Experiment: Mice were injected with adrenaline and their blood pressure was measured every 10 minutes for an hour.Observation: Blood pressure spiked within 10 minutes and gradually normalized.Question: What physiological effect does adrenaline have?
Correct answer: B. Adrenaline causes a temporary increase in blood pressure.
- A. Adrenaline permanently lowers blood pressure.
- B. Adrenaline causes a temporary increase in blood pressure.
- C. Adrenaline has no cardiovascular effect.
- D. Adrenaline slows down the heart rate.
Explanation
The correct answer is Option B: Adrenaline causes a temporary increase in blood pressure. This is supported by the observation in the experiment where blood pressure spiked within 10 minutes of adrenaline injection and then gradually returned to normal levels. Option A is incorrect as the experiment did not show a permanent lowering of blood pressure. Option C is incorrect because the experiment clearly demonstrated a cardiovascular effect of adrenaline. Option D is incorrect as the experiment did not measure the heart rate but focused on blood pressure changes.
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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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