F - Respiratory Physiology - Control of Breathing - Karius Flashcards Preview

Cardiopulmonary I > F - Respiratory Physiology - Control of Breathing - Karius > Flashcards

Flashcards in F - Respiratory Physiology - Control of Breathing - Karius Deck (18)
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1
Q

Pre-Botzinger Complex

A

Timing of breathing

-also PRG

2
Q

Apneusis and cause

A

Failure of inspiration to stop
Caused by pontine damage
-opposite of apnea

3
Q

PRG

A

Length of inspiration

Lesion - lose ability to turn off inspiration

4
Q

DRG

A

95% premotor to phrenic

Depth of breathing

5
Q

VRG

A

Depth of breathing

6
Q

Apnea and cause

A

Absence of respiratory effort (no inspiration)

Cause - medullary or spinal damage

7
Q

What 3 things cause increase firing of chemoreceptors?

A

Increased CO2, H+ - get rid of it

Decreased O2 - want more O2

8
Q

What is the normal response of a respiratory neuron to an increase in CO2 or a decrease in O2?

A

Decrease in activity - make problem worse

Chemoreceptors are exact opposite

9
Q

2 sets of chemoreceptors

A

Central - brain - slow

Peripheral - carotid, aorta - faster

10
Q

Central chemoreceptors

A

Ventral surface of medulla
Indirectly sensitive to CO2 in blood (H+ in CSF)
Make you breathe regularly

11
Q

Peripheral chemoreceptors

A

Aortic arch, carotid body
Directly sense O2, CO2, H+
Acute changes in blood gases

12
Q

3 Types of Mechanoreceptors

A

Slow - SAR
Rapidly adapting pulmonary stretch receptors - RAR
J receptors - JAR

13
Q

Slowly adapting pulmonary stretch receptors

SARS

A

Sensitive to breath and stretch of parenchyma
Inhibition of inspiration and prolongation of expiration
Important for infants and adults during exercise

14
Q

Which stretch receptors are important for infants and adults during exercise?

A

Slowly adapting stretch receptors

15
Q

2 Sets of mechanoreceptors that are involved in protecting the gas exchange surfaces?

A

Rapidly adapting pulmonary stretch receptors

J receptors

16
Q

Rapidly adapting pulmonary stretch receptors

A

Sensitive to foreign bodies, irritation

Effect - cough

17
Q

J receptors

A

Located near blood vessels of alveoli
Sensitive to pulmonary edema
Effect - cough, tachypnea

18
Q

Cortical influences on breathing?

A

Can override respiratory centers