Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

34 Cards in this Set

  • Front
  • Back
The Central Nervous System is composed of what?
Brain and Spinal Cord
The Peripheral Nervous System is composed of what?
31 pairs of Spinal Nerves, 12 pairs of Cranial Nerves, and the Autonomic Nervous System
What involved receptos who gather information and send nerve impulses to CNS for integration?
Sensory Function
Nerve impulses from receptors are integrated in CNS
Integrative function
Nerve impulses sent from CNS to effectors that lie outside CNS (muscles and glands)
Motor Function
Impulses that move towards or into the CNS
Impulses that move away from or out of the CNS
The nervous system works with what system that results in complete communication and control within the body?
Endocrine (hormones) System
Functional Cells which carry impulses to other neurons and to cells outside the nervous system
What contains soma, cuton, and perikaryon? Has nuclus, mitochondria, Golgi bodies, microtublues, neurofibrils, Nissl bodies, Cytoplasmic inclusions.
Cell body
What provide support for dendrites?
What do Nissl bodies do?
Similar to RER. Produce protein.
Fibers that carry a nerve impulse towards the cell body.
Dendrites - Many dendrites in cell. Often short and highly branched. Are RECEPTIVE processes. Often have dendritic spines (contact points for othr neurons). Some can be very long.
One large fiver that carries a nerve impulse away from the cell body.
Axon - Many mitochondria, microtubules, nerofibrils. Can give off branches called collaterals.
What conveys substances made in cell body (ex. neurotrasmitter substances)
Axonal Transport
Specialized ends of axons. Contact receptive surface of another cell.
Presynaptic terminal or membrane
Elevated portion of soma where axon arises.
Axon Hillock
SOME axons are TIGHTLY enclosed in sheaths composed of what?
Schwann Cells - tightly wrapped around axons. Gives many layers of cell membrance that have little or no cytoplasm between them. Composed of lipoprotein.
What does lipoprotein do?
Forms myelin sheath on outside of axon.
Gaps between adjacent Schwann cells along an axon (and myelin sheath) are called what?
Nodes of Ranvier
Schwann Cells (a neuroglial cell) not tightly enclosing the axon.. thus
axons lack myelin sheaths and are reffered to as unmyelinated nerve fibers. Or GRAY MATTER.
Unmyelinated Nerve Fibers
Gray Matter

- In brain and spinal cord.
Myelinated Nerve Fibers
White Matter
In CNS, myelin is produce by what?
In the PNS what is essential for nerve regeneration?
Neurilemmal shealth and endoneurium.
50% of Brain Cells. Fills spaces, Support neurons, provide frameworks, prevent neutonal contact except in specific places.
Neuroglial Cells
CNS. star-shaped, bind neurons to blood vessels, provide structure. Largest neuroglial cell, most numerous, helps maintain chemical conc. in exclr. fluid. Regulates substanc transfer. Scar tissue formation.
CNS. From myelin within brain and spinal cord. Send our cellular processes. Wraps axons. No neurilemmal sheaths or endoneurium.
CNS. Phagocytic cells. Necrotic tissue and foreign antigrans. Is a macrophage, and increase in #.
CNS. Epithelial cells line the ventricles in bain and central canal of cord. From a poroud epithelial layer between brain and cord's interstitial fliud and CSF in ventricles anc central canal. Allows Substances to diffuse from interstitial flius to the CSF.
Type of neuron that send affert sensory impulses from receptors in peripheral body parts to brain or spinal cord (CNS)
Sensory Neurons
Type of neuron that transmits nerve impules from one neuron to another within the brain or cord. Confined to CNS.
Interneurons (association neurons)
Type of neuron that conducts efferent motor impulses from brain or cord to effectors. Away from CNS.
Motor Neurons
Cell body damage usually results in what?
Neuron death