Which hormone is secreted in response to low levels of calcium in the bloodstream?
Thyroid hormone
Parathyroid hormone
Calcitonin
Vasopressin
The Correct Answer is B
Parathyroid hormone (PTH) is a hormone produced by the parathyroid glands, which are located behind the thyroid gland in the neck. PTH regulates the calcium levels in the blood by stimulating the release of calcium from the bones, increasing the absorption of calcium from the intestines, and decreasing the excretion of calcium from the kidneys. When the calcium levels in the blood are low, PTH is secreted to raise them back to normal.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rhabdomyolysis is a condition that occurs when skeletal muscle tissue breaks down rapidly due to injury, infection, drug toxicity, or other causes. The breakdown of muscle releases myoglobin, a protein that carries oxygen in muscle cells, into the bloodstream. Myoglobin can damage the kidneys by clogging the renal tubules and causing acute kidney injury. Rhabdomyolysis can also cause electrolyte imbalances, muscle weakness, and compartment syndrome.
Correct Answer is D
Explanation
Alzheimer disease is a progressive neurodegenerative disorder that affects memory, cognition, behavior, and daily functioning. Alzheimer disease is characterized by the accumulation of amyloid-beta plaques and neurofibrillary tangles in the brain, which impair the communication and survival of neurons. Alzheimer disease is influenced by genetic and environmental factors, and some rare forms of the disease are caused by mutations in specific genes.
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