Question

Prozac, among many other drugs, functions by altering neurotransmitter levels in the brain. How does Prozac work?

A. By making serotonin-gated channel easier to open
B. By increasing the amount of serotonin released from the presynaptic neuron, increasing the amount available in the synapses that use it
C. By blocking the reuptake of serotonin after it has been released, increasing the amount available in the synapses that use it
D. By decreasing the amount of serotonin released from the presynaptic neuron, decreasing the amount available in the synapses that use it

Answer 1

Prozac works by blocking the reuptake of serotonin into the presynaptic neuron, thus increasing serotonin in the synaptic cleft and acting as a serotonin agonist. The correct option is C.

Step-by-step explanation:

Prozac, a widely known antidepressant medication, functions as a selective serotonin reuptake inhibitor (SSRI). By blocking the reuptake of serotonin into the presynaptic neuron, it effectively increases the concentration of serotonin available in the synaptic cleft.

This elevation of serotonin levels can improve communication between neurons, which is thought to have a positive effect on mood and can help alleviate symptoms of depression. Answering the student's original question: Prozac works by option C.

By blocking the reuptake of serotonin after it has been released, increasing the amount available in the synapses that use it. As for being an agonist or an antagonist for serotonin, Prozac is considered to be a serotonin agonist because it increases the active levels of serotonin in the synaptic cleft.