General Review Flashcards
Nervous tissue contains two categories of cells:
Neurons & Neuroglial Cells
What are the 2 parts of the Nervous System?
Central Nervous System (CNS)
& Peripheral Nervous System (PNS)
The Peripheral Nervous System contains 2 parts called__.
Somatic Nervous System (Voluntary)
&
Autonomic Nervous System (Involuntary)
Somatic (Voluntary) sends to___.
Skeletal Muscles
Autonomic (Involuntary) sends to ____.
Smooth muscles, Cardiac muscles, & Glands.
What are the 3 general functions of the Nervous System?
- Receiving stimuli (Sensory function)
- Deciding about stimuli (Integrative function)
- Reacting to stimuli (Motor function)
Remember “SIM” for function
Neurons share what certain features?
Dendrites, cell body, and axon.
If myelinated, a cell body will be____, and an axon will be___.
grey, white
White matter contains___.
Myelinated axons.
Grey matter contains___.
unmyelinated structures
In which 2 locations is gray matter surrounded by white?
Spinal cord & Cerebrum
In which 2 locations are white matter surrounded by grey matter?
Cerebral & Cerebellum
This is reversed from the spinal cord & cerebrum
True or False:
All Sensory Neurons are Uni-Polar.
TRUE
Bipolar has how many poles?
2
Unipolar neurons have how many poles?
1
Multipolar neurons have how many poles?
Many (Most neurons of the CNS)
What cells myelinate axons in PNS?
Schwann Cells
What cells myelinate axons in CNS?
Oligodenrocytes
Name #1 out of the 4 types of cells in CNS & its function.
- Microglia- “garbage man” removes damaged neurons & infections.
Name #2 out of the 4 types of cells in CNS & it’s function.
- Astrocyte- formation of blood/brain barrier
Name #3 out of the 4 types of cells in CNS & its function.
- Oligodendrocyte- myelinates axons
Name #4 out of the 4 types of cells in CNS & its function.
- Eperidyma - lines ventricles of the brain
Synapse =
Space
“Messenger” that is released when impulse reaches synaptic knob. Ex; serotonin, dopamine.
Neurotransmitter
What is the Cell Membrane Potential?
-70mV
Na+ (sodium) into the cell causes__?
Depolarization