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Chemical Coordination and Integration

Short Answer Type

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

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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.

Melanocyte stimulating hormone is secreted by intermediatory lobe of pituitary gland or pars intermedia. It acts on the melanocytes and regulates the pigmentation of the skin.

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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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