A group of nursing students are studying the conduction system of the heart. The nursing students should recognize that the pacemaker of the heart is known as
The Correct Answer is {"dropdown-group-1":"C"}
The pacemaker of the heart is known as the sinoatrial (SA) node. The SA node is a specialized group of cells located in the right atrium of the heart. It generates electrical impulses that initiate each heartbeat and set the rhythm for the entire heart.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Bronchovesicular breath sounds and normal in that location:
Bronchovesicular breath sounds are medium-pitched sounds heard over the major bronchi and are usually equal on inspiration and expiration. They are typically heard in the 1st and 2nd intercostal spaces anteriorly and between the scapulae posteriorly. While they might be normal in certain locations, hearing them over peripheral lung fields might indicate an abnormality.
B. Normally auscultated over the trachea:
This statement doesn't specify a particular type of breath sound. Tracheal breath sounds are harsh and relatively high-pitched, heard directly over the trachea. They are normal over the trachea but are not normally heard in the lung periphery.
C. Vesicular breath sounds and normal in that location:
Vesicular breath sounds are low-pitched, soft sounds heard over most of the lungs during inspiration. They are longer on inspiration than expiration and are considered normal breath sounds heard in the peripheral lung fields. Hearing vesicular sounds in the posterior lower lobes is typical and indicates normal lung function.
D. Bronchial breath sounds and normal in that location:
Bronchial breath sounds are high-pitched and loud, heard primarily over the trachea and larynx. If heard in the peripheral lung fields, especially in the lower lobes, it can suggest an abnormality such as consolidation or compression of lung tissue.
Correct Answer is A
Explanation
A. The location of most breast tumors: This choice is correct. The upper outer quadrant of the breast is the most common site for breast tumors. This area has a higher concentration of glandular tissue, making it more susceptible to the development of tumors. Therefore, thorough examination of this area is crucial during breast examinations.
B. More prone to Injury and calcifications than other locations in the breast: While injuries can occur in any part of the breast, the statement about calcifications is not accurate. Calcifications in breast tissue can occur in various areas and are not specific to the upper outer quadrant.
C. The largest quadrant of the breast: This statement is not accurate. The breast quadrants are not distinguished by size; they are anatomical divisions used for reference during breast examinations. Each quadrant has its significance for examination purposes, but none is considered the largest.
D. Where most of the suspensory ligaments attach: The suspensory ligaments, also known as Cooper's ligaments, provide structural support to the breast tissue. While they are essential for breast anatomy, they are not concentrated in the upper outer quadrant exclusively. These ligaments are distributed throughout the breast tissue.
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