What component of the conduction system is referred to as the pacemaker of the heart?

Atrioventricular (AV) node

Bundle branches

Bundle of His

Sinoatrial (SA) node

Answer and Explanation

The Correct Answer is D

A.   Atrioventricular (AV) node: The AV node conducts electrical signals from the atria to the ventricles, but it is not the pacemaker of the heart.
B.   Bundle branches: The bundle branches transmit the electrical impulses to the ventricles but are not the primary pacemaker.
C.   Bundle of His: The Bundle of His conducts electrical signals from the AV node to the bundle branches and ventricles but does not act as the pacemaker.
D.   Sinoatrial (SA) node: The SA node, located in the right atrium, is the primary pacemaker of the heart, initiating electrical impulses that regulate heart rhythm.

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Correct Answer is A

Explanation

A. Ulcer refers to a wound with a loss of epidermis and dermis, often irregular and deeper, potentially bleeding.
B. Erosion involves a shallow loss of the epidermis only, not extending into the dermis.
C. Nodule is a solid, raised lesion that is typically firm and not ulcerated.
D. Cyst is a sac-like structure containing fluid or semi-solid material, not a wound with loss of tissue.

A. Tactile fremitus B. Crepitus. C. Adventitious sounds. D. Friction rub

Correct Answer is B

Explanation

A. This is a vibration felt on the chest wall when a patient speaks, often used to assess lung sounds. It is not associated with the crackling sensation described here.
B. The coarse, crackling sensation felt on the skin surface when palpating is crepitus, which occurs when air escapes into the subcutaneous tissue, often due to trauma, infection, or the presence of a pneumothorax.
C. These are abnormal lung sounds, such as crackles, wheezes, or rhonchi, heard with a stethoscope during auscultation, not felt on the chest wall during palpation.
D. A friction rub is a grating or scraping sound heard with a stethoscope, typically due to inflammation of the pleural surfaces. It is not a sensation felt on the chest wall.

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What component of the conduction system is referred to as the pacemaker of the heart?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse is assessing a lesion on a patient and observes a focal loss of epidermis and dermis, a depression extending into the dermis, irregularly shaped, and bleeding. This type of wound is known as a/an

Correct Answer is A

Explanation

During palpation of the anterior chest wall, the nurse notices a coarse, crackling sensation over the skin surface. On the basis of these findings, the nurse suspects:

Correct Answer is B

Explanation

A nurse in an emergency department (ED) is admitting a client. Exhibits Select 4 findings in the client's medical record that place them at risk for pneumonia.

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