Week 10: Respiratory 5 Flashcards Preview

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Flashcards in Week 10: Respiratory 5 Deck (11)
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1
Q

What is the diaphragm innervated by?

A

the phrenic nerve

2
Q

What does the Pre-Bot zinger complex do?

A

forms the action potential that drives breathing movement

3
Q

What are the respiratory neural groups?

A

DRG (dorsal)

VRG (ventral)

PRG (pontine)

4
Q

Draw the diagram summarizes the wiring of the brainstem ventilatory control. Describe A, B and C

A

A: results in inspiration

B: provides info about the stretching of the lung

more stretched = more firing

C: inhibits A

* all of this ensures proper frequency of breathing *

5
Q

What controls breathing?

A

chemoreceptors

6
Q

Where are the three CO2 sensitive areas located?

A

posteriorly on the medulla next to the basilar artery

(R, I, and C)

7
Q

How do the chemorecptors adjust breathing?

A

↑PCO2 = ↓pH

as PCO2 increases more HCO3- is produced therefore more H+ are produced which will decrease the pH

8
Q

What receptors sense hypoxia? Where are they located?

A

peripheral chemoreceptors located in the aortic arch and carotid sinus

9
Q

What is the normal PCO2 ?

A

40 mmHg

10
Q

What is the graph displaying the effect of H+ on ventillatory response?

A

↓ pH = ↑ rate of breathing (during exercise)

↑ pH = ↓ rate of breathing

11
Q
A