Complete the statement by choosing 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 pre synaptic and post synaptic 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.

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Solution

Resting potential- electrical potential difference across the resting neural membrane:

Resting potential is the difference in electric charges across the axonal membrane where the axoplasm has a negative charge and in the extracellular fluid there is a positive charge.
Nerve impulse- an electrical wave like response of a neuron to a stimulation:

Nerve impulse is the momentary change in polarity of the membrane of nerve fibre in response to a stimulation.

Synaptic cleft- gap between the pre synaptic and postsynaptic neurons:

Synaptic cleft is a narrow gap that separates the presynaptic and postsynaptic neuron in a synapse.

Neurotransmitters- chemicals involved in the transmission of impulses at synapses. :

Neurotransmitters are chemicals used to transmit nerve impulse across the chemical synapse between two neurons.
Summary:

Column I Column II

(a) Resting potential (iii) Electrical potential difference across the resting neural membrane.

(b) Nerve impulse (iv) An electrical wave like response of a neuron to a stimulation.

(c) Synaptic cleft (ii) Gap between the pre synaptic and postsynaptic neurons.

(d)Neurotransmitters (i) chemicals involved in the transmission of impulses at synapses.

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Complete the statement by chossing appropriate match among the following.

$\begin{matrix} C o l u m n I & C o l u m n I I A . R e s t i n g p o t e n t i a l & 1. C h e m i c a l s i n v o l v e d i n t h e t r a n s m i s s i o n o f i m p u l s e s a t s y n a p s e s . B . S y n a p t i c c l e f t & 2. G a p b e t w e e n t h e p r e s y n a p t i c a n d p o s t s y n a p t i c n e u r o n s . C . S y n a p t i c c l e f t & 3. E l e c t r i c a l p o t e n t i a l d i f f e r e n c e a c r o s s t h e r e s t i n g n e u r a l m e m b r a n e . D . N e u r o t r a n s m i t t e r s & 4. A n e l e c t r i c a l w a v e l i k e r e s p o n s e o f a n e u r o n t o a s t i m u l a t i o n . \end{matrix}$

Q. A list of events occurring in the transmission of nerve impulse across the synapse is given below in a random order.
(i) Opening of specific ion channels allows the entry of ions, a new action potential is generated in the post-synaptic neuron.
(ii) Neurotransmitter binds to the receptor on post synaptic membrane.
(iii) Synaptic vesicle fuses with pre-synaptic membrane, neurotransmitter release into synaptic cleft.
(iv) Depolarisation of pre-synaptic membrane.
(v) Arrival of action potential at axon terminal.
Which of the following options represents these events in a correct order?

Q. Do you know how the pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to the post-synaptic neuron?

Q. Assertion: Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.
Reason: Transmission across a synapse usually requires neurotransmitters because there is small space i.e. synaptic cleft, that separates one neuron from another.

Q. Which of the following statements is/are incorrect about the electrical synapse?
(i) At electrical synapses, the membranes of pre and post synaptic neurons are in very close proximity.
(ii) Electrical current can flow directly from one neuron into the other across the synapses.
(iii) Transmission of an impulse across electrical synapses is very similar to impulse conduction along single axon.
(iv) Electrical synapses pass electrical signal between cells with the use of Ach.
(v) Electrical synapses are fast.
(vi) Electrical synapses are rare in our system.

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Column I	Column II
(a) Resting potential	(iii) Electrical potential difference across the resting neural membrane.
(b) Nerve impulse	(iv) An electrical wave like response of a neuron to a stimulation.
(c) Synaptic cleft	(ii) Gap between the pre synaptic and postsynaptic neurons.
(d)Neurotransmitters	(i) chemicals involved in the transmission of impulses at synapses.