Home
Class 11
BIOLOGY
Which of the following statements are co...

Which of the following statements are correct and incorrect ?
1. Non-myelinated nerve fibre is enclosed by a schwann cell that does not form a myelin sheath.
2. Synaptic cleft of neurons secrete adrenaline.
3. Spinal cord and cranial nerves are made of non-myelinated nerve fibres..
4. Myelinated nerve fibres are enveloped with schwann cells, which form a myelinated sheath around the axon.

A

1, 2, 3 are correct but 4 is incorrect

B

1, 4 are correct while 2, 3 are incorrect

C

2, 3 are correct while 1, 4 are incorrect

D

1, 3 are correct but 2, 4 are incorrect

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NEURAL CONTROL AND CO-ORDINATION

    SANTRA PUBLICATION|Exercise VERY SHORT ANSWER TYPE QUESTIONS|42 Videos

  • NEURAL CONTROL AND CO-ORDINATION

    SANTRA PUBLICATION|Exercise SHORT ANSWER TYPE QUESTIONS|28 Videos

  • MOVEMENT AND LOCOMOTION

    SANTRA PUBLICATION|Exercise NCERT Questions|14 Videos

  • PHOTOSYNTHESIS

    SANTRA PUBLICATION|Exercise NCERT QUESTIONS|9 Videos

Similar Questions

Explore conceptually related problems

Which of the following has non-myelinated nerve fibre

Which one of the following human cells does not contain mitochondria? 1. Nerve cell 2. Red blood cell 3. Liver cell 4. White blood cells

At regular interval, the nerve fibre possesses constriction of myelin sheath known as ________ .

Myelin sheath is not found around nerve fibres of

Myelin sheath is produced by or Myelin of the nerve fibres of the central nervous system is produced and maintained by

Myelin sheath is produced by or Mylin of the nerve fibres of the central nervous system is produced and maintained by

Distinguish between : (a) afferent neurons and efferent neurons (b) impulse conduction in an myelinated nerve fibre and unmyelinated nerve fibre (c ) aqueous humour and vitreous humor (d) blind spot and yellow spot (f) cranial nerves and spinal nerves .

Draw a neat diagram of a neurone and label the following parts: Dendron,Node of Ranvier, Myelin sheath, Schwann cell.

Draw a neat diagram of an ideal neuron and label the following parts : (a) Axon (b) Dendron (c) Myelin Sheath (d) Schwann Cell

SANTRA PUBLICATION-NEURAL CONTROL AND CO-ORDINATION-NCERT QUESTIONS
  1. Which of the following statements are correct and incorrect ? 1. Non...

    Text Solution

    |

  2. Briefly describe the structure of the following : Brain

    Text Solution

    |

  3. Briefly describe the structure of the following : Eye

    Text Solution

    |

  4. Briefly describe the structure of the following : Ear

    Text Solution

    |

  5. Compare the following : Central neural system (CNS) and Peripheral n...

    Text Solution

    |

  6. Compare the following : Resting potential and action potential

    Text Solution

    |

  7. Compare the following : Choroid and retina.

    Text Solution

    |

  8. Explain the following process : Polarisation of the membrane of a ne...

    Text Solution

    |

  9. Explain the following process : Depolarisation of the membrane of a ...

    Text Solution

    |

  10. Explain the following process : Conduction of a nerve impulse alsong...

    Text Solution

    |

  11. Explain the following process : Transmission of a nerve impulse acro...

    Text Solution

    |

  12. Draw labelled diagrams of the following Neurone

    Text Solution

    |

  13. Draw labelled diagrams of the following Brain

    Text Solution

    |

  14. Draw labelled diagrams of the following Eye

    Text Solution

    |

  15. Draw labelled diagrams of the following Ear

    Text Solution

    |

  16. Write short notes on the following : Neural coordination

    Text Solution

    |

  17. Write short notes on the following : Forebrain

    Text Solution

    |

  18. Write short notes on the following : Midbrain

    Text Solution

    |

  19. Write short notes on the following : Hindbrain

    Text Solution

    |

  20. Write short notes on the following : Retina

    Text Solution

    |

  21. Write short notes on the following : Ear ossicles

    Text Solution

    |