Which of the following correctly describes the process of hearing?
Vibration of the eardrum is directly transmitted to the eighth cranial nerve, bypassing the inner ear structures.
Sound waves enter the ear canal and are converted to electrical impulses.
Vibration of the eardrum transmits through the bony ossicles to the perilymph in the inner ear, stimulating the eighth cranial nerve.
Sound is transmitted directly from the eardrum to the brain.
The Correct Answer is C
Choice A rationale
Vibration of the eardrum is not directly transmitted to the eighth cranial nerve, bypassing the inner ear structures. The vibrations from the eardrum are first transmitted through the ossicles (tiny bones in the middle ear) to the cochlea in the inner ear.
Choice B rationale
Sound waves enter the ear canal, but they are not directly converted to electrical impulses. The sound waves cause the eardrum to vibrate, and these vibrations are transmitted through the ossicles to the cochlea, where they are converted into electrical signals that are sent to the brain via the eighth cranial nerve.
Choice C rationale
Vibration of the eardrum transmits through the bony ossicles to the perilymph in the inner ear, stimulating the eighth cranial nerve. This is the correct description of the process of hearing.
Choice D rationale
Sound is not transmitted directly from the eardrum to the brain. The sound-induced vibrations of the eardrum are transmitted through the ossicles to the cochlea, where they are converted into electrical signals that are sent to the brain via the eighth cranial nerve.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
While gastric acid can cause dyspepsia, measuring gastric residual is not primarily done to remove gastric acid.
Choice B rationale
Measuring gastric residual is primarily done to identify delayed gastric emptying. This is important because delayed gastric emptying can lead to complications such as aspiration pneumonia.
Choice C rationale
Gastric residual does not directly determine the patient’s electrolyte balance.
Choice D rationale
While confirming the placement of the NG tube is important, it is not the primary purpose of measuring gastric residual.
Correct Answer is D
Explanation
Choice A rationale
Discarding the dressing in the bedside trash receptacle is not recommended because it can lead to the spread of infection. The dressing is contaminated with blood and purulent drainage, which are considered biohazardous waste.
Choice B rationale
Double-bagging the dressing in clear bags and labeling it “biohazard” is not sufficient. While it’s important to label biohazardous waste, the dressing should be disposed of in a designated biohazardous waste container.
Choice C rationale
Enclosing the dressing in a single clear plastic bag and discarding it in the bedside trash receptacle is also not recommended. This method does not provide adequate containment for biohazardous waste.
Choice D rationale
Disposing of the dressing in a biohazardous waste container is the correct method. This ensures that the biohazardous waste is properly contained and reduces the risk of spreading infection.
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