INTRO TO NEURO Flashcards
What is the neuron doctrine
The brain is composed of independent cells, but is connected by synapses
What happened to trey
The trauma to his head ended up causing his head to fill up with water (EDMA)
What is a unipolar neuron
one pole- reliable information-basically the fast toll on the highway
What is a bipolar neuron
two poles-usually sensory
what is a multipolar neuron
lots of poles- most common- slow but crucial in transmitting info through the body
What is the input zone
neurons collect info from the external environment(light, sound, touch)
What is the integration zone
decides what gets through
what is the conduction zone
portal info gets transmitted through
what is the output zone
makes a connection to the intended neuron
what are two types of brain cells
neurons and glial cells
(neurons are like the reality stars and glia is like the camera crew/helpers)
what are sensory neurons
neurons that respond to environment
What are motorneurons
how we move- contact muscles
what are interneurons
receive input and decide what to do with it( main type of neuron)
what do glial cells support
the brain
what are the four types of glial cells
astrocytes, oligodendrocytes, ependymal cells, and microglia
what are astrocytes
like a mother- keeps you grounded, cleans up, supports you, and link between the BLOOD- BRAIN BARRier
What is a oligodendrocyte
They wrap axons with myelin sheaths
What are nodes of Ranvier
gaps between the myelin that are essential to the cell
what is multiple sclerosis
immune system makes a mistake and attacks the myelin
What is microglia
cleans up trash, and kills some cells
What are ependymal cells
makes spinal fluid-sucks in and spits out spinal fluid
what do dendritic spines do?
they change and grow when we learn something-increasing surface area
neural plasticity
grows by experience
What is apart of the autonomic nervous system
Sympathetic activation and parasympathetic activation
