Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

HSO109 pt 9

QuestionAnswer
What are the anatomical divisions of the nervous system? - The peripheral nervous system - The central nervous system
What is the central nervous system comprised of? - Brain - Spinal cord
What is the peripheral nervous system? - Afferent division (sensory) - Efferent division (somatic motor & autonomic motor: sympathetic & parasympathetic)
What makes up a neuron? - Cell membrane - Dendrite - Cell body (soma) - Nucleus - Axon - Myelin sheath - Synaptic terminals
What is the function of myelin sheath? - Electrical insulation increases the speed at which electrical signals (action potentials) traveel along the axon
What is a transmembrane potential? - Is the electrical potential of the cell's interior relative to its surroundings
What is the resting potential? - Is the transmembrane potential of an undisturbed cell
What are action potentials? - Are nerve impulses - Are propagated changes in the transmembrane potential that, once initiated, affect an entire excitable membrane
Describe the all-or-none principle: - A stimulus either triggers a typical action potential, or it does not produce one at all
What is the refractory period? - From the time an action potential begins until the normal resting potential is stabilised, the membrane will not respond normally to additional depolarising stimuli
How does an action potential work? 1. An action potential is generated in a small portion of the membrane 2. A local current depolarises the adjacent portion of the membrane 3. Same events take place over and over 4. Action potential is propagated through the entire excitable membrane
How does an action potential work? pt 2. 5. An action potential only moves forward because previous segment is in refractory period
What affect the speed of action potentials? - Myelin - Axon diameter: large = fast, small = slower
What is the synapse comprised of? - Telodendron - Synaptic terminal - Synaptic vesicles - Synaptic cleft - Neurotransmitters - Ligand-gated channels (receptors w/ neurotransmitters) - Post synaptic neuron
What is a chemical synapse? - Involves a neurotransmitter
What is an electrical synapse? - Direct physical contact between cells (gap junctions)
Created by: 974869485886242