Found in the Neurons
What is Dendrite
A change in this property of a cell generates an action potential, this property is the measure of potential within a cell relative to the fluid outside. At rest, this is negative.
What is Membrane Potential
This major structure of the Vertebrate Nervous System conveys information to and from the brain as well as produces reflexes
What is the Spinal Cord
This color of matter consists mostly of myelinated axons and can be seen on the inside of a cross section of a brain
What is White Matter
This voluntary part of the peripheral nervous system connects the skeletal muscles to the CNS
What is the Somatic Nervous System
This part of a nerve carries impulses away from the cell body
What is the Axon
This is the stage of Action Potential where the membrane potential begins to increase to and past the threshold
What is Depolarization (or rising phase)
This automatic response happens independently of the brain, not to jerk your knee about this, but its a big deal
What is a Reflex
This type of matter consists of neuron cell bodies, dendrites, and unmyelinated axons
What is Gray Matter
This part of the peripheral nervous system is involuntary and manages the movement of internal organs as well as other processes we cannot control
What is the Autonomic Nervous System
This part of the nerve contains the nucleus as well as the area where the dendrites begin to branch off, meaning nerve impulses flow through here before reaching the axon
What is the Soma or Cell Body
This stage of Action Potential happens after repolarization, where the membrane potential of the cell is more negative than it first started
What is Hyperpolarization or Undershoot
This part of the nervous system has structures like the brain and spinal cord, it is also responsible for the integration of sensory input
What is the Central Nervous System
This fluid fills the hollow central canal of the spinal cord and the ventricles of the brain
What is Cerebrospinal Fluid
The division of the Autonomic Nervous System that is alerted in times of panic, often stimulating the adrenal medulla and accelerating the heart. It understands your situation and wants to help
What is the Sympathetic Division
The myelin sheath that insulates most axons, is made of this type of cell, not to be confused by the large water fowl of a similar name
What is a Schwann Cell
This phase of Action Potential happens after overshoot, when voltage gated potassium channels open to allow a large efflux of potassium, lowering the cell's electropositivity
What is Repolarization (or falling phase)
This part of the nervous system connects the CNS to the organs, limbs, and skin
Your White Matter may work better if the myelin sheath is thicker in this macromolecule, the larger diameter allowing it to conduct impulses faster
What are Lipids
This division of the peripheral contains sensory neurons that carry sensory input towards the CNS
What is the Afferent Division
This is the area of axons between myelin sheaths where the axon is not protected by myelin
What are Nodes of Ranvier
This is a period after action potential is generated where the cell cannot produce another action potential
What is the Refractory Period
The input of sensory information is then integrated by parts of the nervous system, this information is then sent to parts of the body to create this reaction by the body
What is Motor Output
This gap between axon terminals and dendrites is where electric nerve impulses can be transferred between two cells, it is found only in gray matter in the brain
What are Synapses
This division of the peripheral has motor neurons that carry neural impulses away from the CNS towards muscles to cause movement
What is the Efferent Division