Human Lungs Have Evolved to Breathe Oxygen at a Pressure

question 9

Multiple Choice

Human lungs have evolved to breathe oxygen at a pressure as that in the atmosphere,0.21 atm.If a particular heliox mixture to be carried by a scuba diver is at a pressure of 7.00 atm,what should be the partial pressure due to helium in order to maintain the pressure due to oxygen at 0.21 atm?

• A)0.21 atm
• B)7.00 atm
• C)6.79 atm
• D)7.21 atm
• E)none of the above

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Definitions:

Sociocultural-graded Influences

Factors that affect an individual's development and behavior, based on the cultural, social, and economic contexts in which they are raised.

History-graded Influences

events and experiences that affect a particular generation or cohort, such as wars, economic changes, and technological advancements.

Age-graded Influences

Social and cultural factors that impact individuals differently depending on their age, often structuring experiences and expectations throughout the life course.

Non-normative Life Event Influences

Pertains to unique life events that occur unpredictably and aren't common to all individuals, significantly impacting one's life trajectory differently from societal norms.