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.
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
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

A&PCh15

Nervous Tissue

QuestionAnswer
The resting membrane potential in neurons is about 70 mV
Threshold for an action potential (nerve impulse) in neurons is about -55 mV
Which channels open at threshold depolarization? Voltage-gated sodium channels
How is the nervous system organized into divisions? It is organized into a central nervous system and a peripheral nervous system
The motor portion of the autonomic nervous system includes Both sympathetic division and parasympathetic division
This type of neuron has many dendrites and one axon. Multipolar neuron
Which axons do Schwann cells myelinate? Most axons in the peripheral nervous system
Which type of channel is opened in response to a change in membrane potential, and are used to generate and conduct action potentials in neurons? Voltage-gated channel
What is a feature of larger-diameter axons? They conduct faster nerve impulses than small-diameter axons
Which axons have the smallest diameter? C fibers
What happens after calcium (Ca2+) enters the synaptic end bulb? It triggers the release of neurotransmitter molecules from the terminal
Name an important excitatory neurotransmitter in the CNS? Glutamate
Analyzing sensory input and making decisions about responses is which function of the nervous system? Integrative function
Subdivisions of the peripheral nervous system include Somatic, autonomic, enteric
What tissues are supplied by the autonomic nervous system? Cardiac muscle, smooth muscle and glands
Which of the following is called the brain of the gut? Enteric nervous system
This type of neuron has one main dendrite and one axon. Bipolar neuron
This type of neuron has many dendrites and one axon. Multipolar neuron
What is a myelin? It is a lipid and protein layering around most axons
What is the role of myelin? It increases the speed of nerve impulses
This part of the central nervous system contains neuronal cell bodies, dendrites, unmyelinated axons, axon terminals and neuroglia Gray matter
saltatory conduction The impulse appears to leap from node to node as each nodal area depolarizes to threshold
Which axons have the largest diameter? A fibers
What happens when a nerve impulse reaches the synaptic end bulb of a presynaptic axon? Voltage-gated calcium channels open
What happens to neurotransmitter molecules after they are released from the presynaptic terminal? They bind to neurotransmitter receptors in the postsynaptic cell
When a postsynaptic neuron depolarizes, the effect is Excitatory
Which of the following is an important inhibitory neurotransmitter in the brain? GABA
Where is one region in the adult human CNS where new neurons are produced? Hippocampus
Where does repair of damaged axons occur? In the PNS