Save
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
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

Phys Lect 21

QuestionAnswer
Response to spinal cord denervation: Can Parasymp/symp response return to an organ after innervation has been cut? Yes, over time, the organ will increase its sensitivity to the neurotransmitter by increasing the number of receptors (Upregulation). **pupil dilation will return after sup cervical ganglionectomy
How do Parasymp and symp preganglionic cells differ in their postganglionic synapses Parasymp: Pregang synapse with FEW postgang cells. Symp: Pregang synapse with MANY postgang (also has a bigger response due to chromaffin cells)
Function of Alpha 2 adrenergic receptors in BOTH symp and Parasymp A2 receptors are located on the presynaptic neuron axon terminal membrane. NE/E binds and causes inhibitory response (Cl- influx or K+ efflux). This makes the symp signaling brief and turns off parasymp when symp are very active.
What type of process is Vasodilation? PASSIVE. it is a decrease in sympathetic tone (firing) to the BL vessels. **Less than the normal resting tone.
What happens to the BL vessels if there is an increased sympathetic tone/ firing rate Vasoconstriction. **Unless there is a higher density of B2 receptors and Epi has been released in the BL by the chromaffin cells.
Referred pain: Erythema in response to gallbladder infection? B/c the sensory afferents synapse at the same level as the symp cutaneous efferents (A2 rec), vasodilation can occur in the right upper quadrent due to increased inhibition of symp tone. **Also synapses with a motor neurons of abdominal muscles (Firmin
Hyperesthesia Increased sensitivity to touch. Caused convergence of peripheral and abdominal afferents going to pain centers in brain
Hyperalgesia Increased sensitivity to pain. Caused convergence of peripheral and abdominal afferents going to pain centers in brain
Main control centers in the Medulla Oblongata 1.Circulatory Center. 2.Respiratory Center.
Main control centers in the Pons 1.Micturition (INHIBITION 99% of time).
What is the central monitor of ANS? Hypothalumus. Receives inputs from midbrain, CSF, and BL
Created by: WeeG
 

 



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