Complete the statement by selecting the appropriate match among the following.
Column-$I$ Column-$II$
$(a)$ Resting potential $(i)$ Chemicals involved in the transmission of impulses at synapses.
$(b)$ Nerve impulse $(ii)$ Gap between the presynaptic and postsynaptic neurons.
$(c)$ Synaptic cleft $(iii)$ Electrical potential difference across the resting neural membrane.
$(d)$ Neurotransmitters $(iv)$ An electrical wave-like response of a neuron to a stimulation.

  • A
    $a-iii, b-iv, c-ii, d-i$
  • B
    $a-i, b-ii, c-iii, d-iv$
  • C
    $a-iv, b-iii, c-i, d-ii$
  • D
    $a-ii, b-i, c-iv, d-iii$

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$(c)$ Mechanism through which a sound produces a nerve impulse in the inner ear.

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Which of the following cranial nerves are classified as mixed nerves?

Explain the following processes:
$(a)$ Polarisation of the membrane of a nerve fibre
$(b)$ Depolarisation of the membrane of a nerve fibre
$(c)$ Conduction of a nerve impulse along a nerve fibre
$(d)$ Transmission of a nerve impulse across a chemical synapse

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