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प्रश्न
Name and describe hormones secreted by ovaries.
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उत्तर
- Estrogen: It is secreted by developing follicles. Estradiol is the main oestrogen. It is responsible for secondary sexual characters in female.
- Progesterone: It is secreted by the corpus luteum of the ovary after ovulation. This hormone is essential for thickening of uterine endometrium, thus preparing the uterus for implantation of fertilized ovum. It is responsible for the development of mammary glands during pregnancy. It inhibits uterine contractions during pregnancy.
- Relaxin: It is secreted by the corpus luteum of the ovary at the end of the gestation period. It relaxes the cervix of the pregnant female and ligaments of the pelvic girdle for easy birth of a young one.
- Inhibin: It is secreted by the corpus luteum. Inhibin inhibits the FSH and GnRH production.
संबंधित प्रश्न
Gigantism and Acromegaly are due to :
A. Hyposecretion of Thyroxine
B. Hyposecretion of Growth hormone
C. Hypersecretion of Thyroxine
D. Hypersecretion of Growth hormone
Rewrite the correct form of the statement: Cretinism is caused due to deficiency of Adrenaline.
Cretinism and Myxoedema are due to
A. Hypersecretion of thyroxin
B. Hypersecretion of growth hormone
C. Hyposecretion of thyroxin
D. Hyposecretion of growth hormone
If you stand to make your maiden speech before a large audience, your mouth dries up and heart rate increases. What brings about these changes?
Complete the following table by filling in the blanks numbered 1 to 7.
| Gland | Hormone secreted | Effect on body |
| (1) ______ | (2) ______ | Regulates basal metabolism |
| Pancreas ("beta" cells) | (3) ______ | Controls blood sugar |
| (4) ______ | (5) ______ | Increases heart beat |
| (6) ______ | Thyroid stimulating hormone | (7) ______ |
Some adult women may develop facial hairs. What may be the cause for it?
Answer the questions after observing the diagram given below.
- What acts as the first messenger?
- Why can’t hormones like catecholamines enter their target cells through plasma membrane?
- Name the mode of hormone action shown in the diagram.
Cortisol is secreted by the adrenal cortex in response to stress
In addition to its function in a stress response, it functions in negative feedback by ______.
Which of the following hormone is responsible for the emotional state as fear, anger, pain and causes, rise of blood pressure and rate of heartbeat?
Give an account of secretion of various parts of Adrenal cortex.
