Anatomy & Physiology: Respiratory System
Terms
undefined, object
copy deck
- Within pleural cavity; less than pressure in alveoli
- intrapleural pressure
- Expiration: thoracic/inrtrapulm. volume incr/decr?
- decr
- Most soluble?
- CO2
- Inspiration causes volume of thoracic cavity: increase/decrease?
- incr
- Expiration: air pushed where?
- out
- At a high altitude, atm pressure INCR/DECR thus partial pressure INCR/DECR.
- decr decr
- Ideal gas law
- P = 1/V
- Inspiration: pressure in lungs: increase/decrease?
- decr
- Normal quiet breath
- Tidal volume
- TV + IRV + ERV
- Vital capacity
- half as soluble as C02
- 02
- Inspiration: vacuum created, air does what?
- pushes into lungs
- Vol of air that can be forcebly inhaled beyond TV
- inspiratory reserve vol
- Total pressure exerted by a mixture of gases is the sum of what?
- pressures exerted by each gas in the mixture
- Nearly insoluble
- N2
- Gases always move from - pressure to - pressure.
- higher lower
- when does Inspiration end?
- intrapulmonary pressure = atm pressure
- O2, CO2 must be transported to and from lungs and body tissue cells via blood stream.
- Respiratory gas transport
- Pressure within alveoli of lungs.
- Intrapulmonary pressure
- Diaphragm contracts, ribcage rises
- inspiration
- Air in airsacs of lungs continually changing and being refreshed: breathing
- pulmonary ventilation
- high pressure conditions
- hyperbaric conditions
- used to force greater amounts of oxygen into blood
- hyperbaric chamber
- At systemic capillaries gas exchange occurs between blood and tissue cells.
- Internal respiration
- Gas exchange- O2 loaded, CO2 unloaded
- External respiration
- Always described relative to atm pressure (760 mmhg).
- Respiratory Pressure
- Vol that can be forcibly exhaled byond TV
- Expiratory reserve
- Diaphragm relaxes, ribcage down
- expiration
- Vol of air left in lungs that cannot be voluntarily expelled; allows gas exchange to occur between breaths, keeps alveoli inflated
- Residual vol
- BC of Henri's law, the greater the concerntration of gas in gas phase, the (more, faster)/(less, slower) it will go into a solution
- more faster
- narcotic effect as a result of n2 dissolving into the blood
- nitrogen narcosis
- if divers ascend too quickly what happens?
- bubbles out of the tissues and make its way into muscles and bone- "the bends"