Feeling of thirst is due to

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(D) The feeling of thirst is a physiological response to dehydration or increased blood plasma osmolarity.$(a)$ Fever leads to increased body temperat

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All of the above

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(D) The feeling of thirst is a physiological response to dehydration or increased blood plasma osmolarity.$(a)$ Fever leads to increased body temperature and fluid loss through sweating and respiration,causing thirst.$(b)$ Exercise causes loss of water and electrolytes through sweat,leading to increased blood plasma concentration,which triggers the thirst center in the hypothalamus.$(c)$ $A$ significant fall in glucose levels can also influence metabolic signals that contribute to the sensation of thirst.Since all these factors contribute to the body's need for water,the correct answer is $(d)$.

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