Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Anatomy Mod 7 Test

Anatomy

QuestionAnswer
Bundles of neurons and heir coverings, which are found outside the CNS. Nerves
Collections of neuron cell bodies that are found outside the CNS. Ganglia
Nerves that originate from the spinal cord. Spinal nerves
Nerves that originate from the brain. Cranial nerves
Neurons that transmit action potentials from the sensory organs to the CNS. Afferent neurons
Neurons that transmit action potentials from the CNS to the effector organs. Efferent neurons
PNS neurons that transmit action potentials from the CNS to the skeletal muscles. Somatic motor nervous system
PNS neurons that transmit action potentials from the CNS to the smooth muscles, cardiac muscles, and glands. Autonomic nervous system
Division of the ANS that generally prepares the body for increased energy expenditure. Sympathetic division
Division of the ANS that regulates resting and nutrition-related functions such as digestion, defecation, and urination. Parasympathetic division
A neuron that conducts action potentials from one neuron to another neuron within the CNS. Association neuron
The ability to undergo an action potential in response to a stimulus. Excitability
A measure of the charge difference across the cell membrane. Potential difference
As you read this question, cells in your eyes are sending information to your brain which you bran uses to form an image of the words that you read. Is this information being sent along afferent or efferent nerves? Afferent nerves.
When you are digesting food, smooth muscles contract your stomach. Is this controlled by the afferent or efferent division of the PNS? What would be the most specific way to describe the nerves involved in this situation? Efferent division. They are a part of the autonomic nervous system, and the parasympathetic division.
An axon is covered by an oligodendrocyte. Is it a part of the CNS or PNS? Will it regenerate a new axon, if severed? CNS. No.
An axon is covered by several Schwann cells. If it is severed, will it definitely heal? Why or why not? No. The axon may have shifted to far for the myelin sheath to guide it back into place.
At one point on the axon, there is a high concentration of K+ outside the cell and a high concentration of Na+ inside the cell. Is the neuron at rest? No. Depolarization.
At one point on the axon, there is a high concentration of Na+ outside the cell and a high concentration of K+ inside the cell. Is the neuron at rest? Can't tell.
A stimulus creates a change in the potential difference between the inside and outside of the cell so that it is less negative, but no action potential is created. What is this called? Subthreshold stimulus.
What keeps an action potential on an axon from stimulating another action potential that will travel back towards the cell body? The absolute refractory period.
Why do myelinated axons carry action potentials faster than unmyelinated axons? Myelinated axons allow saltitory transmission from node of Ranvier to node of Ranvier.
When you cut yourself, you feel an instant, sharp pain, followed a bit later by a dull ache. Why do you get these two different pains, and why do they come in that order? They come from both myelinated and unmyelinated neurons. The action potential travels down the myelinated neurons faster.
If you press your finger lightly against an object, you feel a certain amount of pressure. Pressing harder against that same object causes you to feel more pressure. What is the difference between the action potentials in these two situations? Frequency.
The potential difference in a postsynaptic neuron changes from -85 mV to -95 mV at the point of a synapse. What has happened? What can you say about the relative amounts of K+ and Na+ outside the membrane? Hyperpolarization. K+ amounts will increase outside the membrane, while the amount of Na+ stays the same.
Twelve action potentials are traveling down an axon in a very short time period. They reach a synapse, and the postsynaptic neuron sends only two action potentials down its axon. Is this an excitatory synapse of an inhibitory synapse? Excitatory. Many EPSP create one action potential.
Created by: 100006766900221
Popular Anatomy sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards