The diagram shows a synapse. Heroin affects neuron. Which labelled part does the heroin directly affect?
Correct answer: B. B
- A. A
- B. B
- C. C
- D. D
Explanation
Label B is correct. Heroin typically affects the release of neurotransmitters such as dopamine in the synaptic cleft, altering the normal functioning of the synapse.
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About Receptors
Receptors are specialized cells or proteins that detect stimuli such as light, sound, pressure, temperature and chemicals, then initiate responses through sensory or hormonal pathways. Questions distinguish sensory receptors from effectors, compare receptor types, and examine stimulus conversion into nerve impulses, including the roles of rods, cones, chemoreceptors and mechanoreceptors.
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