Question:
The autonomic nervous system controls cardiac activities in response to various inputs from the following EXCEPT:
The autonomic nervous system controls cardiac activities in response to various inputs from the following EXCEPT:
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Cardiac control uses baroreceptors, chemoreceptors and proprioceptors, but not photoreceptors.
Updated On: Nov 12, 2026
- Photoreceptors.
- Proprio-receptors.
- Baroreceptors.
- Chemoreceptors.
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
The cardiovascular centre in the medulla adjusts heart rate through sympathetic and vagus nerves.
Step 2: Inputs received
It receives signals from baroreceptors (blood pressure), chemoreceptors (blood gases and pH) and proprioceptors (muscle and joint movement).
Step 3: Identify the exception
Photoreceptors of the retina serve vision and do not feed into cardiac control.
Final Answer:
Photoreceptors are the exception. \[ \boxed{\text{(A) }\text{Photoreceptors.}} \]
The cardiovascular centre in the medulla adjusts heart rate through sympathetic and vagus nerves.
Step 2: Inputs received
It receives signals from baroreceptors (blood pressure), chemoreceptors (blood gases and pH) and proprioceptors (muscle and joint movement).
Step 3: Identify the exception
Photoreceptors of the retina serve vision and do not feed into cardiac control.
Final Answer:
Photoreceptors are the exception. \[ \boxed{\text{(A) }\text{Photoreceptors.}} \]
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