Humans Have Difficulty Obtaining Enough Oxygen While Breathing at High

question 68

Multiple Choice

Humans have difficulty obtaining enough oxygen while breathing at high elevations because _______ at low elevations.

• A) CO₂ makes up a higher percentage of the air than it does
• B) the temperature is lower than it is
• C) the barometric pressure is higher than it is
• D) the air is drier than it is
• E) the partial pressure of O₂ is lower than it is

---

Definitions:

Observer Drift

A phenomenon in research where there is a gradual shift in how observers interpret or code data over time, potentially affecting the reliability of the results.

Pygmalion Effect

The phenomenon in which higher expectations lead to an increase in performance.

Laboratory Observation

A research method in which subjects are observed in a controlled environment to gather data.

Naturalistic Observation

A research method involving observing subjects in their natural environment without interference.