The apex of the heart is found ______ of the midline of the body.
in the center
to the right
to the left
The Correct Answer is C
A. In the center: The heart is not located in the exact midline of the body. Its position is slightly rotated, so the apex does not lie at the center.
B. To the right: The apex of the heart points away from the right side. Most of the right heart structures are positioned more medially and anteriorly.
C. To the left: The apex of the heart points downward, forward, and to the left, typically at the level of the 5th intercostal space in line with the midclavicular line. This leftward orientation is why the apex beat is most easily palpated on the left side of the chest.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Squamous alveolar cells:Squamous alveolar cells (type I pneumocytes) form the thin lining of alveoli to facilitate gas exchange. They do not produce mucus and are not involved in air cleansing.
B. Goblet cells:Goblet cells are specialized epithelial cells found in the respiratory tract that secrete mucus. This mucus traps dust, pathogens, and other particles in inhaled air, playing a critical role in respiratory defense.
C. Great alveolar cells:Great alveolar cells (type II pneumocytes) secrete pulmonary surfactant to reduce alveolar surface tension. They do not produce mucus or participate directly in cleansing inhaled air.
D. Ciliated cells:Ciliated epithelial cells help move mucus along the respiratory tract through coordinated beating of cilia, but they do not secrete mucus themselves.
E. The pleurae:The pleurae are membranes surrounding the lungs and lining the thoracic cavity. They produce pleural fluid to reduce friction during breathing but do not produce mucus.
Correct Answer is ["prolactin"]
Explanation
The image illustrates the hypothalamic-pituitary-endocrine organ axis. Letter Apoints to the mammary gland (breast tissue), which is the target organ for milk production. The hormone at A is Prolactin (PRL). The hormone pathway originates from the pituitary gland. The line labeled Apoints directly to the mammary gland. The hormone responsible for stimulating milk production in the mammary glands is Prolactin (PRL), which is secreted by the anterior pituitary gland.
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