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54 Cards in this Set

  • Front
  • Back
______ is many organs working together for a common thing
organ system
______ division tends to arouse the body for action, fight or flight.
_____ division prepares you to be relaxed.
_____ makes proteins
_____ holds cell and gives it shape.
2 ways nervous system can be broken down based on anatomical location
central- brain & spinal cord
_____ is the primary site for recieving signals from other neurons.
Do neurons undergo mitosis?
rarely, if ever
Which has better polyunsaturated fats, baby formula or breast milk?
breast milk
_____ is an inicator of aging from wear and tear on lysosomes.
3 universal properties of neurons
1) excitability/irritability
2) AP conduction
3) neurotransmitter secretion
Dumping serotonin to make it contract is and ex. of ________.
neurotransmitter secretion
3 functional classes of neurons
1) sensory (afferent)
2) interneurons (association)
3) motor (efferent)
_____ neuron brings info. into central nervous system
sensory (afferent)
_____ neuron carries info. to the other side; inbetween
interneurons (association)
_____ conducts signals from the CNS to effectors such as muscles and glands; leaving.
motor (efferent)
glia cells are not neurons b/c they aren't exciteable and can't send an ________.
action potential
3 primary types of neuron
1) Multipolar
2) Bipolar
3) Unipolar
_____ neuron is the most common in the body.
_____ neuron is associated with smell.
Where is the soma placed in a unipolar neuron?
off to the side
Which of the 3 primary types of neurons contain many dendrites instead of 1 main dendrite?
In neurons passing ______ makes neurons exciteable.
In neurons, the wave of self-promoting depolarization is called an __________.
action potential
Which are there more of, neuroglial cells or neurons.
neuroglial cells
Neuroglial cells are critical for the support of neuron _____.
Are neuroglial cells exciteable?
no, so they can't send an action potential
4 types of nonexciteable glia cells of the CNS
1) Astrocytes
2) Ependymal cells
3) Microglial cells
4) Oligodendrites
_____ cell composes 90% of brain tissue, supports/ protects neurons, and is found in the blood brain barrier.
_____ cells produce cerebral spinal fluid.
______ cells are macrophages of the CNS, protect nervous tissue from infection, and help clean up dead cells.
______ wrap around neurons in CNS.
2 cell type of PNS
1) satellite cells
2) schwann cells
_____ cells are near the soma in ganglion.
_____ cells wrap around neurons in the PNS.
2 types of supportive cells for AP conduction
1) oligodendrites
2) schwann cells
____ form myelin sheath around axons in the brain/CNS
In ____ disease the oligodendrocytes and myelin sheaths of the CNS dteriorate.
_____ cells form from myelin sheath around axons in the PNS
_____ cells aid in regeneration of damaged nerve fibers.
The myelin sheath is very rich in _______ fats and sensitive to toxic lipids.
The myelin sheath does not permit electrical conduction, so ____ cannot pass through.
The gaps of exposed axolemma are called ______.
Nodes of Ranvier
Unmyelinated neurons have limits to their function and are especially poor at _________.
neuronal regeneration
Myelin sheaths help protect neurons and help to conduct action potential at a ______ rate or speed.
____ is the source of mRNA and most biosynthesis.
_____ describes how things get to the synaptic ending (fast or slow).
axonal transport
mm/day for fast axonal transport
3 daily use materials for fast axonal transport
1) organelles
2) vesicles
3) proteins
3 pathogens of fast axonal transport
1) polio
2) herpes
3) rabies
If you know where the ______ entered a neuron, you can time the appearance of symptoms in the CNS to the rate of transport.
mm/day for slow axonal transport
0.5 to 10mm/day
Which axonal transport provides materials for axonal growth/repair/regeneration, fast or slow?
______ describes how sodium and potassium ions distribute across the plasma lipid bilayer when an excitable cell (ex. myofiber or neuron) is at rest.
resting membrane potential