Nutr 202 Exam 3 questions with correct answers

Describe the differences between macrominerals and microminerals. CORRECT ANSWER Macrominerals are present in larger amounts in the body, the recommended intake is more than 100 mg per day, and some examples are calcium, phosphorous, potassium, sulfur, sodium, chloride, and magnesium. Microminerals intake is less than 100 mg per day, and some examples are iron, copper, manganese, and iodine. Describe the process of blood calcium regulation when blood calcium becomes low. CORRECT ANSWER PTH release increases, which triggers the conversion of Vitamin D to active form, calcitriol. Calcitriol increases calcium absorption in the intestine, Calcitriol and PTH increased calcium re absorption in the kidney, and Calcitriol and PTH release calcium from the bones. What are the functions of calcium in the body? CORRECT ANSWER - building and maintenance in the bone and makes up the crystal, hydroxyzpatite, which provides bone strength. -It intiates muscle contraction and allows release of neurotransmitters in the conduction of nerve impulses. -Along with Vitamin D, it helps with simultaneous break down and rebuilding of the bone and enables adaptations to physical changes. -Hormone regulation: the hormone's impact on a cell may be mediated by hormone's effect on cellular calcium levels. Amplifies hormone messenger because it is the second messenger. -Needed to convert prothrombin to thrombin. -Has protective effect against hypetension Blood levels tightly regulated wit