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If given a choice between plain water and salt water, normal rats will drink plain water,...

If given a choice between plain water and salt water, normal rats will drink plain water, but adrenalectomized rats will drink salt water. Why?

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Answer #1

Adrenaline hormone involved in maintaining sodium concentration through sodium-potassium pump.

Adrenalectomized is the condition of removed adrenal gland.

It is obvious that adrenaline hormone is secreted by adrenal gland. So these adrenalectomized rats cannot have salt sodium in the system.

Inorder to make salt levels in the system, brain produces cravings for salt i.e sodium chloride.

It is the reason that adrenalectomized rats drinks salt water and normal rats not having cravings for sodium, so it drinks plain water.

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