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प्रश्न
The gland X which is located just below the brain in the human head secretes a chemical substance Y which controls the development of ones and muscles in the body of a person. Secretion of too little of substance Y as well as the secretion of too much of substance Y by the gland X leads to abnormal development of the body of a person.
(a) Name the gland X.
(b) What is the chemical substance Y?
(c) What happens if too little of substance Y is secreted?
(d) What happens if too much of substance Y is secreted?
(e) Name the system of glands in the human body of which gland X is a part.
उत्तर
- X is the pituitary gland. It is located just below the brain.
- The chemical substance (Y) released from the pituitary gland is human growth hormone.
- Under-secretion of growth hormone leads to a condition known as dwarfism. In dwarfism, the person remains very short.
- Over-secretion of growth hormone causes a condition known as gigantism. In gigantism, the person grows very tall.
- The pituitary gland (X) is a part of the endocrine system.
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संबंधित प्रश्न
Name the hormones secreted by the given endocrine glands and specify one function.
Pituitary
What is the name of the system of glands which produces hormones?
What is the name of in-built 'arrangement' in our body which controls the timing and amount of hormones released by various endocrine glands in the body?
Fill in the following blanks with suitable words :
The two examples of effectors are .........and ...........
In what ways are puberty and adolescence result of the activity of some glands in the human body?
Write the names of five endocrine glands found in the human body. Name the hormones secreted by each gland.
Which of the following hormone prepares our body for action in emergency situations?
(a) testosterone
(b) growth hormone
(c) adrenaline
(d) insulin
The pancreas is made up of two parts A and B. The part A secretes insulin whereas part B secretes pancreatic juice.
(a) Which part is functioning as an endocrine gland? Why?
(b) What is insulin and what effect does it have in the body?
(c) Name the disease which can be treated by giving insulin injection.
(d) What does pancreatic juice contain? Where does pancreatic juice go?
(e) Name the life process in which pancreatic juice is made use of.
Assertion: On attaining puberty, breast size increases and reproductive organs develop in females.
Reason: Ovaries release the hormone progesterone in females.
Name the hormone secreted in scary situations by animals. Write any three responses which enable the animal body to deal with it.
