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Receives stimuli via receptors
Sensory Input
Activates the body’s response
Motor Output
Control center/ communication
Nervous system Function
Neuroglia
Supports Nerve Cells
Receives Signals for the Neurons
Dendrites
Covers the Axon, and Speeds up the action potential
Myelin Sheaths
Processes stimuli and decides what the body should do
Integration
Nerve Cells
Neurons
Contains the nucleus of the nerve cell
Cell Body
Conducts action potentials
Axon
All the nerves in your body (the communication system)
Peripheral Nervous System
Sends out information from the brain
Motor Division
Controls Involuntary Movement
Autonomic Nervous System
Fight or flight response (excites your body)
Sympathetic Nervous System
Brain and Spinal Cord (control center)
Central Nervous System
Receives sensory information and sends it to the CNS
Sensory Division
Controls Voluntary Movement
Somatic Nervous System
Rest and Digest Response (calms you down)
Parasympathetic Nervous System
more potassium is inside the cell and more sodium is outside the cell.
Resting Stage
Resting potential is measured at
-70mV
threshold for action potential is
-55mV
a quick, temporary change in a cell’s electrical charge, caused by the movement of ions across its membrane.
Action Potential:
potassium ions start to leave the cell, which helps bring the charge back down to
Repolarization
The sodium Potassium pump pushes out 3 sodium ions and brings in 2 potassium ions, making the inside of the cell more
negative than the outside.
During absolute refractory period, you .......... trigger another action potential.
Cannot