Home
Class 11
BIOLOGY
Read the given statements and select the...

Read the given statements and select the correct option.
(i)Synaptic cleft of neurons secreates adrenaline.
(ii)Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon.
(iii)Non-myelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath.
(iv)Spinal and cranial nerves are made of non-myelinated nerve fibres.

A

1 and 2 are correct but 3 and 4 are incorrect

B

1, 2 and 3 are correct but 4 is incorrect

C

3 and 4 are correct but 2 and 1 are incorrect

D

2 and 3 are correct but 1 and 4 are incorrect

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NEURAL CONTROL AND COORDINATION

    MODERN PUBLICATION|Exercise COMPETITION FILE (OBJECTIVE TYPE QUESTIONS)(B. CBSE - PMT (MAIN EXAMINATION)QUESTIONS: )|6 Videos

  • NEURAL CONTROL AND COORDINATION

    MODERN PUBLICATION|Exercise COMPETITION FILE (OBJECTIVE TYPE QUESTIONS)(C. MATCHING TYPE QUESTIONS: )|4 Videos

  • NEURAL CONTROL AND COORDINATION

    MODERN PUBLICATION|Exercise REVISION EXERCISES (Long Answer Questions)|3 Videos

  • MORPHOLOGY OF FLOWERING PLANTS

    MODERN PUBLICATION|Exercise CASE BASED SHORT ANSWER TYPE QUESTIONS|2 Videos

  • PHOTOSYNTHESIS IN HIGHER PLANTS

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|9 Videos

Similar Questions

Explore conceptually related problems

Which of the following statemetn are correct and incorret 1. Synaptic cleft of neurons secrate adrenaline 2. Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon 3. Non- myrlineated nerve fibre is emclosed by a schwann cell that from a myelin sheath. 4. Spinal cord and cranial nerve are made of non-myelinated nerve fibres of the four statemets

Assertion : Myelinated nerve fibre are enveloped with Schwan cells, which form a myelin sheath around the axon Reason : Unmyelinated nerve fibre is not enclosed by a Schwan cell and hence does not form a myelin sheath around the axon.

Schwann cells begin to form myelin sheaths around axons :

Nodes of Ranvier occur in non-myelinated nerve fibres.

Cells which envelop nerve fibres and form myelin sheath around the axon are

Myelin sheath of nerve fibres is produced by

Which cells of PNS secrete myelin sheath around the nerves?

Which of the following has non-myelinated nerve fibre

A neuron is a microscopic structure composed of three major parts, namely, cell body, dendrites and axon. There are two types of axons, namely, myelinated, and nonmyelinated. Which of the following is true for nerve ? i. The myelinated nerve fibres are enveloped with Schwann cells ii. Schwann cells form a myelin sheath around the axom iii. The gaps between two adjacent myelin sheaths are called nodes of Ranvier. iv.Myelinated nerve fibres are found in autonomous and the somatic neural systems v. Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon. vi. Unmyelinated nerve fibre is commonly found in spinal and cranial nerves

MODERN PUBLICATION-NEURAL CONTROL AND COORDINATION-COMPETITION FILE (OBJECTIVE TYPE QUESTIONS)(A. MULTIPLE CHOICE QUESTIONS)
  1. The tympanic cavity in frog communicates with pharynx through:

    Text Solution

    |

  2. The electrical potential diference between outside and inside of a ner...

    Text Solution

    |

  3. Read the given statements and select the correct option. (i)Synaptic...

    Text Solution

    |

  4. The order of the three layers of cells in the retina of human eye from...

    Text Solution

    |

  5. The tract of nerve fibres which connects the cerebral hemisphere is

    Text Solution

    |

  6. The human hind brain comparises three parts, one of which is

    Text Solution

    |

  7. Which part of the human ear plays no role in hearing as such but is ot...

    Text Solution

    |

  8. A person entering an empty room suddenly fins a snake right in front o...

    Text Solution

    |

  9. Which of the following is correctly matched for the given figure?

    Text Solution

    |

  10. The release of chemical messenger from synaptic vesucles is under the ...

    Text Solution

    |

  11. Parasympathetic ganglia are present in

    Text Solution

    |

  12. Which of the following is not a reflex action

    Text Solution

    |

  13. Nerve gas affects neuromuscular activity by

    Text Solution

    |

  14. An investigator places an isolated neuron in a calcium-free medium, gi...

    Text Solution

    |

  15. Dark adaptation in human eye includes :

    Text Solution

    |

  16. The optic lobes in humans are represented by the corpora

    Text Solution

    |

  17. Integration of the visual, tactile and auditory inputs occurs in the ...

    Text Solution

    |

  18. Parts A,B,C and D of the human eys are shown in the diagram. Select t...

    Text Solution

    |

  19. A diagram showing axon terminal and synpase is given. Identify correct...

    Text Solution

    |

  20. One of the following ions are required for nerve impulse transmission ...

    Text Solution

    |