Q30 of 65 Page 230

Ramesh a class X student, goes with his mother to bring milk from a nearby dairy farm. On a number of occasions, he had seen the dairy owner giving an injection to the buffalo before milking. Ramesh being concerned discussed with the dairy owner, about the harmful effects of such practice. Read the above passage and answer the following questions.

(i) Which chemical was being injected by dairy owner in buffalo before milking it and why?


(ii) What other major functions this chemical performs in buffalo or adult human females? Also, list two common terms used for the chemical based on its functions.


(iii) Why should such practice be discouraged? Comment.


(iv) What values were shown by Ramesh?

(i) Progesterone was being injected in buffalo to increase the milk production.


(ii) Progesterone is responsible maintain the menstrual cycle in the women. Milk-producing and sex hormone.


(iii) This practice should be discouraged as it may affect the buffalo as well as the quality of milk which can have an adverse effect on us.


(iv) Responsible, good knowledge skills and aware.


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28

(i) Suggest an explanation for the fact that the chemicals produced by endocrine glands arc usually in the form of small molecules.

(ii) Write any three endocrine glands and chemically produced by them.

 29

An endocrine gland P is located below the stomach in the human body. The gland P secretes a hormone H. The deficiency of hormone H in the body leads to a rise in blood sugar, due to which a disease D is caused.

 31

Recently. The science teacher discussed with students ‘Control and Coordination in Animals’. He told children that two systems, i.e. the nervous system and endocrine system help to regulate all body functions. He also told becoming addict to alcohol drinking and how alcohol is affecting their body.

Read the above passage and answer the following questions.


(i) Which hormones are responsible for the onset of adolescence


(ii) How does alcohol drinking affect the nervous system?


(iii) What role the government should play to check alcohol drinking especially by adolescents? Give at least two suggestions.


(iv) What values were shown by the teacher?

 32

In order for quick harvest, a farmer added product A in the field. Later, the effects of another product were observed, i.e. writing of leaves and dormancy in seeds. Read the above passage and answer the following questions.

(i) What is the name of product A? List its two functions.


(ii) Can you guess what was applied instead of product A? what is its mode of action?


(iii) Can you suggest two naturally occurring plant hormones and their actions?


(iv) What values should be present in agricultural practitioners?