If a person's brain has a low level of neurotransmitters how would this affect the person

This depends on the neurotransmitter deficiency. neurotransmitters are often decreased or imbalanced in the setting of mental health or psychiatric disorders as well as various neurologic disorders. for instance, the deficiency of the neurotransmitter dopamine is one of the main etiologic causes of parkinson's disease; the deficiency of the most abundant neurotransmitter acetylcholine will lead to body weakness similar to myasthenia gravis or lambert-eaton syndrome. in conclusion, the affectation of low levels of neurotransmitters depends on the neurotransmitter involved.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.