quiz 1 Flashcards
Dendrites
receive info
Axon Hillock
where axon originates (cone shaped), where info is gathered & integrated
axon
Carries action potential from cell body to axon terminal
myelin
insulates axons to increase speed that action potentials are conducted, formed by glial cells
Nodes of Randeveir
uninsulated patches of axon, increases signal boosting
Axon terminals
transmit neuron’s signals across synapses to other cells
axon collateral
axon splits into multiple branches
Input Zone
Neurons collect & process info from the environment to other cells
Integration Zone
Decision to produce Neural signal
conduction zone
info is transmitted over distances (axon)
Output Zone
Neuron transfers info to other cells (axon terminal)
Multipolar Neuron
1 axon, multiple dendrites
Bipolar Neuron
1 axon, 1 dendrite (sensory systems - vision, smell, sight)
Unipolar Neuron
after leaving cell body splits into 2 sections - dendritic branches & axon (spinal & cranial nerves - pain, temperature, etc.)
Presynaptic Membrane
transmits info by releasing neurotransmitter (on axon terminal)
Synaptic Cleft
space between pre / post synaptic neurons
Postsynaptic Membrane
receives info
Axonal Transport
transport materials from cell body to axon terminals & back to cell body
Electrical Movement
electrical signals down axon to target innervating neuron
Schwan Cells
Type of Glial cell that forms Myelin in peripheral Nervous System
Microglial Cells
remove cellular debris from injured / dead cells (Glial Cell)
Oligodendrocytes:
form myelin in CNS & myelinates axons (glial cell)
Astrocystes
star shaped, run in all directions, control blood flow, help form membrane that contains the brain (glial cell)
Peripheral Nervous System
nerves & neurons outside the brain / spinal cord
Somatic Nervous System
major muscles / sensory systems, receives info VOLUNTARILY (PNS)