When the nerve impulse reaches the dendrites at the end of the axon, chemical messengers called neurotransmitters are released.
These chemicals diffuse across the synapse (the gap between the two neurons).
The chemicals bind with receptor molecules on the membrane of the second neuron.
What are the chemicals that travel between neurons quizlet?
When a nerve impulse reaches the axon terminal, chemical messengers called neurotransmitter cross the synapse and bind to receptor sites on the receiving neuron’s dendrite.
What are chemical messages released at synapses called?
At a chemical synapse, one neuron releases neurotransmitter molecules into a small space (the synaptic cleft) that is adjacent to another neuron. The neurotransmitters are contained within small sacs called synaptic vesicles, and are released into the synaptic cleft by exocytosis.
What are the components of a chemical synapse?
The structure of a typical chemical synapse comes in three parts:
- The pre-synaptic terminal is usually on the axon.
- The synaptic membrane of the post-synaptic cell is usually on the dendrite of the next neuron.
- The synaptic cleft is the bit in the middle of the two membranes.
What is a chemical synapse?
Chemical synapses are specialized junctions through which cells of the nervous system signal to one another and to non-neuronal cells such as muscles or glands. A chemical synapse between a motor neuron and a muscle cell is called a neuromuscular junction.
How do messages travel from one neuron to another quizlet?
Messages are sent from the axon terminals of one neuron to the dendrites of other neurons. In order for a message to be sent from one neuron to another, it must cross the synapse. Messages are received by the dendrites and travel through the cell body and the axon to the axon terminals.