BSCI 202 Lecture Notes - Lecture 11: Ideal Gas Law, Thoracic Cavity, Respiratory Tract

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fuchsiafly773

18 Mar 2018

School

University of Maryland

Department

Biological Sciences Program

Course

BSCI 202

Professor

Obrien

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Document Summary

Normal breathing moves 500 ml air/breath (tidal volume) Factors affecting respiratory capacity: size, sex, age, physical condition. Inspiratory reserve volume (irv: amount of air that can be taken in forcefully after tidal volume, 2100-3200 ml. Expiratory reserve volume: air that can be forcibly exhaled, 1200 ml. Residual volume: air in lungs after expiration, 1200 ml. Air that actually reaches respiratory zone=350 ml. Dead space volume: air that remains in conducting zone and never reaches alveoli, 150 ml. Completely mechanical process, depends on volume change in thoracic cavity. Volume changes pressure changes gas flows to equalize pressure. Air moves in and out of lungs by bulk flow. Atmospheric pressure: 760 mmhg at sea level, decreases as altitude increases. Lung pressure given relative to atmospheric (patm= 0 mmhg) Partial pressure= proportion of pressure of entire gas that is due to presence of individual gases. Partial pressure of the gas depends on fractional concentration of gas.

Related Questions

1. Match the word 1-39 above, with the descriptions labled a-t. Word 1-39 can be uses only one please!!

1. alveolar macrophages 2. alveoli 3. Bohr effect 4. bronchi 5. bronchiole 6. cerebral cortex 7. chloride shift 8. compliance 9. costal breathing 10. Daltonâs law 11. diaphragmatic breathing 12. epiglottis 13. eupnea 14. expiratory reserve volume 15. fauces 16. functional residual capacity 17. Haldane effect 18. Henryâs law 19. hilum 20. hypothalamus 21. inferior, middle, and superior nasal meatuses 22. inspiratory capacity 23. larynx 24. limbic system 25. medulla oblongata 26. nose 27. paranasal sinuses 28. pharynx 29. pleural membranes 30. pons 31. primary bronchus 32. secondary bronchus 33. surface tension 34. surfactant 35. terminal bronchiole 36. tertiary bronchus 37. total lung capacity 38. trachea 39. vital capacity

a) -------------------- serves as a sound resonating chamber; contains tonsils; directs air inferiorly

b) ------------------- passes air from pharynx into windpipe; site of sound production

c) ------------------ resonate(s) sound; not part of pharynx

D) ------------------ opening from oral cavity into pharynx

E) ----------------- carries air to a segment of a lung

F) -------------------- carries air directly into a respiratory bronchiole

G) ----------------- surround the lungs

H) ------------------ reduces surface tension at sites of gas exchange

i) -------------------- actual sites of gas exchange

j) --------------------- normal, quiet breathing

k) ----------------------- shallow breathing using just the external intercostal muscles

l) ------------------ amount of effort required to expand the lungs and chest wall

m) ------------------- tidal volume + inspiratory reserve volume, usually about 3600 mL in males

n) ----------------- tidal volume + inspiratory reserve volume + expiratory reserve volume; usually about 4800 mL in males

o) ------------------- residual volume + expiratory reserve volume; usually about 2400 mL in males

p) -------------------- states that the amount of gas that will dissolve in a liquid is proportional to the partial pressure of that gas and its solubility

q) ---------------- when pH decreases, O₂ saturation of hemoglobin decreases

r) ------------------ each gas in a mixture of gases exerts its own partial pressure

s) ------------------- sets basic rhythm of breathing

t) ------------------------ includes the pontine respiratory group

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BSCI 202 Lecture Notes - Lecture 11: Ideal Gas Law, Thoracic Cavity, Respiratory Tract

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