Question

In the following diagram showing axon, terminal and synapse, the labels a,b,c,d and e respectively represent

• A. Axon terminal, Synaptic cleft, Synaptic vesicles, Neurotransmitters, and Receptors
• B. Axon terminal, Synaptic vesicles, Synaptic cleft, Receptors, and Neurotransmitters
• C. Synaptic cleft, Synaptic vesicles, Axon terminal, Neurotransmitters and Receptors
• D. Synaptic cleft, Axon terminal, Synaptic vesicles, Neurotransmitters and Receptors
• E. Synaptic vesicles, Axon terminal, Synaptic cleft, Receptors and Neurotransmitters

Answer 1

The correct option is B Axon terminal, Synaptic vesicles, Synaptic cleft, Receptors, and Neurotransmitters

• Axon terminals are enlarged, club-shaped endings by which axons make synaptic contacts with other nerve cells or with effector cells.
• The synaptic vesicle is a small secretory vesicle that contains a neurotransmitter, found inside an axon near the presynaptic membrane, and releases its contents into the synapse.
• The synaptic cleft is the space between neurons at a nerve synapse across which a nerve impulse is transmitted by a neurotransmitter.
• A neurotransmitter receptor (also known as a neuroreceptor) is a membrane receptor protein that is activated by a neurotransmitter.
• Neurotransmitters are endogenous chemicals, that transmit signals across a synapse from one neuron to another neuron. Neurotransmitters are stored in synaptic vesicles in the axon terminal located at the presynaptic side of a synapse.

So, the correct answer is option B.