Home
Class 12
BIOLOGY
[A] : The synaptic knob contains mitocho...

[A] : The synaptic knob contains mitochondria and synaptic vesicles rich in chemical trans- mitters.
[R]: Chemical transmitters are neurohor- mones. Their release is related to `Ca^(++)` in- flux.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ANIMAL KINGDOM -NONCHORDATES

    TRUEMAN BIOLOGY|Exercise MCQ|291 Videos
  • APPLICATION OF BIOTECHNOLOGY

    TRUEMAN BIOLOGY|Exercise Multiple Choice Questions|122 Videos

Similar Questions

Explore conceptually related problems

Axon endings release from ints synaptic vesicles , a neuro-transmitter substance known as

Assertion : The chemical stored in the synaptic vesicles are termed as neurotransmitters. Reason : Synaptic vesicles release these chemicals in the synaptic cleft.

Which option is correct for conduction of nerve impulse along chemical synapse? i. At synapse, the membranes of the pre and postsynaptic neurons are separated by a fluid-filled space called synaptic cleft ii. Chemicals called neurotransmitters are incolved in the transmission of impulses at these synapses iii. The axom terminals contain vesicles filled with these neurotransmitters iv. When an impulse arrives at the axon terminal, synaptic vesicles release their neurotransmitters in the synaptic cleft. v. The release neurotransmitters bind to their specific receptors, present on the pre-synaptic membrane. vi. Opens ion channels allowing the entry of ions which can generate a new potential in the postsynaptic neuron vii. The new potential developed is only excitatory

The given diagram shows axon terminal.Select the option that correctly matches the steps in transmission of impulses (list i-vii) with the labellings (A-C) in diagram. (i)Chemicals called neurotransmitters are released in the synaptic cleft through ion channels. (ii)When an impulse arrives at the axon terminal, it stimulates the movement of synaptic vesicles. (iii)Neurotransmitters are endocytosed into the neurons. (iv)The ions channels close with the binding of neurotransmitters to their specific receptors vesicles. (v)Synaptic vesicles move towards the membrane where they fuse with the plasma membrane. (vi)Neurotransmitters are released in the synaptic cleft. (vii)The released transmitters bind to their specific receptors on post-synaptic membrane

[A] : Synaptic vesicles fuse with membrane and release neurotransmitter molecules. [R]: Neurotransmitter attaches to receptor site and open sodium channels to allow so- dium to flow into post synaptic cell causing depolarisation.

The release of chemical messenger from synaptic vesucles is under the influence of which of these ion (s) ?

Which of the following statements regarding impulse transmission is incorrect ? I . Chemicals called neurotransmitters are involved in impulse transmission across the synapses. II. The membranes of the pre - synaptic and post - synaptic neuron are separated by an empty space called the synaptic cleft. III. The released neurotransmitters bind to the specific receptors present on the pre - synaptic membrane. IV. The new potential which develops is always excitatory.

TRUEMAN BIOLOGY-Animal Physiology -ASSERTION AND REASON
  1. [A] : Vitamin K is water soluble and must for fibrin production. [...

    Text Solution

    |

  2. [A] : The synaptic knob contains mitochondria and synaptic vesicles ri...

    Text Solution

    |

  3. [A] : Lymphocytes arise from bone marrow and present in the blood, ly...

    Text Solution

    |

  4. [A]: Dental formula is the number of teeth in upper jaws of one side a...

    Text Solution

    |

  5. [A] : Synaptic vesicles fuse with membrane and release neurotransmitt...

    Text Solution

    |

  6. [A] : Each myosin filament is composed of about 500 thread iike myosin...

    Text Solution

    |

  7. [A] : Retinene is a constituent of vitamin A (re- tinol). [R]: Vitam...

    Text Solution

    |

  8. [A] : Haversian canals are inter connecting canals that run usually lo...

    Text Solution

    |

  9. [A] : Cartilage (Protein matrix) and Bone (Cal- cium matrix) are rigi...

    Text Solution

    |

  10. Assertion : In the descending limb of loop of Henle , the urine is hyp...

    Text Solution

    |

  11. [A] : Nephritis is the inflammation of the lungs and muscles. [R]: ...

    Text Solution

    |

  12. [A] : The urinary bladder is capable of consid- erable expansion in v...

    Text Solution

    |

  13. [A] : Deamination occurs by transaminase enzyme in kidney. [R]: Rem...

    Text Solution

    |

  14. [A] : Hydrostatic pressure in blood forces wa- ter and other solutes ...

    Text Solution

    |

  15. [A] : Extracellular fluid serves as the sanitary drainage line of the...

    Text Solution

    |

  16. [A] : [A]: ECG is a record of electrical activity of the heart that sh...

    Text Solution

    |

  17. [A] : Regulation of the rate of breathing is brought about by the resp...

    Text Solution

    |

  18. [A] : Role of RBC' In CO2 transport Is primarily to form HCO3 - for c...

    Text Solution

    |

  19. [A] : SA node is contraction centre or Pace Maker. [R]: Nodal fibre...

    Text Solution

    |

  20. [A] : Acetylchoiine allows a nerve cell to com- municate chemically w...

    Text Solution

    |