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CP I > Phys 1 Respiratory cycle > Flashcards

Phys 1 Respiratory cycle Flashcards

1
Q

Muscles of inspiration?

A
  • DIaphragm
  • external intercostal muscles
  • scalene
  • sternomastoids
  • additional head and neck muscles
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2
Q

The diaphragm

Innervation?

Action?

result?

A
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3
Q

External intercostal ms

location?

action?

how do they run?

increase what?

A
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4
Q

Scalene?

when is it used?

action?

A
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5
Q

sternomasoids

when used?

action?

A
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6
Q

First step of inspiration?

what does this accomplish?

A
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7
Q

Are lungs and muscles attached to each other?

A
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8
Q

What connects the visceral and parietal pleura?

A
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9
Q

Intrapleural pressure

at rest?

A
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10
Q

Events in inspiration

as the thorax increases in volume what happens?

A
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11
Q

Events in inspiration

drop in intrapleural pressure as the thorax expands what happens?

A
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12
Q

Events in inspiration

when the lungs increase in size what happens?

A
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13
Q

events in inspiration

what happens with alveolar pressure drop?

how far does it have to drop?

A
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14
Q

What do typical graphs show?

is inspiratory airflow positive or negative?

A
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15
Q

Inspiration

Volume change?

Alveolar pressure?

intrapleural pressure?

Airflow?

A
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16
Q

What is the amount of air inhaled in a given breath known as?

what is a normal breath?

what is its abbreviation?

A

Tidal Volume

(VT)

usually around 500 mL

17
Q

Expiratory muscles

What do these muscles cause?

A
18
Q

Events in expiration

From the end of inspiration?

A
19
Q

Events in expiration

once the diaphragm and rib cage are back to their original postions?

A

The decreasing volume causes the intrapleural pressure to return to its starting point

20
Q

What happens to alveoli when rib cage decreases volume?

A
21
Q

The respiratory cycle expiration

what happens to volume?

Alveolar pressure?

Intrapleural pressure?

Air Flow?

A
  • There is now a pressure gradient producing airflow OUT of the lungs
  • the volume in the lung decreases
22
Q

intrapleural vs alveolar pressures

at rest?

with inspiration?

Where is the peak?

With expiration?

Where is the peak?

A
23
Q
A
24
Q

What is Minute ventilation?

A
25
Q

Alveolar ventilation

A
26
Q

How to calculate anatomic dead space?

A

estimated by patients weight in pounds

150lbs = 150 mL

339lbs = 339 mL

27
Q

Minute alveolar ventilation

A
28
Q
A

CP I (21 decks)

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