Question

Assertion :Adrenal cortex can be removed without causing death. Reason: Adrenal cortex is not vital for survival.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is D Both Assertion and Reason are incorrect

Adrenals or suprarenals are two conical pyramid shaped glands, one immediately above each kidney. Each adrenal is made up of an outer layer called adrenal cortex and a central portion called adrenal medulla. The cortex and the medulla secrete different hormones and are regulated in different ways. Adrenal cortex is vitally important for life because it secretes a number of steroid hormones belonging to three broad groups viz. glucocorticoids, mineralocorticoids and sex corticoids. Hence its destruction or removal kills the animal. On the other hand, adrenal medulla is not vital for survival and may be removed without causing death. Adrenal medulla helps the body to combat against stress or emergency conditions by secreting two hormones viz. adrenaline and noradrenaline.

So, the correct answer is 'Both Assertion and Reason are incorrect'.