An imbalance in bone remodeling characteristic of osteoporosis is caused by:
Enhanced bone formation caused by increased activity of osteoclasts
Increased bone resorption caused by increased activity of osteoblasts
Enhanced bone formation caused by increased activity of osteoblasts
Increased bone resorption caused by increased activity of osteoclasts
The Correct Answer is D
A. Osteoclasts are responsible for bone resorption, not formation. Increased osteoclast activity leads to excessive bone breakdown, not enhanced formation.
B. Osteoblasts are responsible for bone formation. In osteoporosis, osteoblast activity is not increased; rather, it is osteoclast activity that is dysregulated, leading to bone loss.
C. Enhanced bone formation is typically seen in conditions like osteopetrosis or during bone healing. Osteoporosis is characterized by an imbalance in favor of bone resorption, not formation.
D. Osteoporosis is characterized by increased bone resorption, which is primarily driven by osteoclast activity. This leads to a decrease in bone density and an increased risk of fractures.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Atherosclerosis, the buildup of fatty plaques in the arteries, is a common cause of death in patients with progeria. These patients experience accelerated aging, which leads to early development of cardiovascular diseases, including atherosclerosis, which contributes to their early mortality.
B. Psychosis is not typically associated with progeria. The condition primarily affects physical aging processes rather than causing psychiatric symptoms like psychosis.
C. While rapid aging is the hallmark of progeria, it is not the direct cause of death. Instead, it leads to the development of age-related diseases like cardiovascular issues, which are the main contributors to mortality.
D. Scleroderma is a condition involving the hardening of the skin and connective tissues, but it is not a direct cause of death in progeria. The primary cause of death is related to cardiovascular complications such as atherosclerosis.
Correct Answer is B
Explanation
A. Metabolic acidosis is characterized by a low pH and a decrease in bicarbonate, but it is not typically associated with hypokalemia. In fact, acidosis may cause potassium to shift out of cells, increasing serum potassium levels.
B. Metabolic alkalosis is often associated with hypokalemia because the body compensates for alkalosis by shifting potassium into cells, leading to a lower serum potassium level. This is commonly seen with conditions like vomiting or the overuse of diuretics.
C. Hyperchloremia refers to elevated chloride levels, which may be associated with metabolic acidosis, but it is not directly linked to hypokalemia.
D. "None of the above" is incorrect because metabolic alkalosis is a known condition associated with hypokalemia.
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