Biology
Grade-8
Easy
Question
Changes in the internal body chemistry like variations of , , and pH in the blood are detected by
- Photoreceptors
- Proprioceptors
- Nociceptors
- Chemoreceptors
Hint:
Chemical stimuli can be detected by chemoreceptors detect chemical stimuli, such as chemicals that lead to the sense of smell.
The correct answer is: Chemoreceptors
- Chemoreceptors respond to chemicals in taste and smell and in internal changes
- Chemoreceptors are instrumental in the regulation of breathing. Blood concentrations of O2 and CO2 as well as serum pH need to be maintained within a narrow range to ensure the normal function of the body's tissues.
- Changes in the partial pressure of O2 (PO2) are sensed primarily by peripheral O2 chemoreceptors.
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