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A&P II > Regulation of Respiration > Flashcards

Regulation of Respiration Flashcards

1
Q

Unconscious regulation - parts of brain

A

Medulla and Pons

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2
Q

Medulla respiration function

A

regulates BASIC RHYTHM

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3
Q

Pons respiration function

A

modifies rhythm

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4
Q

Average breaths per minute, rhythm

A

12 per mintue

Inspiration 2 seconds, expiration 3 seconds

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5
Q

Dorsal respiratory group (DRG) function

A

Modifies rate and depth of breathing - input from external sources

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6
Q

Pontine Respiratory Group (PRG) function

A

Modifies rhythm - during sleep, exercise, vocalization, emotions

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7
Q

Chemoreceptors for respiration

A

In medulla

Respond to rises in CO2 and H+ Acidosis - increase ventilation

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8
Q

Mechanoreceptors in respiration

A

inflation

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9
Q

Proprioceptors in respiration

A

Contraction of respiratory muscles

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10
Q

Peripheral chemoreceptors

A

In cartoid and aortic bodies - rises in CO2, H+ drop in O2

Increase ventilation

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11
Q

Voluntary control of respiration

A

Hold breath

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12
Q

Hering-Breuer Reflect

A

Stretch receptors in lungs - stiumlates vagus nerve, inhibits inspiratory center and causes expiration
Occurs when tidal volume is 3x normal IE HEAVY EXERCISE

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13
Q

Average total lung volume

A

6L

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14
Q

Tidal Volume

A

Amount of air breathed in and out during normal respiration

~500ml

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15
Q

Inspiratory Reserve Volume (IRV)

A

Additional air that can be inhaled AFTER a normal tidal breath
around 1900-3000ml

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16
Q

Expiratory Reserve Volume (ERV)

A

Amount of additional air that can be exhaled AFTER a normal Expiration
~700-1200ml

17
Q

Residual Volume (RV)

A

Amount of air left in the lungs after a maximal exhalation

~1.5L

18
Q

Inspiratory Capacity

A

Maximum volume of gas that can be inhaled from the end of a resting exhalation

19
Q

Inspiratory Capacity Formula

A

IRV + TV

20
Q

Vital Capacity

A

Maximum volume that can be EXPELLED at the normal rate of exhalation after a maximum inspiration

21
Q

Vital Capacity Formula

A

VC = TV + IRV + ERV

22
Q

Total Lung Capacity Formula

A

TLC = TV + IRV + ERV + RV

23
Q

Forced Vital Capacity (VC)

A

Volume of air that can be forcibly exhaled after a full inspiration

24
Q

Minute Volume

A

Respiratory Rate x Tidal Volume

12 breaths/min x 500ml/breath = 6000 mls/minute

25
Q

Spirometer

A

Measures lung volumes

26
Q

Dead air space

A

air that fills the trachea and bronchi during inspiration (does not undergo gas exchange)
~150ml

27
Q

hypercapnia

A

excessive carbon dioxide in the bloodstream

28
Q

hypoxia

A

deficiency in amount of oyxgen reaching tissues

29
Q

acidosis

A

excessively acidic state of tissues

A&P II (13 decks)

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