KAAP221 Lecture Notes - Lecture 15: Respiratory Minute Volume, Transversus Thoracis Muscle, Functional Residual Capacity

• School: University of Delaware
• Department: Kinesiology & Appl Physiology
• Course: KAAP221
• Professor: Shannon Lennon

Document Summary

Lecture 15: respiratory muscles and pulmonary volumes, respiratory muscles. No primary expiratory muscles - quiet breathing, exhalation is passive (no skeletal muscles needed to push air out); elastic forces and gravity reduce volume of lungs. Helps predict the movement of respiratory gases - partial pressure is higher of o2 in alveoli than capillaries; at tissue level, movement of o2 from capillaries into surrounding tissues because partial pressure of. O2 is higher in the capillaries than in the tissue: external respiration. O2 - po2 is 100 in alveoli and 40 in capillaries; facilitates movement out of alveoli into capillary. O2 - po2 in capillary is about 95, and 40 in interstitial fluid; facilitates movement out of systemic capillaries and into tissue. At 90 po2 - percent represents that average po2 of blood entering the systemic circuit; hb is. Drop down to 40 po2 - still 75% hb saturated - blood leaving tissues.