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CNS

The breathing...

Question

The breathing rate in humans is controlled by

A

Thalamus

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B

Hypothalamus

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C

Cerebellum

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D

Medulla oblongata

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Solution

The correct option is D
Medulla oblongata

The breathing rate in human is controlled by the medulla oblongata in which inspiratory and expiratory centres are located.

The inspiratory centre or dorsal respiratory group (DRG) causes inspiration.

The expiratory centre or ventral respiratory group (VRG) causes either inspiration or expiration depending on which neurons in the group are stimulated.

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Q. Match these parts with their functions:

(Medulla oblongata, cerebellum, forebrain, thalamus, cerebral cortex, hindbrain, pons, hypothalamus)
a) Sleep centre and respiratory centre.
b) Several reflexes involved in the regulation of heartbeat, blood vessel contraction, breathing, etc.
c) Consists of cerebrum, thalamus, and hypothalamus.
d) Motor and sensory areas.
e) A major conducting centre for sensory and motor signaling.
f) Regulation of sexual behavior.
g) Consists of the pons, cerebellum, and medulla oblongata.
h) Coordinates the group movements of voluntary muscles, as in walking or running.

Q. (i) Cerebrum, cerebellum, thalamus, hypothalamus.

Q. Statement1: Rate of breathing is regulated by respiratory centres present in the medulla oblongata.
Statement 2 : Changes in the

C O_{2}

level of the arterial blood control the rate of breathing.

Q. Which of the following is controlled by medulla oblongata?

Q. Among thalamus, hypothalamus, cerebral cortex, cerebral medulla, cerebellar cortex, cerebellar medulla, pons and medulla, which are composed of grey matter and which are with white Matter? Support your answer with the reason

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