Home
Class 12
BIOLOGY
In which the following has the ability t...

In which the following has the ability to generate action potential without any external stimuli ?

A

Sino- atrial node (SAN)

B

Atrio-ventricular node (AVN)

C

Purkinje fibres

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • BODY FLUIDS AND CIRCULATION

    PHYSICS WALLAH|Exercise NEET Past 10 Years Questions|28 Videos

  • BODY FLUIDS AND CIRCULATION

    PHYSICS WALLAH|Exercise NEET Past 10 Years Questions|28 Videos

  • BIOTECHNOLOGY: PRINCIPLES AND PROCESSES

    PHYSICS WALLAH|Exercise NEET PAST 10 YEARS QUESTIONS |47 Videos

  • BREATHING AND EXCHANGE OF GASES

    PHYSICS WALLAH|Exercise NEET Past 10 Year questions |26 Videos

Similar Questions

Explore conceptually related problems

Read the following statements carefully (i) In fishes, the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body part from where deoxygenated blood is returned to the heart (ii) The openings of the right and the left ventricles into pulmonary artery and aorta respectively are provided with the mitral valves (iii) The nodal musculature has the ability to generate action potential without any external stimuli, i,e., it is autoexcitable (iv) The T-wave of ECG represent depolarisation of the ventricles. Which of the above two statements are incorrect ?

Assertion: The nodal musculature has the ability to generate action potentials without any external stimuli, i.e., it is auto-excitable. Reason: The number of action potentials that could be generated in a minute very at different parts of the nodal system.

Read the following statements (i) The nodal musculature of the heart has the ability to generate action potentials without any external stimuli. (ii) The AV node is located in the right ventricle close to the AV septum (iii) The stroke volume is the amount of blood pumped out by each ventricle per minute. Which of these are correct ?

Read the following statements about the internal structure of the human heart. I. Humans have a an auto - excitable , chambered , muscular and myogenic heat. II. The heart is mesodermal in origin and is present symmetrically between two lungs in the thoracic cavity. III. The opening between the right atrium and left ventricle is guarded by a tricuspid valve. IV. Only th sino - atrial node of the heart has hte ability to generate action potentials without any external stimuli. How many statement/s is/ are incorrect from the above ?

Read the following statements and select the correct ones (i) Nodal tissue is specialised cardiac musculature in human heart which has the ability to generate action potential due to an external stimuli (ii) Position of SAN - right corner of right atrium (iii) Position of AVN - right corner of ventricle (iv) AV bundle continues from AVN (v) Purkinje fibres are modified cardiac muscle fibres that originate from the atrioventricular node and spread into the two ventricles.

PHYSICS WALLAH-BODY FLUIDS AND CIRCULATION-Level-2
  1. ECG depicts the depolarisation and repolarisation process during the c...

    Text Solution

    |

  2. 'X'' is a fibrous tissue of the membranous septum of the heart just ab...

    Text Solution

    |

  3. When there is a sudden loss of blood from the body the organ which sup...

    Text Solution

    |

  4. The renal portal system of vertebrates is significant for

    Text Solution

    |

  5. The wall of Human heart is thick due to presence of :-

    Text Solution

    |

  6. What are the functions of double circulation ?

    Text Solution

    |

  7. Mitral valve in mammalian heart guards the opening between

    Text Solution

    |

  8. Open circulatory system is present in : (A) Arthropods (B)...

    Text Solution

    |

  9. Prothrombin overset (a)to Thrombin Fibrinogen overset(b)to Fibrin ...

    Text Solution

    |

  10. The rate of the heart and their conduction is represented in the pathw...

    Text Solution

    |

  11. The first heart sound is associated with :

    Text Solution

    |

  12. Match the Colum-I with Column -II . {:(,"Column-I",,"Column-II"),((A),...

    Text Solution

    |

  13. In which the following can increase the rate of heart beat ? (A) Sym...

    Text Solution

    |

  14. If you suspect major deficiency of antibodies in a person, to which o...

    Text Solution

    |

  15. In which the following has the ability to generate action potential wi...

    Text Solution

    |

  16. Which information is incorrect about cardiac output ?

    Text Solution

    |

  17. Find out the incorrect answer from the following ?

    Text Solution

    |

  18. Identify the correct sequence of events in a cardiac cycle

    Text Solution

    |

  19. Select the correct option w.r.t E.C.G ?

    Text Solution

    |

  20. Which among the following is correct during each cardiac cycle

    Text Solution

    |