Experiment: A lab tested the impact of smoking on lung cilia by exposing cultured airway cells to cigarette smoke daily for a week.Observation: Smoke-exposed cells showed reduced cilia movement and structural damage.Question: What does this experiment show?
Correct answer: C. Smoking impairs cilia function and may reduce airway cleaning ability.
- A. Smoke improves cellular motion by stimulating cilia.
- B. Cilia regenerate rapidly in smoky conditions.
- C. Smoking impairs cilia function and may reduce airway cleaning ability.
- D. Smoke increases lung oxygen exchange rate.
Explanation
The correct answer is option C: Smoking impairs cilia function and may reduce airway cleaning ability. The experiment demonstrated that exposure to cigarette smoke led to reduced cilia movement and structural damage in airway cells, indicating that smoking impairs cilia function. This impairment can hinder the airway's ability to effectively clean itself, potentially leading to respiratory issues. The other options are incorrect as they do not align with the observed effects of smoking on cilia in the experiment.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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