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When a neuron is in resting state $i . e$ ., not conducting any impulse, the axonal membrane is

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Important Questions on Control and Co-ordination

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Stimulation of a muscle fiber by a motor neuron occurs at:

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Explain the plasma membrane of a nerve cell with respect to the maintenance of potential.

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Receptor sites for neurotransmitters are present on

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Assertion ( $A$ ): In myelinated nerve fibres, action potentials are conducted at a faster rate.

Reason ( $R$ ): The myelin present between nodes of Ranvier has concentrated $Na$ and $K$ voltage-gated channels.

EASY

Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Resting membrane potential of a neuron is approximately:

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Identify $A, B, C$ and $D$ in the following graph regarding nerve impulse transmission.

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Nissl bodies are mainly composed of

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Neurotransmitter released at the neuromuscular junction of a voluntary muscles is:

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Each neuron has a cell body, axon, and dendrites. The dendrites are the protoplasmic extensions of the nerve cell. The axodendritic type of chemical synapse is formed by the association between the axon terminal of the pre-synaptic neuron and the dendrites of a post-synaptic neuron. The action potential causes the fusion of the synaptic vesicle to release the neurotransmitters for neurotransmission. Select the correct option from the following.

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

The correct pathway of conduction of impulses through a neuron is :

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Concentration of

N a^{+}

ions outside a nerve cell is

~ 100

times more than inside. The concentration of

K^{+}

ions is more inside the cells. The levels of

N a^{+}

ions and

K^{+}

ions are maintained by:

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

When 'A' stands for Axon, 'D' for Dendrites, 'S' for Synapse and 'B' for Cell body, a typical sequence of structures between a receptor and an efferent is

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Which one of the following ion pairs is involved in nerve impulses?

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

The transport of which neutrotransmitter is interfered by cocaine?

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Which of the following is secreted at the ends of an axon?

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Biology>Human Physiology>Control and Co-ordination>Excitation, Conduction and Transmission of Nerve Impulses

Select the incorrect statement regarding synapses: