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A dissociation curve for hemoglobin and adaptation to living where air is “thin”. The curve showing the percentage of saturation (the amount of O2 bound to hemoglobin) at increasing values of P02. Partial pressure reflects the relative amount of gas in a mixture and is measured in millimeters of mercury 9mmHg). Llamas are native to the Andes Mountains in South America. The partial pressure of O2 in the atmosphere where live is about half of the PO2 at sea level. As a result, the PO2 in the lungs of llamas is about 50mm Hg, whereas that in human lungs at sea level is about 100mm Hg.
Concept introduction:
The hemoglobin pigment act as a vehicle for transport of oxygen in blood. The oxygen-hemoglobin dissociative curve is a curve that shows the percentage of saturated hemoglobin on the y- axis and succeeding oxygen tension on the x-axis. This curve helps in understanding the carrying and release of oxygen by blood.
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Campbell Biology & Valuepack Access Card Pkg
- Gas moves from an area of ________ partial pressure to an area of ________ partial pressure. low; high low; low high; high high; lowarrow_forwardA partial pressure gradient of oxygen exists between ________. a. air and lungs b. lungs and metabolically active tissues c. air at sea level and air at high altitudes d. all of the abovearrow_forwardIf an individual fully inhales to a total lung capacity of 4.5 L at sea level (760 mm Hg) and dives to a depth of 66 feet, the lungs will be compressed to about A. 1.0 L B. 1.5 L C. 2.0 L D. 2.5 Larrow_forward
- What are some advantages of gas exchange in air over gas exchange in water?arrow_forwardThe barometric pressure is about half the sea-level value of 760 mm Hg at an altitude of 4,000-5,000 feet 9,000-10,000 feet 14,000-15000 feet 18,000-19,000 feetarrow_forwardExplain what a partial pressure gradient is and how such gradients figure in gas exchange.arrow_forward
- In a _______, air flows continually across the respiratory surface. a. fish b. bird c. frog d. mammalarrow_forward3. At sea level, a diver has the following: • Lung volume: 6 L • Pressure within the lungs: 755 mm Hg If this individual dives to a depth of 99 feet and compresses the lung volume to 2 L, what will be the pressure within the diver's lungs? A. 960 mm Hg B. 1420 mm Hg C. 1765 mm Hg D. 2265 mm Hgarrow_forward
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