If someone stops ingesting vitamin B12, what would you expect to happenO A deficiency syndrome would develop of a period of a few years, depending on body storesEffects of low vitamin B12 will be observable in a matter of weeks, since it is a water-soluble vitaminThere will be no effect, because gut bacteria can synthesize this vitamin for usO Scurvy will arise after a long period of time as body stores are gradually depleted

Introduction: Vitamin B12 is a water soluble vitamin which is required for metabolism process. Main…

Answered: If someone stops ingesting vitamin B12,…

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter16: The Body's System

Section: Chapter Questions

Problem 11RQ: Which of the following statements is not true? a. Essential nutrients can be synthesized by the...

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People who begin to lose weight often havea rapid weight loss in the first few days. Common knowledge saysthat this is “just” because of a loss of water from the body. Whymight this be true?
In the presence of sunlight, Vitamin D precursors are produced. This is important for the transport of sodium in our intestines. Is this statement true or false?
Gout—a condition that results in joint swelling and pain—iscaused by the formation of sodium urate (NaC5H3N4O3) crystalswithin tendons, cartilage, and ligaments. Sodium urate precipitatesout of blood plasma when uric acid levels become abnormallyhigh. This can happen as a result of eating too many rich foodsand consuming too much alcohol, which is why gout is sometimesreferred to as the “disease of kings.” If the sodium concentration inblood plasma is 0.140 M and Ksp for sodium urate is 5.76 * 10-8,what minimum concentration of urate results in precipitation?
Triglycerides are transported by chylomicrons because________.a. they cannot move easily in the blood streambecause they are fat based, while the blood iswater basedb. they are too small to move by themselvesc. the chylomicrons contain enzymes they need foranabolismd. they cannot fit across the intestinal membrane
How does vitamin C act inthe body? What is the harmcaused by insufficiency ofvitamin C? Why was thisdeficiency also known as“sailors' disease”?
Inflammation of the digestive tract is common to most irritable bowel diseases causing in decreased capacity to absorb nutrients and minerals. In extreme cases, this can lead to severe diarrhea, malnutrition, osteoporosis (weakening of the bones), and iron deficiency, to name a few. , which region(s) and structure(s) of the alimentary canal is (are) most likely targets of inflammation? Explain your answer based on the roles of each segment of the alimentary canal.
What is the differencebetween water-soluble andfat-soluble vitamins? Why canfat-soluble vitamins causeharm when ingested inexcess?
Which of the following might be true of an individual unable to synthesize and secrete intrinsic factor? a. They would be unable to absorb adequate amounts of vitamin B12. b. They would be unable to digest lactose found in dairy products. c. They would be unable to absorb amino acids in the small intestine. d. They would be unable to digest and absorb triglycerides
Kwashiorkor is a protein-deficiency disease that occurs most commonly in small children, who characteristically have thin arms and legs and bloated, distended abdomens due to fluid imbalance. When such children areplaced on adequate diets, they tend to lose weight at first. Explain this observation.
People on high-fiber diets often have lesscancer (especially of the colon) and lower blood-cholesterol levelsthan people on low-fiber diets, even though fiber is not digestible.Suggest reasons for the benefits of fiber
How would removal of 95% of the stomach (subtotal gastrec-tomy) to treat severe ulcers or cancer affect digestion andabsorption? How would the patients have to alter eating hab-its? Why? Do you think that people should have this type ofsurgery to treat life-threatening obesity?
In celiac disease, the patient’s immune system attacks and damages the villi of the small intestine. Use this information and your understanding of the digestive system to explain why patients with undiagnosed celiac disease may develop disorders associated with nutritional deficiencies, such as anemia (from lack of iron) or osteoporosis (from lack of calcium), even if they are eating a healthy diet.

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