If a drug prevents the chemical messenger at a synapse from breaking down, what may happen?
Answer and explanation
Correct answer: Excitation in the next neuron may last longer
Chemical messengers released at a synapse stimulate receptors on the next neuron. Normally, removal or breakdown of the messenger helps terminate the signal and prevents continuous stimulation. If a drug blocks its breakdown, the messenger can remain active for longer, so excitation in the next neuron may be prolonged. Option A is correct. The other options describe effects that do not follow synaptic physiology and confuse neural, sensory or endocrine functions.
Frequently asked questions
What is the correct answer to this question?
Excitation in the next neuron may last longer
Why is this the correct answer?
Chemical messengers released at a synapse stimulate receptors on the next neuron. Normally, removal or breakdown of the messenger helps terminate the signal and prevents continuous stimulation. If a drug blocks its breakdown, the messenger can remain active for longer, so excitation in the next neuron may be prolonged. Option A is correct. The other options describe effects that do not follow synaptic physiology and confuse neural, sensory or endocrine functions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
