Question

Many neurotransmitters are too large to cross the blood-brain barrier, so smaller molecules ​must be sought to alter brain biochemistry. To effect changes in brain activity in subjects ​with mood disorders due to deficits in serotonin, a strategy designed to increase the ​effective concentration of serotonin at serotonergic synapses must be used, including

a. blocking the receptors for competitive neurotransmitters.

b. consuming foods with higher levels of tyrosine.

c. inhibiting the enzyme that inactivates tryptophane.

d. inhibiting the mechanism facilitating serotonin re-uptake.

Answer 1

As , serotonin can't cross the blood brain barrier so to make up the serotonin , brain has to produces its serotonin.

As Tryptophan is the precursor of serotonin.

Enzymes which inactivates tryptophan if becomes inactivated then serotonin will be produced more in brain cells.

So answer will be option 3.

Thank you