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BIO 250

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BIO 250 The approximate partial pressure of oxygen at standard atmospheric pressure is about _____ mm Hg. a. 23 b. 160 c. 300 d. 590 - CORRECT ANSWER-ANS: B p848 If a person were skiing high u... p in the mountains, she might feel that she is having trouble breathing (getting enough oxygen in her blood). This is because the: a. thoracic cavity has a difficult time lowering the internal pressure below the lower atmospheric pressure. b. lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is less. c. lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is greater. d. physiological dead air space increases and atmospheric pressure decreases. - CORRECT ANSWER-ANS: B p849 Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture. a. inversely related to the concentration of that gas in the mixture and b. directly related to the concentration of that gas in the mixture and c. directly related to the concentration of that gas in the mixture and inversely related d. inversely related to the concentration of that gas in the mixture and directly related - CORRECT ANSWER-ANS: B p848 Which of the following helps determine the amount of oxygen that diffuses into the blood each minute? a. The total functional [Show More]

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