Respiratory System Flashcards
Studied by 0 people
View linked note
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/7
Earn XP
Description and Tags
Flashcards about the respiratory system, gas exchange, transport, and control of ventilation.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
8 Terms
External Respiration
The exchange of oxygen and carbon dioxide between the air in the alveoli and the blood.
Internal Respiration
The exchange of oxygen and carbon dioxide between the blood and the tissues.
Exchange of respiratory gases depends on…
Differences in the partial pressures of a gas, the thickness of the membrane, and the total surface area available for gas exchange.
Features that help gas exchange
Moist alveolar surface, thin respiratory membrane, large surface area, and many capillaries surrounding each alveolus.
Oxygen transport in blood
Almost all (98.5%) is chemically combined with haemoglobin (Hb).
Carbon dioxide transport in blood
Most (78%) is transported as bicarbonate ions in plasma.
The role of the respiratory centre
Controls the basic rhythm of breathing via the medulla oblongata and pons.
Modification of the basic rhythm
Cortical influences, the inflation reflex, and chemical stimuli (changes in pCO2 levels, H+ concentration, and large decreases in pO2).
Flashcards (63)