Lec 2- week 1- Respiration overview Flashcards
Two types or respiration
external
internal
Exchange of O2 and CO2 between the external environment and the tissue cells
external resp
Occurs in the Mitochondria.
Involves:
- use up of oxygen for metabolic processes to form ATP and
- produce carbon dioxide
Internal respiration (also known as cellular respiration)
What is the role of the conducting zone?
- Distributes air
- Humidifies air
- Warms air
- Traps dust particles
- Removes dust and bacteria
Site of gas exchange
respiratory zone
Cluster of alveoli
alveoli sac
Rate of diffusion across respiratory membrane depends on:
- Surface area for diffusion
- Thickness of membrane
- Pressure gradient of the gasses (O2; CO2)
- Distance which gases travel
- Solubility of gasses (O2; CO2)
(CO2 is highly soluble, O2 is less soluble)
06/27/2024
Atmospheric pressure> pulmonary pressure
inspiration
Atmospheric pressure< pulmonary pressure
expiration
T/F
Air moves from high pressure to low pressure
T
Decreased alveolar or intrapulmonary pressure implies?
Inhalation
(lower pressures, higher volumes)
What is lung compliance?
Ability of the lung to inflate
Increased alveolar pressures or intrapulmonary pressure implies?
Exhalation
(lower pressures, low volumes)
What is the Intrapleural pressure on inhalation?
on exhalation?
754
756
Intrapleural pressure becomes more negative in?? Effect on transpulmonary pressure
Inhalation
Increased transpulmonary pressure becoming more positive
