Q1. Carbonic anhydrase activity is primarily responsible for which of the following a. Low levels of freely diffused O2 in the plasma b. Low levels of

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Q1. Carbonic anhydrase activity is primarily responsible for which of the followinga. Low levels of freely diffused O2 in the plasmab. Low levels of freely diffused CO2 in the plasmac. Low levels of HCO3- in the plasmad. High levels of hemoglobin-bound O2 in blood erythrocytes

Q2. An increase in either temperature or salinity will cause _______ in the solubility of a gas in an aqueous solutiona. No changeb. An increasec. A decrease

Q3. Severing sensory feedback completely inhibits synchronized wing beating in the locust a. TRUEb. FALSEQ4. The PO2 in the alveoli is the same as the PO2 of air at sea level.a. TRUEb. FALSE

Q5. The O2 partial pressure of freshly oxygenated blood in the lungs is sufficient for near-saturation of hemoglobina. TRUEb. FALSE

Q6. The diffusion of molecules between gaseous and aqueous phases is primarily governed by a. Concentration gradientb. Electrochemical gradientc. Partial pressure gradientQ1. Carbonic anhydrase activity is primarily responsible for which of the followinga. Low levels of freely diffused O2 in the plasmab. Low levels of freely diffused CO2 in the plasmac. Low levels of HCO3- in the plasmad. High levels of hemoglobin-bound O2 in blood erythrocytes


Q3. Severing sensory feedback completely inhibits synchronized wing beating in the locust a. TRUEb. FALSE



Q3. Severing sensory feedback completely inhibits synchronized wing beating in the locust a. TRUEb. FALSE

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Q3. Severing sensory feedback completely inhibits synchronized wing beating in the locust a. TRUEb. FALSEQ28. Which of the following is NOT true of arteries a.They possess lumen valvesb.They are elasticc. They have thick smooth muscle wallsd. They are a key site of gas exchangee. b and df. a and d


Q30. Blood flow is more rapid down the central axis of a blood vessel than it is near the vessel wallsa. TRUEb. FALSE

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Q6. The diffusion of molecules between gaseous and aqueous phases is primarily governed by a. Concentration gradientb. Electrochemical gradientc. Partial pressure gradientQ4. The PO2 in the alveoli is the same as the PO2 of air at sea level.a. TRUEb. FALSE


Q6. The diffusion of molecules between gaseous and aqueous phases is primarily governed by a. Concentration gradientb. Electrochemical gradientc. Partial pressure gradient

Q4. The PO2 in the alveoli is the same as the PO2 of air at sea level.a. TRUEb. FALSE


Q6. The diffusion of molecules between gaseous and aqueous phases is primarily governed by a. Concentration gradientb. Electrochemical gradientc. Partial pressure gradient





Q6. The diffusion of molecules between gaseous and aqueous phases is primarily governed by a. Concentration gradientb. Electrochemical gradientc. Partial pressure gradientQ7. Gas transport across the fish gill involves which of the following processes?a. Cocurrent exchangeb. Tidal exchangec. Cross-current exchanged. Countercurrent exchange

Q8. In contrast to the Ideal Gas Law, Henrys Law take into account which property of a gas that is in contact with a liquid solution?a. Solubilityb. Partial pressure c. Concentration gradientd. Electrochemical potentialQ9. O2 in the air is transported to the alveoli primarily by a. Passive diffusionb. Active primary transportc. Convectiond. Conduction

Q10. Passive diffusion alone is sufficient for fish to obtain O2 from the surrounding water, convection is not required.a. TRUEb. FALSE Q7. Gas transport across the fish gill involves which of the following processes?a. Cocurrent exchangeb. Tidal exchangec. Cross-current exchanged. Countercurrent exchange

Q8. In contrast to the Ideal Gas Law, Henrys Law take into account which property of a gas that is in contact with a liquid solution?a. Solubilityb. Partial pressure c. Concentration gradientd. Electrochemical potential

Q7. Gas transport across the fish gill involves which of the following processes?a. Cocurrent exchangeb. Tidal exchangec. Cross-current exchanged. Countercurrent exchange

Q8. In contrast to the Ideal Gas Law, Henrys Law take into account which property of a gas that is in contact with a liquid solution?a. Solubilityb. Partial pressure c. Concentration gradientd. Electrochemical potential

PO2 = 21 KPaPO2 = 21 KPa[O2] = 8 mmol/l[O2] = 0.3 mmol/lQ7. Gas transport across the fish gill involves which of the following processes?a. Cocurrent exchangeb. Tidal exchangec. Cross-current exchanged. Countercurrent exchange


Q10. Passive diffusion alone is sufficient for fish to obtain O2 from the surrounding water, convection is not required.a. TRUEb. FALSE Q7. Gas transport across the fish gill involves which of the following processes?a. Cocurrent exchangeb. Tidal exchangec. Cross-current exchanged. Countercurrent exchange


Q10. Passive diffusion alone is sufficient for fish to obtain O2 from the surrounding water, convection is not required.a. TRUEb. FALSE Q9. O2 in the air is transported to the alveoli primarily by a. Passive diffusionb. Active primary transportc. Convectiond. Conduction

Q10. Passive diffusion alone is sufficient for fish to obtain O2 from the surrounding water, convection is not required.a. TRUEb. FALSE

Q11. Explain the difference between a sensory feedback-mediated rhythmic movement and a central pattern generator-mediated rhythmic movement.Q11. Explain the difference between a sensory feedback-mediated rhythmic movement and a central pattern generator-mediated rhythmic movement.Central pattern generatorsLocated entirely within the central nervous systemi.e. no peripheral afferent feedback requiredRhythm output to motor neurons generated by oscillatorsEither cells that produce timed spontaneous action potentials or networks of cells utilizing feedback inhibitionSensory feedback circuitsRequire peripheral afferent feedback to regulate motorneurons

Peripheral controlCentral controlQ12. Describe what is meant by the Bohr Effect. Why does it represent an advantageous adaptation with respect to gas exchange into and out of the bloodstream?Q12. Describe what is meant by the Bohr Effect. Why does it represent an advantageous adaptation with respect to gas exchange into and out of the bloodstream?Describes how O2 unloading from the blood is enhanced in tissues of high PCO2Two reasons:CO2 binding to hemoglobin reduces the latters affinity for O2CO2 is converted to carbonic acid by carbonic anhydrase, producing H+; H+ binding to hemoglobin also reduces O2 affinityAdvantageous because aerobically respiring tissues with a high O2 demand will tend to have higher CO2 levels

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Q1. Carbonic anhydrase activity is primarily responsible for which of the following a. Low levels of freely diffused O2 in the plasma b. Low levels of