A patient on a low-sodium diet should avoid which of the following foods?
- A. Fresh fruits
- B. Unsalted nuts
- C. Canned soup
- D. Plain rice
Correct Answer: C
Rationale: Canned soup is the correct answer. Canned soups are often high in sodium due to added salt and should be avoided on a low-sodium diet. Fresh fruits (Choice A) are typically low in sodium and a good choice for a low-sodium diet. Unsalted nuts (Choice B) are also low in sodium and can be included in a low-sodium diet. Plain rice (Choice D) is a low-sodium food and can be part of a low-sodium diet.
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Which mineral is a principal component of cell membranes?
- A. phosphorus
- B. magnesium
- C. iron
- D. iodine
Correct Answer: A
Rationale: Phosphorus is the correct answer. It is a key component of cell membranes, being part of the phospholipid bilayer that provides structure and controls the movement of substances in and out of cells. Magnesium, iron, and iodine do not serve as principal components of cell membranes. Magnesium is involved in various enzymatic reactions, iron is essential for oxygen transport, and iodine plays a role in thyroid hormone synthesis.
Reducing the amount of trans fat in the diet is an effective method of decreasing the risk of CHD. Which food is most likely a source of trans fat?
- A. hot dogs
- B. whole milk
- C. fatty fish
- D. potato chips
Correct Answer: D
Rationale: The correct answer is D: potato chips. Potato chips, especially when fried in hydrogenated oils, are a common source of trans fats, which are linked to an increased risk of coronary heart disease (CHD). Hot dogs (choice A) can also contain trans fats if made with processed meats and added fats. Whole milk (choice B) and fatty fish (choice C) do not typically contain trans fats, making them less likely sources compared to potato chips.
What is the term for a condition where one or more members of a household, including children, consistently have little or no food due to lack of money?
- A. Marginal Food Security
- B. Food Desert
- C. Very Low Food Security
- D. Food Insecurity
Correct Answer: D
Rationale: The correct answer is 'D: Food Insecurity'. This term specifically describes a situation where household members consistently have inadequate access to food due to financial constraints. 'Marginal Food Security' (Choice A) refers to a situation where the quality or variety of food is reduced, but there is no significant decrease in food intake. A 'Food Desert' (Choice B) is an area with limited access to affordable and nutritious food. 'Very Low Food Security' (Choice C) is a term used to describe a severe level of food insecurity where eating patterns of household members are disrupted and food intake is reduced.
What is the most common type of kidney stone?
- A. Cystine
- B. Calcium
- C. Struvite
- D. Uric acid
Correct Answer: B
Rationale: The most common type of kidney stone is calcium-based, specifically calcium oxalate. This is usually due to high calcium levels in the urine, which can be caused by dietary factors or certain metabolic disorders. Cystine stones, on the other hand, are less common and occur in individuals with a hereditary disorder leading to excessive excretion of certain amino acids. Struvite stones are often formed in response to an infection. Uric acid stones may occur in individuals who do not consume sufficient fluids or who lose too much fluid, among other factors. Therefore, while all these substances can form stones in the kidneys, calcium stones are the most common.
What is the glomerular filtration rate for patients with stage 5 chronic kidney disease (CKD)?
- A. Less than 15 mL/min/1.73 m²
- B. Less than 30 mL/min/1.73 m²
- C. Less than 90 mL/min/1.73 m²
- D. Less than 125 mL/min/1.73 m²
Correct Answer: A
Rationale: In patients with stage 5 chronic kidney disease (CKD), also known as end-stage renal disease, the kidney function is significantly compromised. This severe condition is characterized by a glomerular filtration rate (GFR) of less than 15 mL/min/1.73 m², as correctly stated in choice A. Choices B, C, and D suggest higher GFR values, which are not indicative of stage 5 CKD. Specifically, a GFR of less than 30 mL/min/1.73 m² indicates stage 4 CKD, less than 90 mL/min/1.73 m² signifies stage 3 CKD, and a typical healthy individual usually has a GFR of around 125 mL/min/1.73 m², which is far above the GFR for stage 5 CKD.