threshold
Motor
At least three neurons are required to carry information from a sensory receptor to the somatosensory cortex. The first neuron is located in the sensory receptor, the second neuron is in the spinal cord or brainstem, and the third neuron is in the thalamus before reaching the somatosensory cortex.
Neuron has to be stimulated to the point of it's threshold in order for an action potential to be initiated and transmitted
excitatory message
The minimum level of stimulation required to trigger a neural impulse is known as the "threshold." This threshold is the minimum amount of neurotransmitter release or electrical stimulation needed to generate an action potential in a neuron. Below this threshold, the neuron will not fire an action potential.
Because it didnt have a stimulus to activate depolarization
Synaptic transmission, also called neurotransmission, refers to the process wherein neurotransmitters are released by a neuron to activate the receptors of another neuron. Communication between two nerve cells is accomplished by synaptic transmission.
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opposite of an afferent neuron. an efferent neuron goes from the central nervous system to the organ in the body that will perform the required action.
Diverging circuits
Signalling ALONG a neuron is electrical, but signalling BETWEEN neurons is a chemical process. Neuron A 'passes' a message onto the next by releasing chemicals called neurotransmitters , which are then taken up by neuron B. The point at which these neurotransmitters are released from the neuron A is called the 'terminal bouton' and is the end of its axon. More specifically, it is the presynaptic membrane OF the terminal bouton at which the passing on of a message occurs.
The cell body or soma of a neuron contains the machinery for protein synthesis, such as ribosomes and the endoplasmic reticulum. This is where the production of proteins required for the functioning of the neuron takes place.