KINE 3012 Lecture Notes - Lecture 5: Tidal Volume, Trachea, Cellular Respiration

• School: York University
• Department: Kinesiology & Health Science
• Course: KINE 3012
• Professor: Michael Connor

Document Summary

Alveolar ventilation: amount of air moved into/out of alveoli, gas exchange only in alveoli, expressed per minute rate, dot represents rate; not dot represents volume. Anatomic dead space: dead space effects alveolar ventilations, air in area where there"s no gas ex(cid:272)hange & not used is dead spa(cid:272)e (cid:894)tra(cid:272)hea(cid:895) Inhalation results in breath in 500ml from atmosphere into respiratory system: the first thing that comes in alveoli is dead air (old) & 350ml from atmosphere. 150ml of air is kept in dead space: the old air is 150 of the alveolar air -that has gone through gas exchange- that remains in airways, rest of airway is necessary for cleaning, warming & moistening air. Accounting for dead space: amount of air that gets to alveolus, tidal volume- dead space = total volume of air enters alveoli, only 70% of air breathed in enters lungs for gas exchange; rest is wasted.