44. The partial pressure of oxygen in arterial bloods a. 40 b. 45 c. 50 d. 70 e.

Question

44. The partial pressure of oxygen in arterial bloods a. 40 b. 45 c. 50 d. 70 e.100 approxmately Most of the carbon dioxide in the blood is transponed as a. solute dissolved in the plasma. b. carbaminohemoglobin bicarbonate lons. d. solute dissolved in the cytoplasm of red blood cells. e. carbonic acid. a mixture of gases, the driving force for the movement of an individual gas within thart mixture is ultimately the a. solubility of the gas b. total pressure of the gases. c. fractional concentration of that gas d. partial pressure of that gas e. volume of the gas 47. Which statement best describes why O and CO, can both be exchanged simultaneoushy at the alveoli and pulmonary capillaries? a. Nitrogen is at a high pressure in both the alveoli and pulmonary capillaries and drive the exchange of O and CO2. b. Each gas acts independently and diffuses down its own partial pressure gradient c. Blood in the pulmonary capillaries is high in both O2 and CO d. Blood in the alveoli is high in both O2 and CO e. Blood in both the alveoli and pulmonary capillaries is at equilibrium. intense exercise, the metabolic activity of muscle causesin the part the movement of oxygen into the tissue. of oxygen in the tissue, a. no change: facilitating. b. a decrease :reducing c. a decrease: facilitating d. an increase : reducing e. an increase: facilitating

Explanation / Answer

Question 44

Answer is E

The partial pressure of oxygen in the artery is 100 mmHg.

Question 45

Answer is C

the most of the carbon dioxide is transported in the blood as bicarbonate ions(80%)

20% is transported in the blood as carbaminohemoglobin.

Question 46

Answer is D

the partial pressure of that gas.

The driving force for movement of gases between lungs and blood is due partial pressure. and the movement of gases between blood and tissue is also due to the partial pressure of that gas

Question 47.

Answer is B

Each gas acts independently and diffuses down its own partial pressure gradient.

The diffusion of gases occurs only due to the partial pressure differences of individual gases. so the gas diffuse from the high concentration of low concentration.

Question 48

Answer C

a decrease, facilitating

The increased exercise increases the oxygen utilization by the muscle that results in decreased partial pressure in muscle and facilitates oxygen movement into tissue

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