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28 Cards in this Set

  • Front
  • Back

Types of Glia

Macroglia


(Astrocytes


Oligodendricytes


Schwann Cells)


Microglia

Neurons control

Cells of CNS


Informations processing and communication

Astrocytes

Provide structural matrix supporting neuronal networks.


Control extra cellular chemical environment "blood-brain-barrier"

Classes of neurons (3)

Sensory Neurons- specialized to receive information from outside the world



Interneurons - act as bridges between the sensory and motor systems.



Motor Neurons- transmit commands from CNS directly to muscles and glands

Dendrites

Receive signals from adjacent Neurons

Axons

Transmit signals


Axon hillock, terminal


Myelination


Nodes of ranvier

Levels

Circuit level


Cellular level


synaptic level


Molecular level

Neurotransmission

1. Synthesis


2. Storage


3. Release


4. Receptor interaction


5. Inactivation


6. Re-uptake


7. Degradation

Electrostatic force

Opposite charges attract + and -

Diffusion Force

Molecules move from areas of high concentration to areas of lower concentration.

Metabotropic receptors

G protein causes ion channel to open and Ions pass through

Ionotropic Receptors

Channel opens and ions pass through after binding to ion channel

What happens to neurotransmitters after they're released

Diffusion


Deactivation Enzymes


Presunaltic Reuptake

Extracellular fluid


Intracellular fluid

Extra = +


Inter = -

Depolarization

(Increasingly negative)

The interval in which no stimulus whatsoever can produce another action potential is known as the

Absolute refractory period

Diffusion and electrostatic pressure

Closure of both voltage-dependent potassium and sodium channels results in

Hyperpolarization

The resting your own membrane allows ___ to cross freely

Potassium

Hypolarization

Increasing positive

Diffusion and electrostatic pressure

What type of glia provides the structure for Neurons

Astrocytes

Mitochondria

Extracts oxygen and pyurvic acid from sugar in the intracellular fluid.

What types of glia supply myelin for the central nervous system

Olgodendrocytes

The most common structural neuron in the vertebrate nervous system is the

Multipolar neuron

What type of glia clean up dead cells and other debris

Microglia

The intercellular fluid of the resting neuron contains large numbers of

Potassium ions

The tendency for modules to distribute within a medium such as air or water is called

Diffusion.