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Fluid and Electrolytes 1
Topic Started: Sep 21 2015, 09:03 AM (120 Views)
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ST is a 58-year-old male who comes to your clinic and says that he’s been feeling nauseous and a lot thirstier than usual, and wants to know if his thirst might be because he’s been urinating excessively too. You decide to examine him further and learn the following:

Weight: 63 kg
[tooltip=SCr][/tooltip]: 1.2 mg/dL
[tooltip=Ca][/tooltip]: 13.4 mg/dL
PMD: Squamous cell lung cancer for the past 3 months
Allergies: NKDA
Current medications: Nivolumab 200mg

1. Which of the following statements involving calcium is true?
a. Calcium excretion through the kidneys decreases in the presence of Vitamin D and increases in the presence of PTH and calcitonin.
b. Vitamin D decreases excretion of calcium, while increasing excretion of phosphorous.
c. The majority of calcium in the body is stored in the bones, but in the presence of calcitonin, resorption increases and releases more calcium into the serum.
d. Absorption of calcium from the GI tract is mainly due to Vitamin D, which first needs to be activated by the kidneys into calcitriol.
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