Nokea
How do foods or supplements containing significant amounts of plant sterols help lower LDL cholesterol levels?
- A. reducing cholesterol synthesis
- B. suppressing inflammation
- C. reducing blood clotting
- D. interfering with cholesterol and bile absorption
Correct Answer: D
Rationale: Plant sterols interfere with cholesterol and bile absorption in the intestines. This interference helps lower LDL cholesterol levels by reducing the amount of cholesterol that enters the bloodstream. Choices A, B, and C are incorrect because plant sterols primarily work by interfering with cholesterol and bile absorption, not by reducing cholesterol synthesis, suppressing inflammation, or reducing blood clotting.
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People with only one arm or hand may benefit from using a ____ when eating?
- A. dish with suction cups
- B. rocker knife
- C. utensil holder
- D. flexible straw
Correct Answer: B
Rationale: A rocker knife is specifically designed for individuals with limited use of one hand or arm, allowing them to cut food easily. This makes it a suitable option for people with only one arm or hand. Choice A, a dish with suction cups, may not directly aid in cutting food with one hand. Choice C, an utensil holder, is not typically used for cutting food. Choice D, a flexible straw, is more related to drinking liquids and not specifically designed to assist in cutting food one-handed.
Where is Vitamin K synthesized?
- A. by bacteria in the GI tract
- B. by the body by sunlight
- C. deficiency is called beriberi
- D. found in vegetable oils
Correct Answer: A
Rationale: Vitamin K is synthesized by bacteria in the gastrointestinal tract. Choice B is incorrect as the synthesis of Vitamin D, not K, can be induced by sunlight exposure. Choice C is incorrect as beriberi is a condition caused by thiamine (Vitamin B1) deficiency, not Vitamin K. Choice D is incorrect as Vitamin E is commonly found in vegetable oils, not Vitamin K.
Dietary fiber has been recommended for its possible benefits in reducing heart disease by lowering blood cholesterol. How is fiber thought to play its role in lowering blood cholesterol?
- A. Insoluble fiber binds with cholesterol in the large intestine and is excreted in feces
- B. Viscous fiber binds with bile in the intestine and is excreted in feces
- C. Soluble fiber binds with cholesterol in the blood and is excreted by the liver
- D. Insoluble fiber converts to bile in the large intestine and binds with cholesterol
Correct Answer: B
Rationale: The correct answer is B. Viscous (soluble) fiber binds with bile acids in the intestine, which are then excreted. The liver must use cholesterol to make more bile acids, thereby lowering blood cholesterol levels. Choice A is incorrect as insoluble fiber does not bind with cholesterol in the large intestine. Choice C is incorrect as soluble fiber does not directly bind with cholesterol in the blood. Choice D is incorrect as insoluble fiber does not convert to bile in the large intestine to bind with cholesterol.
Which test is used to monitor the degree of blood glucose control over a long period?
- A. Glucose tolerance test
- B. Glycated hemoglobin level
- C. Self-monitoring of blood glucose
- D. 24-hour urinary glucose excretion
Correct Answer: B
Rationale: The correct answer is B, glycated hemoglobin level. The glycated hemoglobin (HbA1c) test measures the average blood glucose levels over the past 2-3 months, providing a long-term picture of glucose control. Choice A, the glucose tolerance test, measures how well your body processes glucose but is not specifically for long-term monitoring. Choice C, self-monitoring of blood glucose, involves daily testing by individuals, providing immediate rather than long-term information. Choice D, 24-hour urinary glucose excretion, measures the amount of glucose excreted in the urine over 24 hours and is not typically used for long-term monitoring of blood glucose control.
After consuming a meal high in fat, the _____ releases _______ to aid in digestion.
- A. stomach, acid
- B. liver, bile
- C. pancreas, bicarbonate
- D. gallbladder, bile
Correct Answer: D
Rationale: The gallbladder releases bile into the small intestine to help digest fats. Bile emulsifies fats, breaking them down into smaller droplets for easier digestion. The stomach primarily releases gastric acid, the liver produces bile but stores it in the gallbladder, and the pancreas secretes bicarbonate to neutralize stomach acid in the small intestine. Therefore, choices A, B, and C are incorrect.