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  • Heart rate is increased by the impulses from  Option: 1 Aorta  <d

Heart rate is increased by the impulses from

 

Option: 1

Aorta

 


Option: 2

Carotid sinus

 


Option: 3

Vena cava

 


Option: 4

None of the above

 


Answers (1)

best_answer
 

As we have learnt:

Neural regulation 

  • The cardiac centres of the body are placed in the medulla oblongata of the brain
  • It is formed of 2 parts i.e. cardio-inhibitor and cardiac-accelerator 
  • Cardio-inhibiting  part reduces the rate of heart beat while cardio-accelerating part increases the rate of heart beat
  • Cardio inhibitor is connected to the heart with the help of vagus nerve
  • Cardio accelerator is connected to the heart via sympathetic nerve fibres.
  • There are Sensory fibres that extend from the receptors (in the superior vena cava, aorta, and carotid sinuses)  to the cardiovascular centres in the medulla oblongata
  • The impulses from aorta and carotid sinus decrease the heart rate 
  • The impulses from vena cava increase the heart rate

So,

The impulses from vena cava increase the heart rate. Hence, the correct answer is option c.

Posted by

vishal kumar

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