Question

Which of the following statements are true about the brain?

(i) The main thinking part of the brain is the hindbrain

(ii) Centers of hearing, smell, memory, sight etc. are located in forebrain.

(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hindbrain.

(iv) Cerebellum does not control the posture and balance of the body.

• A. (i) and (ii)
• B. (i), (ii) and (iii)
• C. (ii) and (iii)
• D. (iii) and (iv)

Answer 1

The correct option is C

(ii) and (iii)

The correct option is option C.

Explanation of correct option:

Statement (ii):

1. The brain is an organ, which is a component of the nervous system.
2. It is the center for control and coordination, it is a complex organ in which nerve cells are aggregated.
3. The forebrain is the major part of the brain, it controls and monitors behavior and other prime physiological activities.
4. The different components of the forebrain are the hypothalamus, cerebrum, limbic system, and thalamus.
5. Different activities like smell, hearing, sight, and memory are monitored by specialized parts of the forebrain.

Statement (iii):

1. The hind brain’s medulla part deals with the coordination of different involuntary activities like control of blood pressure, vomiting, and salivation.

Explanation of incorrect options:

Statement (i):

1. The hindbrain is not the prime thinking part of the brain.
2. All the thoughts and processes are monitored by the forebrain, which is the largest part of the brain.

Statement (iv):

1. The cerebellum is the component of the hindbrain, which monitors all the kinds of involuntary activities comprising balance and posture of the body.

Final answer: The correct statements are (ii) and (iii).