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Chemical Coordination and Integration

Short Answer Type

91. Write hormones secreted by placenta and the entric epithelium of stomach.

Placenta : It secretes a human chorionic gonadotrophin hormone (hCG). It stimulates the corpus luteum to secrete progesterone.

Enteric epithelium of stomach : It secretes gastrin hormone into stomach. The gastrin hormone stimulates gastric glands to secrete gastric juice.

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92. What two hormones are produced by the adrenal medulla ?

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93. From what chemical compounds are all steroid hormones derived ? Mention at least two examples of steroid hormones.

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Long Answer Type

94.

Explain the following :

(1) Insulin lowers the blood sugar level.

(2) Adrenal medulla and the sympathetic nervous system function as a closely integrated system.

(3) Pituitary gland regulates the reproductive system.

(4) Feed back system controls the blood level of many hormones.

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95. In general, how do steroid hormones effect changes in their targets cells ?

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96. Write a note on Melanocyte stimulating hormone.

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Short Answer Type

97. What hormones are produced when the body's blood glucose level drops below normal? How do these hormones act to return the level to normal ? What hormone is produced when the body's blood glucose levels become elevated ? How does this hormone act to return the level to normal?

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Long Answer Type

98. Distinguish between hormones and enzymes.

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99. What is diabetes ? Which hormonal deficiency results in this disease ? How does this affect an individual ability to use glucose? What are some possible treatments for diabetes mellitus?

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Short Answer Type

100. Which endocrine glands are controlled by the secretion of other glands.

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