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 B
Explanation
Choice A rationale
Troponin is a cardiac enzyme which indicates a client has experienced a myocardial infarction. It is not a laboratory test that supports a diagnosis of malnutrition.
Choice B rationale
Albumin is a measure of plasma proteins which reflects the nutritional condition of a client experiencing anorexia and malnutrition over an extended period of time. Therefore, a nurse
should expect altered albumin levels in a client who reports anorexia and is experiencing malnutrition.
Choice C rationale
Total bilirubin is altered in clients who are experiencing hepatobiliary disease. It is not a laboratory test that supports a diagnosis of malnutrition.
Choice D rationale
Creatine kinase is a cardiac enzyme which is useful in the diagnosis of a myocardial infarction. It is not a laboratory test that supports a diagnosis of malnutrition.
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