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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.
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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
Why are some patients of diabetes treated by giving injections of insulin?
Name one hormone secreted by the pituitary gland
What is the name of the system of glands which produces hormones?
Name one gland which acts only as an endocrine gland.
Name one gland which acts only as an exocrine gland.
Name one gland which acts both as an endocrine gland as well as an exocrine gland.
If sugar is detected in the urine of a person, name the disease he is suffering from.
What substances are made by endocrine glands?
How does chemical coordination take place in human beings?
Which hormone prepares the body for action?
Which hormone gives girls soft skin?
Name the disease which occurs in adults due to the deficiency of iodine in the diet. What is the main symptom of this disease?
odine is necessary for the synthesis of which of the following hormone?
(a) adrenaline
(b) auxin
(c) thyroxine
(d) insulin
The hormone which is associated with male puberty is called :
(a) oestrogen
(b) adrenaline
(c) testosterone
(d) progesterone
The faulty functioning of an endocrine gland can make a person very short or very tall. This gland is :
(a) thyroid
(b) pineal
(c) adrenal
(d) pituitary
The underactive endocrine gland which causes goitre is :
(a) pancreas
(b) thyroid
(c) adrenal
(d) pituitary
The endocrine gland whose malfunctioning causes diabetes disease is :
(a) pituitary
(b) pineal
(c) parathyroid
(d) pancreas
A and B are two pairs of glands that are present in the human endocrine system. The pair A is found only in females, whereas B is present only in males. Glands A make and secrete two hormones C and D, whereas glands B make and secrete only one hormone E. In addition to hormones, Glands A make gametes F, whereas glands B make gametes G.
(a) What are the glands A?
(b) What are the hormones C and D?
(c) What are the glands B? Name the hormone E.
(d) What are the gametes F and G?
(e) Which event in the life of males and females is associated with the secretion of the hormones C, D and E?
