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List major anatomy parts Of breathing track
(Start w. Nasal, End w. Alveoli)
What are the parts of the nasal cavity?
What are the parts of pharynx? (Descending order)
- Eustachian tube
What cavity are the lungs in?
How many lobes does the lung have?
(3 on right, 2 on left)
Lungs want to collapse because of?
alveolar fluid surface tension
What prevents lungs from collapsing?
pleural cavity pressure
How do we breath? (describe in terms of pressure)
for air flow (ventilation) there must be a change in pressure!! Low
er pressure INSIDE LUNGS, equals a HIGH
er pressure in the AIR.
- lower pressure INSIDE lungs causes the air to be PULLED IN.
- **(diaphragm constricts, pulling lungs down which creates the lower pressure)
What aids in expanding the lungs?
When administering breathing medication, what area does it target? Why?
- It consists of smooth muscle & no cartilage, it's able to expand/contract easier than bronchi
What is tidal volume?
What is inspiratory reserve?
how much more you can inhale after a normal breath
What is expiratory reserve?
how much more you exhale after normal breath
What is residual volume?
the amount that stays in lungs no matter what
What is vital capacity?
The full range of air you can pull in and out
What is "Dead space"
- the first 150ml of taking air in, before it reaches the lungs. NO gas exchange.
- Advantages: co2 is retained to safe level, air gets filtered (thanks to mucus)and warmed up
What is formula for gas exchange?
- DR - diffusion rate
- ΔP - Change in pressure
- A - area
- D - distance
What can increase distance in?
DR = Change in P * area
this equates to pulmonary edema
What is the name of respiratory control center?
Normal systemic arterial PO2 is?
Normal systemic arterial O2 SATURATION level is?
Normal systemic arterial CO2 is?
Normal systemic veinal PO2 is?
Normal systemic veinal O2 SATURATION is?
Normal systemic veinal CO2 is?
what's the PO2 of the blood in systemic arteries? and the CO2?
- 100 mmHg
- CO2 is 40
- 100% saturation
what's the PO2 of superior vena cava and it's CO2?
- CO2 is 45
- saturation is 75%
What controls breath?
What does CO2 get converted to in tissue gas exchange?
- *an increase in CO2 causes you to breathe
What must we have to have ventilation (air flow)
Change in pressure!!
**Lower pressure in lungs & higher pressure in surrounding air = ventilation
- We get lower pressure in lungs by diaphragm contracting, thus drawing air in.
- Exhale is passive.