bio265_document_section6.2StudyGuide.docx - BIO 265 Section...

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BIO 265 Section 6.2: Study Guide Section 6.2 Objectives: Explain how ventilation occurs and how the pressures influence inhalation and exhalation. Discuss the main factors and laws that influence the rate at which gasses will cross the respiratory membrane. 6.2 – RESPIRATORY PRESSURES Explain how ventilation occurs and how the pressures influence inhalation and exhalation. o Understanding the respiratory system requires combining the understanding of several physical laws to explain how air flows. As you learn about these laws fill out the Laws of Respiration charts contained in this study guide: Resources: Airway Resistance - system/ventilation/airway-resistance/ Poiseuille’s Law: Laws of Respiration: Poiseuille’s Law One-liner description of this law: Diameter effects resistance Inversely proportional Diameter up, resistance down Formula: Flow = (P1 – P2)/R Draw your own picture illustrating this law: Principles that are important in understanding this law: Define pressure gradient. Area of high and low pressure o Fill in the blank: Air always flows from _high_ to _low_ pressure. Page 1
BIO 265 Define resistance. Respiratory passage airflow rate

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