Вопрос № 223468 - Английский язык

Прочитайте текст и ответьте на вопрос:
What are vitamins essential for?
The vitamins as a class are not chemically related, and, they are classified according to their solubility and chief therapeutic effect into two groups: 1) water-soluble vitamins, 2) fat-soluble vitamin group. It is known to be essential for the maintenance of normal epithelial tissue.

Прочитайте текст и выполните задания
A vitamin
1. A vitamin is an organic compound required by an organism as a vital nutrient in limited amounts. An organic chemical compound is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet.
2. Vitamins have diverse biochemical functions. Some have hormone-like functions as regulators of mineral metabolism (such as vitamin D), or regulators of cell and tissue growth and differentiation (such as some forms of vitamin A). Others function as antioxidants (e.g., vitamin E and sometimes vitamin C). The largest number of vitamins (such as B complex vitamins) functions as precursors for enzyme cofactors that help enzymes in their work as catalysts in metabolism.
3. Until the mid-1930s, when the first commercial yeast-extract vitamin B complex and semi-synthetic vitamin C supplement tablets were sold, vitamins were obtained solely through food intake, and changes in diet (which, for example, could occur during a particular growing season) usually greatly altered the types and amounts of vitamins ingested. However, vitamins have been produced as commodity chemicals and made widely available as inexpensive semisynthetic and synthetic-source multivitamin dietary and food supplements and additives, since the middle of the 20th century.
Завершите утверждение согласно содержанию текста.
Formerly people could get vitamins only …

Прочитайте текст и выберите утверждение, соответствующее содержанию текста
Headache is a symptom of many diseases. It may occur with common cold, fever, eye strain or hunger. It may accompany mumps, malaria, measles and many other infections. But if severe headache persists you should consult a doctor. Frequent and persistent headache may sometimes be a symptom of brain tumour.

Прочитайте текст и выберите утверждение, соответствующее содержанию текста
A man slipped and injured his leg. The man’s friend called an ambulance and when it arrived, transported him to the hospital. Two orderlies carried him to the receiving – ward on a stretcher and placed him on a couch. The man complained of a bad pain in his leg and suffered very much. The surgeon examined the patient carefully. His ankle and foot were swollen, but the skin was normal in colour.

Прочитайте текст и выберите утверждение, соответствующее содержанию текста
When you are ill you consult the doctor. He prescribes you the treatment and writes out a prescription.
At the chemist’s you can get patent medicines of all kinds: ampules of glucose and camphor for injections, different pills, tablets and powder, cough mixtures, heart drops, nasal drops, vitamins, cod liver oil, ointments, sedatives, bottles of iodine.

Прочитайте текст и выберите утверждение, соответствующее содержанию текста
A human body is a perfectly organized creation with millions of blood vessels. It has an extremely powerful engine that pumps gallons of blood every day. A human brain is a fantastic mind machine. It contains around 100 billion cells, equal to the number of stars in the Milky Way.