Zoology - Breathing and Exchange of Gases Question with Solution | TestHub

ZoologyBreathing and Exchange of GasesHuman Respiratory SystemEasy2 minPYQ_2015

ZoologyEasysingle choice

When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?NEET 2015 (Phase 1)

Options:

Answer:

Solution:

The rise in $C O_{2}$ concentration stimulates chemoreceptors present in the aorta and carotid artery, which stimulates the respiratory centre. The respiratory centre is not directly sensitive to oxygen concentration & hence desire to breathe is induced by rising in $C O_{2}$ the concentration of blood.

Stream:NEETSubject:ZoologyTopic:Breathing and Exchange of GasesSubtopic:Human Respiratory System

⏱ 2mℹ️ Source: PYQ_2015

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