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In a synapse, the membranes of the transmitting neuron and the receiving neuron may or may not be divided by a fluid-filled gap known as the synaptic cleft. This gap contains neurotransmitters that facilitate impulse transmission. Which of the following are components of this process?

1. Receptors
2. Synaptic cleft
3. Synaptic vesicles
4. All of the above

Correct answer: All of the above

Solution

The question describes the components of a synapse, including receptors, synaptic cleft, and synaptic vesicles, all of which are involved in impulse transmission. Therefore, the correct answer is 'All'.

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