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A motor unit consists of a motor neuron and all the muscle fibers it innervates. When the motor neuron fires, all the muscle fibers in the motor unit contract simultaneously. This coordinated activation allows for precise control of muscle force and movement.
The refractory period is the time after a neuron fires when it cannot fire again, while the absolute refractory period is the specific part of the refractory period when the neuron is completely unable to fire, regardless of the stimulus.
When muscles and nerves group together, it is called a motor unit. A motor unit consists of a single motor neuron and all the muscle fibers it innervates. When the motor neuron fires, all the muscle fibers in the motor unit contract together.
The synapse consists of the two neurons, one of which is sending information to the other. The sending neuron is known as the pre-synaptic neuron (i.e. before the synapse) while the receiving neuron is known as the post-synaptic neuron (i.e. after the synapse).
a neuron from the axon terminal of which an electrical impulse is transmitted across a synaptic cleft to the cell body or one or more dendrites of a postsynaptic neuron by the release of a chemical neurotransmitter.
yes
Number of times the neuron fires
1. The neuron fires an action potential, sending the electrical signal down the axon.
The neuron adds up all the excitatory and inhibitory inputs and fires when they reach its threshold of excitation.
This phenomenon is known as the "all-or-nothing" principle of action potentials in neurons. When a neuron reaches a certain threshold of depolarization, it fires an action potential, transmitting an electrical signal. If the threshold is not reached, the neuron does not fire. This ensures that signals are transmitted with consistent strength along the neuron's axon.
A neuron fires when its membrane reaches a certain threshold potential. This threshold potential is typically around -55 to -65 millivolts. When the membrane potential reaches this level, an action potential is triggered and the neuron fires.
The threshold potential must be reached for the neuron to fire. This is the level of depolarization that triggers an action potential to be generated and propagated along the neuron.
All or none
All or none
When a neuron fires, it generates an action potential, which is a rapid and temporary change in the electrical charge across its membrane. This occurs when the neuron reaches a certain threshold, causing voltage-gated ion channels to open, allowing sodium ions to rush in and depolarize the cell. Following this depolarization, potassium ions exit the neuron, restoring the resting membrane potential. This electrical signal travels down the axon and triggers the release of neurotransmitters at the synapse, facilitating communication with other neurons.
When a neuron is stimulated enough, it reaches its threshold potential and fires an action potential. This action potential travels down the axon of the neuron, allowing for the communication of signals to other neurons or cells.
A neuron fires an impulse by the influx of sodium ions into the cell. This creates a temporary change in the neuron's membrane potential, leading to depolarization and the generation of an action potential.