Home
Class 11
BIOLOGY
Blood enters the heart because muscles o...

Blood enters the heart because muscles of the

A

atrium contracts

B

atrium relaxes

C

ventricles relaxes

D

ventricle contracts

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • BIOMOLECULES

    NCERT FINGERTIPS|Exercise Biomolecules|137 Videos
  • BREATHING AND EXCHANGE OF GASES

    NCERT FINGERTIPS|Exercise Breathing And Exchange Of Gases|140 Videos

Similar Questions

Explore conceptually related problems

Muscles of heart are

Heart muscles are

Heart muscles are

Name the muscles of heart.

Name the muscle of heart.

The blood vessels that carry blood from the heart to the various parts of the body are called :

NCERT FINGERTIPS-BODY FLUIDS AND CIRCULATION-Body Fluids And Circulation
  1. The problem of electrical discontinuity caused in the normal heart by ...

    Text Solution

    |

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

    Text Solution

    |

  3. Blood enters the heart because muscles of the

    Text Solution

    |

  4. During ventricular systole

    Text Solution

    |

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

    Text Solution

    |

  6. In humans, blood passes from the post caval to the diastomic right atr...

    Text Solution

    |

  7. The figure given below three stages in the cardiac cycle Which of...

    Text Solution

    |

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

    Text Solution

    |

  9. What happens when the pacemaker becomes nonfunctional ?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  13. Rate of heartbeat is determined by

    Text Solution

    |

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

    Text Solution

    |

  15. Heart sound which is longer is

    Text Solution

    |

  16. X" is the rhythmic contraction and relaxation in the aorta and its mai...

    Text Solution

    |

  17. Which of the following is the diagrammatic representation of standard ...

    Text Solution

    |

  18. In a standard ECG which one of the following alphabets is the correct ...

    Text Solution

    |

  19. Examine the diagrammatic representation of standard ECG. Select an opt...

    Text Solution

    |

  20. Which of the following statements is correct ?

    Text Solution

    |