TEAS Science · Practice Question

    Respiratory system: TEAS Practice Question with Answer & Explanation

    An original TEAS 7-style science practice question, written for nursing-school applicants — with a full breakdown of every answer choice.

    Question

    Where does most gas exchange occur in the lungs?

    • A.Bronchi
    • B.Trachea
    • C.Alveoli
      Correct
    • D.Pleura

    Correct answer: C. Thin alveolar walls and surrounding capillaries permit rapid diffusion of oxygen and carbon dioxide.

    Why C is correct

    Thin alveolar walls and surrounding capillaries permit rapid diffusion of oxygen and carbon dioxide.

    How to solve this TEAS question

    Identify what the question is testing, eliminate choices that conflict with the relevant rule or evidence, and then select the option that directly answers the prompt.

    Review the alternatives

    The other choices do not satisfy the scientific fact, mathematical operation, language rule, or reading evidence tested by this question. Always compare each option with the exact wording of the prompt before deciding.

    Quick study tip: Link alveoli with diffusion and gas exchange.

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