Q9
1 markMCQSection A

Select out of the following a gland which does NOT occur as a pair in the human body :

Control and Coordination
Endocrine Glands in Humans

Options

(A)Pituitary
(B)Ovary
(C)Testis
(D)Adrenal
Official Answer

The correct option is A (Pituitary).

Pituitaryunpairedsingle gland

Marking Scheme

  • 1Correct option: A (Pituitary) - 1 Mark

Hint

Think about which of these glands is located centrally in the brain as a single structure, while the others are located on the left and right sides of the body.

Quick Oral Answer

The pituitary gland is an unpaired gland located at the base of the brain, whereas ovaries, testes, and adrenal glands are paired organs.

Analysis & Explanation

In the human endocrine system, some glands are paired while others are single (unpaired):

  • Pituitary gland (Option A): It is a single, unpaired gland located at the base of the brain.
  • Ovary (Option B): Ovaries are paired female gonads located on either side of the lower abdomen.
  • Testis (Option C): Testes are paired male gonads located inside the scrotum.
  • Adrenal (Option D): Adrenal glands are a pair of glands, with one gland situated on top of each kidney.

Therefore, the pituitary gland is the one that does NOT occur as a pair.

Common Mistakes

  1. 1Confusing adrenal glands as a single gland, whereas there are two adrenal glands, one on top of each kidney.

Interesting Facts

The pituitary gland is often called the 'master gland' because it secretes hormones that control the functioning of many other endocrine glands in the body.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2024?

This question carries 1 mark in the CBSE Class 10 Science 2024 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Control and Coordination" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Endocrine Glands in Humans" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2024 paper?

This is a MCQ question from Section A in the CBSE Class 10 Science 2024 paper.