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What are neurontransmitters?
a chemical that transmits a nervous systems signal across a synapse.
On which direction does an impulse go across a synapse?
An impulse travels in one direction across a synapse, from the presynaptic neuron to the postsynaptic neuron. This ensures that the signal transmission in the nervous system is unidirectional.
Neural transmission across a mammalian synaptic gap is accomplished by?
impulses causing the release of a chemical signal and its diffusion across the synapse.
State why there is a brief delay in the transmission of an impulse across the synapse?
The impulse must go from one neuron to the next. To do this, it must change from an electrical to a chemical signal, and back to an electrical signal when it reaches the next neuron. Electrical signals are impossibly fast, but neurotransmitters cannot cross a synapse that fast. So, the impulse is at its slowest point when it crosses the synapse.
What is junction between two neurons?
The junction between two neurons is called a synapse. At the synapse, the electrical signal in the first neuron (presynaptic neuron) is converted into a chemical signal in the form of neurotransmitters, which then travel across the synapse and are received by the second neuron (postsynaptic neuron) to continue the signal transmission.
What is the term for the cell that receives a signal at a synapse?
The cell receiving the signal at the synapse is called the postsynaptic neuron.
What is a synapse in a simple reflex action?
A synapse in a simple reflex action is a junction between two neurons where signals are transmitted. In a reflex action, when a stimulus triggers a sensory neuron, it sends a signal across a synapse to a motor neuron, which then causes a rapid response from a muscle or gland.
How does a signal cross from the axon of the neuron to the receiving cell?
When the electrical signal reaches the end of an axon, neurotransmitters are released. They travel across the synapse. Once they reach the receiving cell, they create a new electrical signal.
What is the small space between one neuron and the next is called?
A synapse, chemical signals called neurotransmitters cross these gaps, carrying on the signal.
What is the distance across a nerve synapse?
The distance across a nerve synapse is 20 nanometres or 2x10-8 metres
Neurons transmit signals acrossed a?
Neurons transmit signals across a small gap called a synapse by releasing neurotransmitters from the axon terminal. These neurotransmitters bind to receptors on the membrane of the receiving neuron, allowing the signal to continue along the neural pathway. This process is crucial for communication within the nervous system.
What is the opening across which one neuron communicates with another neuron known as?
The opening across which one neuron communicates with another neuron is called a synapse. At the synapse, chemical signals called neurotransmitters are released from the presynaptic neuron, which then bind to receptors on the postsynaptic neuron to transmit the signal.
