A student nurse is reviewing for an upcoming final examination and recognizes in the ECG readings that the T wave represents which of the following?

Atrial depolarization.

Atrial repolarization.

Ventricular depolarization.

Ventricular repolarization.

Answer and Explanation

The Correct Answer is D

Choice A rationale

Atrial depolarization refers to the electrical activation of the atria, which is depicted by the P wave on an ECG, not the T wave. The P wave represents the contraction phase of the atria as it pumps blood into the ventricles. Therefore, this option is incorrect for the T wave.

Choice B rationale

Atrial repolarization is the process of the atria returning to their resting state. This repolarization is generally obscured by the QRS complex on an ECG and is not associated with the T wave. Thus, this answer choice is also incorrect.

Choice C rationale

Ventricular depolarization is represented by the QRS complex on an ECG. It indicates the ventricles are contracting to pump blood to the lungs and the rest of the body. Therefore, it does not correlate with the T wave.

Choice D rationale

Ventricular repolarization is indicated by the T wave on an ECG. This phase signifies the ventricles returning to their resting state after the contraction. It is the correct answer as it accurately reflects the T wave's function.

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Correct Answer is C

Explanation

Choice A rationale

Fibrocystic lesions in the breast are benign changes that involve the formation of cysts and fibrous tissue. These do not typically cause an orange-peel appearance of the skin.

Choice B rationale

A normal finding of the breast would not include an orange-peel or "peau d'orange" appearance, as this is considered an abnormal change often associated with underlying pathology.

Choice C rationale

Carcinoma of the breast can lead to an orange-peel appearance of the skin due to lymphatic obstruction. This dimpling effect is caused by the cancerous infiltration and thickening of the skin, making this the correct answer.

Choice D rationale

Fibroadenoma is a benign tumor of the breast and does not usually cause the skin changes described as orange-peel appearance. This condition is generally not associated with skin texture changes.

A. Romberg test. B. Weber test. C. Rinne test. D. Cover test.

Correct Answer is A

Explanation

Choice A rationale

The Romberg test evaluates equilibrium by having the client stand with feet together and eyes closed, observing for swaying or imbalance. It assesses the function of the vestibular system, proprioception, and cerebellar function, making it the most appropriate test for assessing dizziness and equilibrium.

Choice B rationale

The Weber test involves placing a tuning fork on the forehead to evaluate sound lateralization. It assesses hearing loss but not equilibrium, making it less suitable for dizziness assessment.

Choice C rationale

The Rinne test compares air and bone conduction of sound using a tuning fork. While useful for diagnosing conductive hearing loss, it does not assess equilibrium, making it inappropriate for evaluating dizziness.

Choice D rationale

The cover test evaluates eye alignment and muscle function by having the client cover one eye and observe the uncovered eye for movement. It assesses ocular motility but not equilibrium, making it unsuitable for dizziness assessment.

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A student nurse is reviewing for an upcoming final examination and recognizes in the ECG readings that the T wave represents which of the following?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is A

Explanation

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