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Chemical Coordination and Integration

Long Answer Type

81.

Write the name and the source of hormones regulating the following :

(a) Uterine changes in pregnancy.
(b) Urinary elimination of water.
(c) Metamorphosis of tadpoles.
(d) Plasma Ca⁺² level.
(e) Na⁺ and K⁺ metabolism.
(f) Blood sugar level.
(g) Uterine contractions at the time of child's birth.

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Short Answer Type

82. Write a note on adrenocroticotrophin hormone, thyroid stimulating hormone.

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Long Answer Type

83. Discuss somatotrophic or growth hormone. State the abnormalities cause due to hyposecretion or hypersecretion of growth hormone?

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84. Why is the endocrine system considered a chemical extension of the nervous system ?

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85. Briefly explain about pancreas.

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86. Explain diabetes mellitus.

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87. What are the principal hormones produced by the anterior pituitary? What function does each serve ?

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88. Describe the hormones secreted by ovaries.

Ovaries : The ovaries secrete the following hormones :

(1) Estrogen : It is secreted by graafian follicles. Estrogen performs the following functions :
a. It brings ovulation.
b. It brings development of genital ducts.

(2) Progesterone : It is secreted by corpus luteum. The progesterone help in the implantation. The progesterone also maintains the enlargement of uterine wall during pregnancy.

(3) Relaxin : It is secreted by corpus luteum (part of graafian follicle after ovulation) at the end of gestation period. It enlarges the pelvic region during the childbirth.

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89. What hormones are secreted by the posterior pituitary gland ? What function does each serve ? Where are these hormones actually produced ?

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Short Answer Type

90. Give one example of pairs of antagonistic hormones associated with basal metabolism ? How does each pair function?

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