been revealed. The human brain is built around nerve cells called neurons from which Neurology gets its name. There are billions of neurons and they are in constant communication with other nerve cells. The brain deals not only with reasoning and language but also with autonomic functions (such as sweating and breathing that are not under conscious control). It also processes emotions and generates hormones.
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There is interconnection between …

Medical terms related to blood often begin with the prefix haem-, which comes from the Greek word for blood. Therefore, the study of blood is haemotology, haemophilia is a disease of the blood, and haemophobia is an abnormal fear of blood. New blood is being constantly made by the bone marrow in a process called haemogenesis, bleeding is technically known as a haemorrage, and a bruise is a haemotoma.
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The prefix haem- means …