Where do two neurons connect?

Study for the IGCSE Biology Exam on Coordination and Response. Access multiple-choice questions with hints and explanations. Enhance your understanding and get exam-ready!

Multiple Choice

Where do two neurons connect?

Explanation:
The main concept is how neurons communicate at a junction called a synapse. A synapse is the specialized gap where the axon terminal of one neuron meets the dendrite or cell body of the next neuron. It’s not a direct physical connection like a fuse between cells; instead, communication crosses the tiny gap by neurotransmitters released from the presynaptic terminal and picked up by receptors on the postsynaptic membrane. If enough signal arrives, the next neuron fires an impulse. The dendrite is part of the receiving neuron, but the actual connecting point is the synapse. The Node of Ranvier is a gap in the myelin sheath along an axon and helps speed signals, while the axon terminal is the end of the sending neuron that releases neurotransmitters.

The main concept is how neurons communicate at a junction called a synapse. A synapse is the specialized gap where the axon terminal of one neuron meets the dendrite or cell body of the next neuron. It’s not a direct physical connection like a fuse between cells; instead, communication crosses the tiny gap by neurotransmitters released from the presynaptic terminal and picked up by receptors on the postsynaptic membrane. If enough signal arrives, the next neuron fires an impulse. The dendrite is part of the receiving neuron, but the actual connecting point is the synapse. The Node of Ranvier is a gap in the myelin sheath along an axon and helps speed signals, while the axon terminal is the end of the sending neuron that releases neurotransmitters.

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