What triggers the afferent pathways, resulting in the sensation of pain?
Spinal cord
Nociceptors
Endorphins
Cortex
The Correct Answer is B
Choice A rationale:
The spinal cord plays a crucial role in pain transmission, but it does not initiate the afferent pathways. It receives pain signals from nociceptors and relays them to the brain for processing.
The spinal cord is also involved in pain modulation, as it can dampen or amplify pain signals depending on various factors. However, it is not the primary trigger for pain sensation. That role belongs to nociceptors.
Choice B rationale:
Nociceptors are specialized sensory receptors that detect potentially damaging stimuli, such as intense heat, pressure, or chemical irritants.
They are located throughout the body, including the skin, muscles, joints, and internal organs.
When nociceptors are activated, they generate electrical signals that travel along nerve fibers to the spinal cord and brain. This process initiates the afferent pathways, which ultimately lead to the conscious perception of pain.
Nociceptors are essential for protecting the body from harm. They alert us to potential dangers and trigger responses that help us avoid injury or further damage.
Choice C rationale:
Endorphins are natural pain-relieving substances produced by the body. They act on receptors in the brain and spinal cord to reduce pain perception.
However, endorphins do not trigger the afferent pathways. They work by modulating pain signals that have already been initiated by nociceptors.
Choice D rationale:
The cortex is the outer layer of the brain that is responsible for higher-level functions, such as thinking, feeling, and decision- making.
It plays a role in the conscious experience of pain, but it does not trigger the afferent pathways.
The cortex receives pain signals from the spinal cord and processes them, leading to the awareness of pain.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale for Choice A: Obtain vital signs
While obtaining vital signs is important in assessing a patient's overall condition, it is not the first priority in a suspected transfusion reaction.
Vital signs can provide valuable information about the severity of the reaction, but they should not delay the immediate action of stopping the transfusion.
Delaying the cessation of the transfusion could allow for further infusion of incompatible blood or allergens, potentially worsening the reaction and leading to more serious complications.
Rationale for Choice B: Notify the registered nurse
Involving other healthcare professionals is crucial in managing transfusion reactions, but it should not precede stopping the transfusion.
The nurse should prioritize stopping the transfusion to prevent further exposure to potential triggers and then promptly notify the registered nurse for further assessment and interventions.
Timely communication with the registered nurse is essential for coordinating care and ensuring appropriate treatment measures are implemented.
Rationale for Choice C: Administer diphenhydramine
Diphenhydramine, an antihistamine, can be used to treat allergic reactions, but it should not be administered as the first response in this scenario.
The priority is to halt the infusion of the blood product that is potentially causing the reaction.
Administering diphenhydramine before stopping the transfusion could mask the symptoms of the reaction, making it more difficult to assess its severity and progression.
Rationale for Choice D: Stop the transfusion
This is the correct and most immediate action to take when a patient develops itching and hives during a blood transfusion.
These symptoms are indicative of a possible allergic or transfusion reaction, and stopping the transfusion is essential to prevent further complications.
It's critical to act quickly to minimize the amount of incompatible blood or allergens that enter the patient's circulation.
By stopping the transfusion, the nurse can potentially prevent the reaction from worsening and safeguard the patient's well- being.
Correct Answer is C
Explanation
Choice A rationale:
Recapping needles is a dangerous practice that significantly increases the risk of needlestick injuries.
The act of recapping involves directing the sharp end of the needle towards one's hand, creating a high likelihood of accidental puncture.
Even experienced healthcare professionals are susceptible to needlestick injuries during recapping.
Wastebaskets are not designed for the safe disposal of sharps and can easily be punctured, leading to potential exposure to bloodborne pathogens.
Choice B rationale:
While it is true that needles should not be recapped on ABG specimens, this option does not address the broader issue of safe needle disposal in general.
Focusing solely on ABG specimens could lead to the misconception that recapping is acceptable for other types of needles.
Choice D rationale:
Breaking needles in half is not recommended as a standard practice for needle disposal.
This action can create sharp fragments that are difficult to handle and can still cause injuries.
Sharps disposal containers are designed to safely contain intact needles and should be used as the primary method of disposal.
Choice C rationale:
Placing uncapped needles directly into a puncture-proof container is the safest and most recommended practice for needle disposal.
These containers are specifically designed to prevent needlestick injuries by shielding the sharps from accidental contact. They are typically made of hard plastic or metal and are clearly labeled for biohazard waste.
Using puncture-proof containers consistently for all needle disposal significantly reduces the risk of needlestick injuries among healthcare workers.
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