A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-C.
A- Receptor, C- Synaptic vesicles
B- Synaptic connection, C- K+
A- Neurotansmitter, B- Synaptic cleft
C- Neurotransmitter, B- Ca++
A
A- Receptor, C- Synaptic vesicles
B
B- Synaptic connection, C- K+
C
A- Neurotansmitter, B- Synaptic cleft
D
C- Neurotransmitter, B- Ca++
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Solution
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The synaptic vesicles (represented by C) are present inside the axon terminals and they contain the neurotransmitters. They get attached to the pre-synaptic membrane and release the neurotransmitter in the synaptic cleft (represented by B) which gets attached to the receptor (represented by A) present on post-synaptic membrane. Thus, the correct solution is option A.
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Q1
A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-C.
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Q2
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?
I. Which alphabet indicate the location of the receptor molecules ?
II. Which alphabet points to a synaptic vesicles ?
III. Which alphabet points to neurotransmitter?
IV. Which alphabet points to synaptic cleft ?
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Q5
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