Q.

Which of the following hormones are antagonistic to each other? 

(i) Insulin and glucagon, (ii) Calcitonin and parathormone, (iii) Epinephrine and norepinephrine

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a

(i) and (ii)

b

(i) and (iii)

c

(i), (ii) and (iii)

d

(ii) and (iii)

answer is D.

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Detailed Solution

Insulin and glucagon are antagonistic to each other, insulin is hypoglycemic hormone whereas glucagon is hyperglycemic hormone.

Similarly calcitonin is hypocalcemic hormone and parathormone is hypercalcemic hormone, hence they are antagonistic to each other.

Epinephrine and norepinephrine is not antagonistic to each other.

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