The Neuron

What is Reuptake in a neuron ?

When the sending neuron takes back leftover neurotransmitters from the synaptic gap to reuse them.

What is Resting potential in a neuron ?

The resting potential is the stable, negative electrical charge inside a neuron when it is not actively firing a signal

What is Depolarization in a neuron ?

the process where the inside of a neuron temporarily becomes more positive

What is hyperpolirization in a neuron ?

the inside of a neuron temporarily becomes more negative

What is the refractory period in a Neuron ?

The brief "recovery time" after an action potential during which a neuron cannot fire another impulse

What is action potential in a Neuron ?

the electrical impulse a neuron fires to send a signal down its axon.

What is the Presynaptic Neuron ?

The neuron that sends the signal

What is the Postsynaptic Neuron ?

The recieving neuron

What is the threshold in a neuron ?

The minimum level of stimulaton required to trigger an action potential

Why is multiple sclerosis caused ?

The degeneration of the myelin sheath

What are the effects of Multiple Sclerosis ?

Muscle weakness and Coordination problems

What is Myasthenia Gravis ?

An autoimmune disorder where the immune system attacks receptors

What are the effects of Myasthenia Gravis ?

Disruptions in neural transmitions which cause muscle weakness

What is the reflex arc ?

An automatic rapid response to a stimulus