Home
Class 11
BIOLOGY
Which wave shape occurs from the start o...

Which wave shape occurs from the start of depolarisation of the atria to the beginning of ventricular depolarisation ?

A

P wave

B

ST segment

C

QRS complex

D

PQ interval

Text Solution

Verified by Experts

The correct Answer is:
D
PQ interval
Promotional Banner

Topper's Solved these Questions

  • BODY FLUIDS AND CIRCULATION

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED ( Fill in the Blanks)|76 Videos

  • BODY FLUIDS AND CIRCULATION

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED ( Answers the following Questions)|22 Videos

  • BODY FLUIDS AND CIRCULATION

    FULL MARKS|Exercise ENTRANCE EXAMINATION QUESTIONS SOLVED|34 Videos

  • BIOMOLECULES

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (Higher Order Thinking Skills)|16 Videos

  • CELL CYCLE

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (Higher Order Thinking Skills)|12 Videos

Similar Questions

Explore conceptually related problems

A table with smooth horizontal surface is placed in a cabin which moves in a circle of a large radius R Figure. A smooth pulley of small radius is fastened to the table. Two masses m and 2m placed on te tableare connected through a string going over the pulley. Initially the masses are held by a personwith the strings aslong teh outward radius and then the system is released from rest (with respect to the cabin). Find the magnitude of the initial acceleration of the mases as seen from the cabin and the tension in the starting.

ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented.

A string of linear mass density 0.5 g cm^-1 and a total length 30 cm is tied to a fixed wall at one end and to a frictionless ring at the other end. The ring can move on a vertical rod. A wave pulse is produced on the string which moves towards the ring at a speed of 20 cm s^-1 . The pulse is symmetric about its maximum which is located at a distance of 20 cm from the end joined to the ring. (a) Assuming that the wave is reflected from the ends without loss of energy, find the time taken by the string to regain its shape. (b) The shape of the string changes periodically with time. Find this time period. (c) What is the tension in the string ?

Through which made of propagation the radio waves can be sent from one place to another.

A ball is dropped from a height of 19.6 m above the ground. It rebounds from the ground and raises itself up to the same height. Take the starting point as the origin and vertically downward as the positive X-axis. Draw approximate plots of x versus t, v versus t and a versus t. Neglect the small interval during which the ball was in contact with the ground.

Sound waves from a loudspeaker spread nearly uniformly in all directions if the wavelength of the sound is much larger than the diameter of the loudspeaker. (a) Calculate the frequency for which the wavelength of sound in air is ten times the diameter of the speaker if the diameter is 20 cm. (b) Sound is essentially transmitted in the forward direction if the wavelength is much shorter than the diameter of the speaker. Calculate the frequency at which the wavelength of the sound is one tenth of the diameter of the speaker described above. Take the speed of sound to be 340 m s^-1 .

Fill up the blanks in the following paragraph by selecting the correct option A. overset("i")("___") methods work on the principle of avoiding chances of ovum and sperms meeting B. overset("ii")("___") is one such method in which the couples avoid coitus from day 10 to 17 of the menstrual cycle C. overset("iii")("___") is another method in which the male partner withdraws his penis from the vagina just before ejaculation so as to avoid insemination D. overset("iv")("___") method is based on the fact that ovulation and therefore the cycle do not occur during the period of intense loctation following parturition.

Ventricular depolarisation is represented by ...........in a ECG.

FULL MARKS-BODY FLUIDS AND CIRCULATION-ADDITIONAL QUESTIONS SOLVED (Multiple Choice Questions)
  1. ............. have distinctly dilobed nucleus and the lobes are joined...

    Text Solution

    |

  2. What is the percentage of lymphocytes among WBCs ?

    Text Solution

    |

  3. The macrophages in the sinusoids of the liver are called .........

    Text Solution

    |

  4. A' blood group has ..........antigen and .......... Antibody.

    Text Solution

    |

  5. Erythroblastosis foetalis is a condition of incompatibility related to...

    Text Solution

    |

  6. The conversion of prothrombin into thrombin occurs in the presence of ...

    Text Solution

    |

  7. .............. Is the exceptional artery which carries deoxygenated bl...

    Text Solution

    |

  8. Pulmonary veins carry ........ Blood from lungs to ............

    Text Solution

    |

  9. The blood vessels that supply blood to the cardiac muscles with all nu...

    Text Solution

    |

  10. ..........guards the opening between the left atrium and left ventricl...

    Text Solution

    |

  11. The heart normally beats ............ Times per minutes in a human adu...

    Text Solution

    |

  12. Which wave shape occurs from the start of depolarisation of the atria ...

    Text Solution

    |

  13. In systemic circulation , blood from the .........ventricle is carried...

    Text Solution

    |

  14. Which hormone increases the heart beat?

    Text Solution

    |

  15. Thrombus in a coronary artery result in ...........

    Text Solution

    |

  16. Cerebral infarction is called. ...........

    Text Solution

    |

  17. The failure of the heart to pump out the normal stroke volume is a con...

    Text Solution

    |

  18. In which condition the heart muscles do not get oxygen supply?

    Text Solution

    |

  19. Which of the folloiwng is the autoimmune disease that demage the heart...

    Text Solution

    |

  20. The life saving procedure, CPR was first used by ............

    Text Solution

    |