Synaptic Transmission

Q.

Which one of the following is the correct sequence of events that follows in a Synaptic Transmission of Nerve impulse _____.

1. The membrane becomes depolarized

2. Voltage Calcium channels open

3. Release of Synaptic Vesicles

4. Diffusion of neurotransmitter across the synaptic cleft, binding to receptor proteins

on the postsynaptic membrane.

1. 2, 1, 4, 3

2. 3, 2, 4, 1

3. 1, 2, 3, 4

4. 4, 1, 3, 2

Q. Explain the transmission of a nerve impulse across a chemical synapse.

Q. During synaptic transmission of nerve impulse, a neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q

1. P - acetylcholine, Q - $C{a}^{2+}$
2. P - acetylcholine, Q - $N{a}^{+}$
3. P - GABA, Q - $N{a}^{+}$
4. P - cholinesterase, Q - $C{a}^{2+}$

Q.

Identify the process in the image _____.

1. Electrical Nerve Impulse Transmission

2. Synaptic Nerve Impulse Transmission

3. Biological Nerve Impulse Transmission

4. Mechanical Nerve Impulse Transmission

Q. Transmission of nerve impulses through nerve fibres are unidirectional because

1. nerve fibres are insulated by a medullary sheath
2. sodium pump starts operating only at the cyton and then continues into the nerve fibre
   
3. neurotransmitters are released by dendrites and not by axon endings
   
4. neurotransmitters are released by the axon endings and not by the dendrites

Q.

Give a brief account of:

(a) Mechanism of synaptic transmission

(b) Mechanism of vision

(c) Mechanism of hearing

Q.

Give abrief account of:

(a)Mechanism of synaptic transmission

(b)Mechanism of vision

(c) Mechanism of hearing