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Nutrition ATI Proctored Exam
1. How is the stomach protected from damage by gastric acid?
- A. enzymes present in the stomach
- B. a protective bacteria in the stomach
- C. bicarbonate present in the stomach
- D. the mucus lining of the stomach
Correct answer: D
Rationale: The correct answer is D. The stomach is protected from gastric acid by a thick mucus lining that acts as a physical barrier, preventing the acid from eroding the stomach walls. Enzymes in the stomach help with digestion but do not play a significant role in protecting the stomach from acid damage, so choice A is incorrect. While some bacteria in the stomach can be beneficial, they do not primarily protect the stomach from gastric acid, making choice B incorrect. Bicarbonate, a base, can neutralize acid, but it is not the primary defense mechanism against gastric acid in the stomach, so choice C is also incorrect.
2. Sucrose consists of a combination of glucose and:
- A. maltose.
- B. fructose.
- C. galactose.
- D. lactose.
Correct answer: B
Rationale: The correct answer is B, fructose. Sucrose is a disaccharide composed of one molecule of glucose and one molecule of fructose. Maltose (choice A) is composed of two glucose molecules, galactose (choice C) is a monosaccharide, and lactose (choice D) is composed of one molecule of glucose and one molecule of galactose. Therefore, fructose is the correct choice for the second component of sucrose.
3. Which of the following statements are correct?
- A. Lipids are transported in the blood as lipoproteins, which are clusters of lipids associated with proteins.
- B. In type II diabetes, the pancreas produces insulin, but cells are resistant to this signal.
- C. The glycemic index classifies foods based on their potential to raise blood glucose levels.
- D. All of the above
Correct answer: D
Rationale: Option A is correct because lipoproteins indeed transport lipids in the blood. They are complexes of lipids and proteins that transport water-insoluble lipids through the blood. Option B is correct as it accurately describes the condition of type II diabetes where the pancreas can produce insulin, but the cells are resistant to its signal, causing an ineffective regulation of blood sugar. Option C is also correct because the glycemic index is indeed a classification system for foods based on their potential to raise blood glucose levels. High glycemic index foods raise blood glucose levels faster than low glycemic index foods. Hence, all the statements are correct, making option D the correct answer.
4. Which of the following conditions is not caused by energy drinks?
- A. Nervousness
- B. Bradycardia
- C. Seizures
- D. Dental caries
Correct answer: B
Rationale: Energy drinks are known for causing a variety of health issues, including nervousness, seizures, and an increased risk of dental caries due to their high sugar content. However, they do not cause bradycardia, which is a slow heart rate. Instead, energy drinks are associated with causing an increased or rapid heart rate, known as tachycardia. Therefore, out of the listed options, bradycardia is the condition not caused by energy drinks.
5. In which health problem is protein catabolism increased?
- A. severe burns
- B. severe obesity
- C. hypothyroidism
- D. food allergies
Correct answer: A
Rationale: Protein catabolism increases in conditions like severe burns because the body breaks down muscle protein to provide energy for healing. Severe obesity does not necessarily increase protein catabolism; instead, it is more related to excessive fat accumulation. Hypothyroidism may lead to a decrease in metabolic rate but does not directly increase protein catabolism. Food allergies trigger an immune response to specific foods but do not directly impact protein catabolism.
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