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The given figure illustrates a section t...

The given figure illustrates a section through the human heart.

Which labelled part represents the site for the generation of action potential in human heart ?

A

A

B

B

C

C

D

D

Text Solution

Verified by Experts

The correct Answer is:
A
A' is SA node that is the site for generation of action potential in human heart.
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NCERT FINGERTIPS ENGLISH-BODY FLUIDS AND CIRCULATION-Body Fluids And Circulation
  1. In which one of the following pairs, two terms represent the same thin...

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  2. Read the following statements and select the correct ones (i) Nodal ...

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  3. The given figure illustrates a section through the human heart. W...

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  4. Chordae tendineae are found in

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  5. The problem of electrical discontinuity caused in the normal heart by ...

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  6. Match column I with column II and select the correct option from the c...

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  7. Blood enters the heart because muscles of the

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  8. During ventricular systole

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  9. If due to some injury the chordae tendineae of the tricuspid valve of ...

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  10. In humans, blood passes from the post caval to the diastolic right atr...

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  11. The figure given below shows three stages in the cardiac cycle Wh...

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  12. A red blood cell, entering the right side of the heart passes by or th...

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  13. What happens when the pacemaker becomes nonfunctional ?

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  14. In the given figure the durations of the events of the cardiac cycle a...

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  15. Which of the following statements (s) regarding the cardiac system is/...

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  16. In a cardiac output of 5250 mL per minute, with 75 heartbeats per minu...

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  17. Rate of heartbeat is determined by

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  18. Which one of the following is a matching pair ?

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  19. Heart sound which is longer is

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  20. X is the rhythmic contraction and relaxation in the aorta and its main...

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