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

Respiratory Phys 8

WVSOM -- Control of Ventilation

QuestionAnswer
How will arterial PO2 change in hypoventilation? will go down
How will arterial Pco2 change in hypoventilation? go up
How will arterial pH change in hypoventilation? go down
What does ventilatory contol do? maintains arterial PO2 and Pco2 in the face of changing demands
How is the respiratory system controlled? thru negative feedback
What is the regulated variable in the respiratory control system? arterial Pco2
What is the sensor in the negative feedback look for respiratory control? chemoreceptors
What is the effector in the negative feedback look for respiratory control? respiratory muscles
What are the 3 basic elements of the respiratory control system? respiratory muscles, arterial Pco2 and chemoreceptors
Where is the respiratory control center controlled? pons and medulla
What are the two basic roles of the respiratory control center? integration and pattern generation
What can voluntarily override the medulla and pons? the cortex by voluntary override and the hypothalums/limbic system with emotional changes
What does the Pons and medulla integrate? chemoreceptors, lung receptors and the cortex/hypothalamus/limbic system
What are the three main collections of neurons that control inspiration and expiration? pneumotaxicc center, apneustic area and medullary respiratory center
What does the pneumotaxic center do? fine tuning
What does the apneustic area do? prologns inspiration
What does the medullary respiratory center do? respiratory pattern.
What are the two main groups of neurons in the medullary respiratory center? dorsal respirtatory group and ventral respiratory group
What do the dorsal respiratory group do? mainly inspiration
What does the ventral respiratory group do? mainly expiration
Where is the pneumotaxic center at? pons
Where is the apneustic area located? lower pons
What synchronizes onset of inspiration and expiration? integrator neurons
What lung receptors promote expiration? lung stretch receptors
What receptors promote inspiration? irritant
What do C-fibers do? dectect inflammation and cause rapid, shallow breathing
Where are C-fibers? bronchi
What do J receptors do? dectect interstitial edema and promote rapid shallow breathing. Located in alveoli
Why are J receptors called J receptors? they are close to junxtacapillaries
What are the 2 groups of chemo receptors? central and peripheral
What is the primary chemo receptor? central
Where is the central chemocreceptors? medulla
Where are the peripheral chemoreceptors? carotid and aortic
What do central chemoreceptors respond to? pH of the CSF which is dependent on arterial Pco2
What do peripheral chemoreceptors mediate? ventilatory response to hypoxia as well as respond ot arterial Pco2 and pH
What is the most important parameter controlling ventilation? arterial co2
How much of an increase does it take in Paco2 to double ventilation? 2mmHg
How much PaO2 must be reduced for a significant increase in ventilation? <50mmHg
What decreases sensitivity to arterial Pco2? sleep, COPD and depressant drugs
What is the main chemoreceptor to drive breathing in severe COPD? peripheral
Which chemoreceptors respond faster? peripheral
What chemoreceptor gives most of the response? central chemoreceptors. Peripheral chemoreceptors provide only 20%
Why do peripheral chemoreceptors respond faster? they sense the blood first
Decreased areterial PO2 is detected by which receptors? peripheral chemoreceptors
Explain Cheyne-Stokes respiration? There is hyperventilation from stimulation of J receptor stimulation because of hypoxemia. Then there is a decreased Paco2 which causes apnea
Which chemorecpetors are important in the ventilatory response to hypoxia? peripheral
Created by: tjamrose
Popular Physiology 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