Exam 4 Units 7 and 8-Regular Review of attempt 1 Started on Friday, April 20, 2012, 12:56 PM Completed on Friday, April 20, 2012, 01:23 PM Time taken 26 mins 59 secs Marks 140/150 Grade 280 out of a maximum of 300 (93%) Question 1 Marks: 1 The LD50 of niacin administered to mice, orally is _________ g/kg: Choose one answer. a. 1.0 b. 5.3 c. 4.5 d. 9.0 Correct Marks for this submission: 1/1. Question 2 Marks: 1 Minerals chelated to amino acids or organic acids such as fumarate or malate are more bioavailable because the readily absorbed amino acids and organic acids carry the bound mineral into the enterocyte with them as they are absorbed: Answer: True False Correct Marks for this submission: 1/1. Question 3 Marks: 1 K+levels in the blood are not important for maintaining normal nerve transmission and muscle contraction: Answer: True False Correct Marks for this submission: 1/1. Question 4 Marks: 1 Phytic acid binds and makes unavailable for absorption: Choose one answer. a. Ca b. Fec. Zn d. all of the answers are correct Correct Marks for this submission: 1/1. Question 5 Marks: 1 What is the symptom of Mn deficiency in chickens? Choose one answer. a. soft claws b. ataxia c. perosis d. flushing Correct Marks for this submission: 1/1. Question 6 Marks: 1 The incidence of grass tetany is higher in the spring than any other season, for sheep, because: Choose one answer. a. forages are high in Mg and high in K b. forages are low in K and high in Mg c. forages are low in Mg and high in K d. forages are low in Mg and low in K Correct Marks for this submission: 1/1. Question 7 Marks: 1 Zinc is bound and stored by the protein: Choose one answer. a. ferritin b. metallothionein c. hemoglobin d. myoglobin Correct Marks for this submission: 1/1.Question 8 Marks: 1 The bioavailability of transition metals is especially increased by chelation. Answer: True False Correct Marks for this submission: 1/1. Question 9 Marks: 1 Vitamin B6 induced neuropathy in humans is reversible upon discontinuation of administration of the vitamin: Answer: True False Correct Marks for this submission: 1/1. Question 10 Marks: 1 One of the most common, and least serious, of vitamin C toxicity in humans is: Choose one answer. a. gout b. gastrointestinal complaints (diarrhea) c. anemia d. none of the answers are correct Correct Marks for this submission: 1/1. Question 11 Marks: 1 Water soluble vitamins can be synthesized by the microflora of the gastrointestinal tract: Answer: True False Correct Marks for this submission: 1/1. Question 12 Marks: 1 Mg seems to play a role in protection against heart disease and hypertension: Answer: True False Correct Marks for this submission: 1/1. Question 13 Marks: 1 Cr+++ participates in carbohydrate and lipid metabolism: Answer:True False Correct Marks for this submission: 1/1. Question 14 Marks: 1 What percentage of the red blood cell's protein is hemoglobin? Choose one answer. a. 65% b. 12% c. 5% d. 95% Correct Marks for this submission: 1/1. Question 15 Marks: 1 Se deficiency in poultry is called: Choose one answer. a. exudative diathesis b. white muscle disease c. bloat d. perosis Correct Marks for this submission: 1/1. Question 16 Marks: 1 In general ruminants, especially those grazing pasture, derive their water soluble vitamins from microbial synthesis in the rumen: Answer: True False Correct Marks for this submission: 1/1. Question 17 Marks: 1 Which of the following is the most biologically available form of vitamin B12? Choose one answer. a. cynaocobalamin b. methylcobalamin c. hydroxycobalamind. none of the answers are correct Correct Marks for this submission: 1/1. Question 18 Marks: 1 Megaloblastic anemia is associated with unusually large: Choose one answer. a. platelets b. neutrophils c. red blood cells d. mast cells Correct Marks for this submission: 1/1. Question 19 Marks: 1 Which of the following interferes with Ca absorption? Choose one answer. a. high fiber diet b. vitamin D deficiency c. lactose d. high fiber diet and vitamin D deficiency Correct Marks for this submission: 1/1. Question 20 Marks: 1 In cattle, Cu deficiency causes achromatrichia: Answer: True False Correct Marks for this submission: 1/1. Question 21 Marks: 1 In humans, providing a Ca/P ratio of 1/10 can adversely affect Ca balance: Answer: True False Incorrect Marks for this submission: 0/1.Question 22 Marks: 1 Parenteral administration of riboflavin can be toxic to the kidneys: Answer: True False Correct Marks for this submission: 1/1. Question 23 Marks: 1 Induced deficiencies of riboflavin in humans are accompanied by the following symptoms: Choose one answer. a. cheilosis b. dermatis of the vulva c. angular stomatist d. all of the answers are correct Correct Marks for this submission: 1/1. Question 24 Marks: 1 The trabecular zone of the bone begins to demineralize after which age? Choose one answer. a. 20 b. 30 c. 40 d. 50 Correct Marks for this submission: 1/1. Question 25 Marks: 1 POWs suffering from pantothenic acid deficiency complain of the sensation of: Choose one answer. a. chills b. fever c. coughing d. burning feetCorrect Marks for this submission: 1/1. Question 26 Marks: 1 Mrs. Joseph Goldberger participated in her husband's fun and tasty experiments? Answer: True False Correct Marks for this submission: 1/1. Question 27 Marks: 1 Vitamin B12 does not play a role in the conversion of homocysteine to methionine: Answer: True False Correct Marks for this submission: 1/1. Question 28 Marks: 1 The term used to describe the chewing of wood, dirt and other debris by ruminants that are bored or suffering from a mineral deficiency is called: Choose one answer. a. scruff b. grinding c. pica d. foraging Correct Marks for this submission: 1/1. Question 29 Marks: 1 Which of the following cell types is stimulated by calcitonin to increase Ca deposition into bones? Choose one answer. a. enterocytes b. osteoclasts c. parietal cells d. osteoblastsCorrect Marks for this submission: 1/1. Question 30 Marks: 1 Niacin transport is passive both at high and low concentrations in the intestinal tract: Answer: