TOPIC 15- LEARNING OUTCOMES.docx

TOPIC 15- LEARNING OUTCOMES.docx - TOPIC 15 LEARNING...

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TOPIC 15- LEARNING OUTCOMES 1. Partial pressure a. Measure of concentration of individual components in a mixture of gases… the rate of diffusion of a gas is proportional to its partial pressure within the total gas mixture b. O2 & CO2 diffuse from where their partial pressure is higher to lower 2. Gas exchange 5 steps? a. Ventilation, diffusion at respiratory surface, circulation, diffusion at tissues, cellular respiration 3. Ventilation a. Movement of air/water thru a specialized gas-exchange organ (lung/gill) 4. Diffusion at respiratory surface a. Where o2 moves from air/water into blood & CO2 moves from the blood into air/water 5. Circulation a. Transport of dissolved O2 & CO2 throughout body by circulatory system 6. Diffusion at tissues a. Where O2 moves from blood into tissues & CO2 moves from tissues into blood 7. Cellular respiration a. Cell’s use of O2 and production of CO2. Leads to low O2 & high CO2 in tissues 8. Ficks law of diffusion equation? a. Rate of diffusion= k * A * (P2-P1)/D b. K= diffusion constant (depend on solubility of gas & temperature) c. A= area for gas exchange d. P2-P1= difference in partial pressure of gas on either side of barrier to diffusion e. D= distance (thickness of barrier to diffusion 9. To increase rate of diffusion… parameters of ficks law of diffusion equation a. Increase area for gas exchange, increase in difference of partial pressure of gas on either side of barrier to diffusion, decrease in thickness of barrier to diffusion,
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