Tag: nervous system of man

Questions Related to nervous system of man

Multiple choice biology nervous system of man human nervous system the structure of brain the human brain

Crus cerebrum is

  1. The posterior part of cerebrum

  2. The anterior part of cerebrum

  3. The part of mesencephalon

  4. None of the above

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The mesencephalon is also called the midbrain. It is a small and reduced part of the brain which connects the forebrain with the brainstem. Its anterior part consists of two longitudinal myelinated nerve fibres called the cerebral peduncles or crus cerebrum or the crura cerebri. The posterior part is made of four colliculi that are called the corpora quadrigemina.

Hence, the correct answer is 'The part of mesencephalon'

Multiple choice biology nervous system of man human nervous system the structure of brain the human brain

A chemosensitive area adjacent to rhythm centre in the brain is highly sensitive to
I. Oxygen II. $CO _2$ III. $H^+$ ions IV. $HCO _3$ ions V. Water.

  1. I only

  2. II and III only

  3. I and IV only

  4. V only

  5. I and V only

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The chemosensitive area near the rhythm center in the medulla is highly sensitive to changes in CO2 concentration and H+ ion concentration in the blood, which regulate the rate of respiration.