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प्रश्न
In human females, each time during maturation and release of egg the inner wall of uterus thickens. Is this thickening permanent? Give reasons.
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उत्तर
No, this thickening of the uterine wall is not permanent.
If the egg gets fertilised, it begins to divide to form an embryo. The embryo gets embedded in the uterine wall resulting in pregnancy. During pregnancy, no more eggs are released and the thickened lining is discharged only when the baby is born.
However, if fertilisation does not occur, the released egg and the thickened lining of uterus along with blood vessels are shed off that resulting in menstruation.
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संबंधित प्रश्न
Word game: Use the clues to work out the words.
Across
3. Protruding voice box in boys
4. Glands without ducts
7. Endocrine gland attached to brain
8. Secretion of endocrine glands
9. Pancreatic hormone
10. Female hormone
Down
1. Male hormone
2. Secretes thyroxin
3. Another term for teenage
5. Hormone reaches here through blood stream
6. Voice box
7. Term for changes at adolescence
________ are the chemical substances, secreted by endocrine glands.
________ is secreted by the ovaries of female.
The hormones secreted by the gonads are controlled by ________.
Milk secretion during lactation is controlled by ________ hormone.
Complete the following sentence.
In females, the uterine wall thickens to receive the ______.
Give a suitable word for the following statement.
The site which responds to a hormone.
Match the hormones given in Column A with their deficiency disease given in Column B.
| Column A | Column B |
| (a) thyroxine | (i) salt imbalance |
| (b) growth hormone | (ii) diabetes |
| (c) Insulin | (iii) goitre |
| (d) Adrenal hormone | (iv) dwarfism |
______ hormone stimulates the testes to produce androgens.
Name the pituitary hormones which influence the gonads (sex organs).
