Question
A student injects adrenaline into an experimental animal and observes rapid heart rate increase. This shows adrenaline can act on:
Select an option. Your answer will be checked instantly.
Correct Answer: A. Target cells of the cardiovascular system
Explanation:
Adrenaline binds receptors on heart and blood vessel cells, producing rapid cardiovascular effects. Hormonal action depends on receptor-bearing target tissues.
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