How is regulation of blood phosphorus levels similar to that of calcium?
Like calcium concentrations, the concentration of blood phosphorus is regulated by calcitriol (vitamin D), PTH, and calcitonin. When blood phosphorus declines, calcitriol and PTH are released, and result in increased phosphorus absorption in the small intestine and phosphorus resorption from bones. When blood phosphorus is elevated, cacitonin will stimulate the bone-building activity of osteoblasts, which will take up phosphorus from blood; blood phosphorus levels will then return to normal.
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Drugs used to control blood ammonia levels in patients with hepatic encephalopathy are:
a. diuretics and chelating agents. b. corticosteroids and cimetidine. c. tetracycline and antacids. d. lactulose and neomycin.
Where is most of the fiber located in a kernel of wheat?
A. endosperm
B. bran
C. husk
D. germ
Circuit weight training promotes both cardiovascular health and muscular strength by moving rapidly from one exercise to the next.
Answer the following statement true (T) or false (F)
What is the chief risk factor for Alzheimer's disease?
a. Age b. Gender c. Low antioxidant intake d. Body weight after age 70