Exam 4, FNDH 400 Dr. Lindshield, Practice Exams with complete solutions.

Exam 4, FNDH 400 Dr. Lindshield, Practice Exams with complete solutions. . Warfarin thins blood by decreasing the absorption of vitamin A. T F - correct answers.False Warfarin thins blood by decreasing the REGENERATION of VITAMINi K 25(OH)D is the active form of vitamin D, which is created by 25-hydroxylase in the kidney. T F - correct answers.False 25(OH)D is the CIRCULATING of vitamin D created by 25- Hydroxylase in the LIVER 1,25(OH)D2 binding to RXR increases the synthesis of calcitonin, which increases absorption of calcium. T F - correct answers.False 1,25(OH)2D binding to VDR increases the synthesis of CALBINDIN, which increases absorption of calcium In response to high iron levels, hephaestin is released from the enterocyte, which causes the degradation of ferritin, thereby decreasing iron excretion. T F - correct answers.False- In response to high iron levels. HEPCIDIN is released by the liver which causes the degredation of ferroportin, preventing the transportation of iron into circulation Fluoride decreases teeth's resistance to acid by replacing phosphate molecules in hydroxyapatite, forming fluorhydroxyapatite. T F - correct answers.False fluoride INCREASES teeth's resistance to acid by replacing phosphate molecules in hydroxyapatite forming fluorohydroxyapetite Phylloquinone, is the plant form of vitamin A that has an unsaturated tail, that is of varying length to multiple repeated units. T F - correct answers.False Phylloquinone, is the plant form of VITAMIN K that has an unsaturated tail, that is of varying length to multiple repeated units. Phytate is good source of bioavailable phosphorus, but binds to, and inhibits, the absorption of cobalamin and folic acid. T F - correct answers.False, phytate is not a good source of bioavailable phosphorus 8. Atrophic gastritis leads to a decrease in haptocorrin, which causes a decrease in the absorption of menaquinone. T F - correct answers.False- Atrophic gastritis leads to a decrease in INTRINSIC FACTOR, which causes a decrease in the absorption of menaquinone Vitamin D2 is produced by animals, has an additional double bond, and increases 25(OH)D levels more than vitamin D3 . T F - correct answers.False- VITAMIN D3 is produced by animals and DOES NOT have an additional double bond and increases 25(OH)D levels more than vitamin D2 Folic acid fortification was implemented because the neural tube closes early after conception when many women do not know they are pregnant, and the challenge in getting all women of reproductive age to take a supplement. T F - correct answers.True Name the micronutrient, which you learned about in this exam section, that if consumed at a high level it can make it difficult to diagnose the deficiency of another micronutrient (also name this micronutrient, 2 points). - correct answers.Folic acid/folate consumed at a high level can mask B12 deficiency Your friend is interested in having his/her blood vitamin D and A status measured. What forms of the vitamins would he/she have measured - correct answers.The circulating forms, for vitamin D 25(OH)D, or calcidiol and retinol for vitamin A. How are vitamin A and iron stored in the liver (4 points)? - correct answers.Vitamin A is stored in stellate cells as retinal esters, the storage form of vitamin A.