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.

Answer and Explanation

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.

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Correct Answer is C

Explanation

Choice A rationale

While a patient’s medication history can impact wound healing, in this case, there is no specific information provided about the patient’s medications that would suggest a delay in wound healing.

Choice B rationale

Although the patient’s cholesterol level is elevated, hyperlipidemia is not typically associated with delayed wound healing.

Choice C rationale

Prealbumin is a marker of nutritional status. A low prealbumin level, like in this patient, could indicate malnutrition, which can delay wound healing. Adequate nutrition is essential for wound healing as it provides the necessary building blocks for tissue repair.

Choice D rationale

The patient’s fasting glucose level is within the normal range, so it is unlikely to impact wound healing. While poorly controlled diabetes can delay wound healing, this patient’s diabetes appears to be well-controlled.

A. 0.9% sodium chloride. B. Dextrose 10% in water. C. 3% sodium chloride. D. Lactated Ringer’s.

Correct Answer is B

Explanation

Choice A rationale

0.9% sodium chloride, also known as normal saline, is an isotonic solution that is commonly used for hydration and to replace lost fluids. However, it does not provide any calories or nutrients, which are necessary for patients receiving TPN1.

Choice B rationale

Dextrose 10% in water (D10W) is the recommended solution to administer until the next TPN solution is available. This is a hypertonic fluid that provides dextrose to the patient, helping to maintain their blood glucose levels and reducing the risk of hypoglycemia.

Choice C rationale

3% sodium chloride is a hypertonic saline solution that is typically used to treat patients with severe hyponatremia (low sodium levels). It is not suitable as a replacement for TPN as it does not provide the necessary nutrients and can lead to hypernatremia (high sodium levels) if used inappropriately.

Choice D rationale

Lactated Ringer’s solution is an isotonic solution that is commonly used for fluid resuscitation in patients with significant fluid loss. While it does contain multiple electrolytes that mimic those found in plasma, it does not provide any calories or nutrients, making it unsuitable as a replacement for TPN1.

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Which of the following correctly describes the process of hearing?

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Naxlex Comprehensive Predictor Exams

Correct Answer is C

Explanation

A nurse is about to replace a nearly depleted container of total parenteral nutrition (TPN) for a patient, but discovers a delay in the delivery of the new TPN solution from the pharmacy. Which solution should the nurse administer until the next TPN solution is available?

Correct Answer is B

Explanation

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