Describe receptor and generator potentials and sensory adaptation.
Describe receptor and generator potentials and sensory adaptation.
Neuron or nerve cells are cells that act as messengers, they are able to undergo electrical excitations from one neuron to another via specialized connection points called synapses. Most neurons have a cell body, an axon many terminal branches called dendrites which are able to receive messages from other neurons. The cell body contains the nucleus and cytoplasm. The axon extends from the cell body giving rise to smaller branches ending at nerve terminals. When neurons send or receive chemical signals as messages, they transmit electrical impulses along their axons which are covered with a layer of myelin sheath (composed of an insulating fatty substance), helping it accelerate the transmission towards the dendrites and gets passed on to the next nerve cell, or target tissues, breaks in between myelin sheath called node of Ranvier allow the generation of a fast electrical impulse along the axon. The brain is the central organ that commands the motor neurons to carry out a movement in the concerned muscle in response to a stimulus. This command is transmitted via motor neurons that emerge from the spinal cord, and extends in close proximity to the muscles.
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