Which of the following constitutes total lung volume?
Residual volume and vital capacity
Tidal volume, inspiratory reserve volume, and expiratory reserve volume
Residual volume and tidal volume
Vital capacity and tidal volume
The Correct Answer is A
A. Residual volume and vital capacity: Total Lung Capacity (TLC) is the sum of every bit of air the lungs can hold. Vital capacity is the maximum air you can move, and residual volume is what remains after you exhale as hard as possible.
B. Tidal volume, inspiratory reserve volume, and expiratory reserve volume: This sum equals the vital capacity, but it misses the residual volume.
C. Residual volume and tidal volume: This is only a small portion of the total capacity.
D. Vital capacity and tidal volume: This is redundant, as tidal volume is already included within the calculation of vital capacity.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. tissue repair: The spleen can act as a site for monocytes that aid in tissue healing and immune response.
B. hematopoiesis: While primarily occurring in the bone marrow, the spleen performs hematopoiesis during fetal development and can resume it in adults under certain disease conditions.
C. red blood cell and platelet destruction: The spleen is often called the "red blood cell graveyard" because it filters out and breaks down old or damaged cells.
D. blood reservoir: The spleen can store a significant volume of blood (specifically platelets and RBCs) to be released into circulation if needed.
Correct Answer is C
Explanation
A. osteoclasts: These cells are responsible for the resorption (breakdown) of bone matrix.
B. osteons: These are structural units of compact bone, not individual cells.
C. osteoblasts: Osteoblasts are the cells that actively synthesize and secrete the organic components of the bone matrix.
D. osteocytes: These are mature bone cells that reside within the matrix to maintain it, but they no longer actively secrete it.
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