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The axon terminals of nerves contains...

The axon terminals of nerves contains

A

Vesicles filled with neurotransmitters

B

Vesicles filled with calcium ions

C

Nissl's granules

D

Vesicles filled with neurohormones

Text Solution

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The correct Answer is:
A
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If you could selectively neutralise the active transport mechanisms at the axon terminals of a neuron, which of the following processes would you most significantly impact?

How many statements are correct for resting state of axon ? i. The axoplasm inside the axon contains high concentration of K^(+) and negatively charged proteins and low concentration of Na^(+) ii. In contract, the fluid outside the axon contains a low concentration of K^(+) , is high concentration of Na^(+) and thus form a concentration gradient. iii. The outer surface of the axonal membrane possesses a positive charge while its inner surface becomes negatively charged. iv. The electrical potential difference across the resting plasma membrane is called an the resting potential. v. Resting stage is depolarised state vi. Resting potential is positive potential

Knowledge Check

  • 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

    A
    i, ii, iii, iv, v and viii
    B
    i, ii, iii, iv and vi
    C
    i, iv, v, vi and vii
    D
    i, ii, iii, iv, v, vi and viii

  • Suppose the terminal ends of axon are in contact with dendrites of four adjacent neurons , the nerve impulse of the axon will

    A
    Travel in all the four neurons
    B
    Get distributed in all the four neurons resulting in a weak impulse
    C
    Travel only in one neuron which is in closest contact and with the same intensity
    D
    Travel in none of the neurons because the impulse travels from dendrites of one neuron into the axon of another neuron

  • The axoplasm inside the axon contains high concentration of .......and ............:-

    A
    `K^(+) and Na^(+)`
    B
    `K^(+)` and Negatively charged proteins
    C
    `Na^(+) and Cl^(-)`
    D
    Both A and C

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