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?
Serotonin
GABA
Acetylcholine
Dopamine
Dopamine
The Correct Answer is B
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.
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Related Questions
Correct Answer is D
Explanation
Choice A rationale
This statement is incorrect. Nerves do not “go to sleep.”. Peripheral neuropathy in diabetes is caused by damage to the nerves as a result of high blood sugar levels over time.
Choice B rationale
This statement is incorrect. While nerve damage can occur due to various reasons, in the context of diabetes, it is primarily due to prolonged high blood sugar levels.
Choice C rationale
This statement is incorrect. Age and blood flow to the feet are not the primary causes of peripheral neuropathy in diabetes. The primary cause is prolonged high blood sugar levels.
Choice D rationale
This statement is correct. Prolonged high blood sugar levels in diabetes can cause damage to the peripheral nerves, leading to peripheral neuropathy.
Correct Answer is C
Explanation
Choice A rationale
A contrecoup injury is indeed a “true” injury. It occurs on the side of the brain opposite to the point of impact and can have severe consequences, including brain damage. Therefore, this statement is incorrect.
Choice B rationale
The severity and healing time of contrecoup injuries can vary greatly depending on the force and location of the impact, as well as individual health factors. It’s not accurate to say that contrecoup injuries are generally less severe and heal more quickly over time.
Choice C rationale
This statement is correct. A coup injury refers to the brain damage that occurs directly under the point of impact, while a contrecoup injury occurs on the opposite side of the brain from
where the head is struck. These injuries can occur separately or together, but if the blow is strong enough, they usually appear together.
Choice D rationale
The sequence of coup and contrecoup injuries is not as this choice describes. The coup injury happens at the point of impact, and the contrecoup injury happens when the brain rebounds and hits the opposite side of the skull. Both types of injuries can impact the brain’s blood supply.
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