A nurse is teaching a client about the nervous system.
Which of the following neurotransmitters should the nurse include in the teaching as having an inhibitory action?

Choice A rationale

Respiratory therapy is primarily concerned with the treatment and management of a patient’s breathing. While swallowing difficulties can potentially lead to respiratory issues such as aspiration pneumonia, the primary role of evaluating and treating swallowing difficulties falls outside the scope of respiratory therapy.
Choice B rationale
Nutritional therapy would be involved in managing the dietary needs of a patient with Parkinson’s disease, including modifications to food texture and liquid consistency if swallowing difficulties are present. However, the evaluation and treatment of the swallowing difficulty itself would be managed by a speech therapist.
Choice C rationale
Occupational therapy could assist with adaptations to enhance the patient’s feeding skills and independence during meals. However, the specific evaluation and treatment of swallowing function is typically within the scope of a speech therapist.
Choice D rationale
Speech therapists, or speech-language pathologists, are the professionals specifically trained to evaluate and treat individuals with speech, language, voice, and swallowing disorders. This would include a patient with Parkinson’s disease experiencing difficulty swallowing.

Choice A rationale
Serotonin is indeed an inhibitory neurotransmitter. It helps regulate mood, appetite, and sleep among other things. However, its role in the nervous system is complex and it can also have excitatory effects depending on the specific receptors and neural pathways involved.
Choice B rationale
Gamma-aminobutyric acid (GABA) is the primary inhibitory neurotransmitter in the brain. It works by decreasing neuronal excitability, which helps to regulate muscle tone, among other functions.
Choice C rationale
Acetylcholine is primarily an excitatory neurotransmitter, although it can have inhibitory effects in certain parts of the nervous system. It plays a key role in muscle activation, learning, and memory.
Choice D rationale
Dopamine can act as both an inhibitory and an excitatory neurotransmitter, depending on the type of receptor it binds to and the specific neural pathway involved. It plays key roles in reward, motivation, and motor control.