Nokea
What condition has been shown to be associated with esophageal dysphagia?
- A. myasthenia gravis
- B. achalasia
- C. Alzheimer's disease
- D. cerebral palsy
Correct Answer: B
Rationale: Achalasia is the correct answer. It is a condition characterized by the esophagus having difficulty moving food toward the stomach, resulting in dysphagia (difficulty swallowing). Myasthenia gravis (Choice A) is a neuromuscular disorder that affects skeletal muscles, not the esophagus. Alzheimer's disease (Choice C) primarily affects cognitive function, not the esophagus. Cerebral palsy (Choice D) is a neurological disorder affecting body movement and muscle coordination, unrelated to esophageal dysphagia.
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What is the function of the gallbladder?
- A. to store bile
- B. to produce bile
- C. to digest bile
- D. to modify bile to a liquid form
Correct Answer: A
Rationale: The correct answer is A: "to store bile." The gallbladder acts as a reservoir for bile produced by the liver. It releases bile into the small intestine to aid in the digestion of fats. Choice B is incorrect because the liver produces bile, not the gallbladder. Choice C is incorrect as the gallbladder does not digest bile but stores and releases it for digestion. Choice D is incorrect because bile is already in liquid form; the gallbladder does not modify it to a liquid state.
A dental hygienist finds several new carious lesions in a patient with chronic obstructive respiratory disease (COPD). While conducting the medical and dental histories, the dental hygienist is most likely to find an increased use of which of the following?
- A. Protein
- B. Cough drops
- C. Fluoride
- D. Xylitol
Correct Answer: B
Rationale: The correct answer is B: Cough drops. Patients with COPD often use cough drops to manage their symptoms, which can lead to an increase in carious lesions due to their sugar content. Choices A, C, and D are incorrect as protein, fluoride, and xylitol are not typically associated with an increased risk of carious lesions in patients with COPD.
Which of the following is not a desirable blood lipid value?
- A. low total cholesterol
- B. high LDL
- C. high HDL
- D. low blood triglycerides
Correct Answer: B
Rationale: The correct answer is B. High levels of LDL (low-density lipoprotein) cholesterol are undesirable as they are associated with an increased risk of cardiovascular disease. Therefore, low total cholesterol (choice A), high HDL (choice C), and low blood triglycerides (choice D) are considered desirable blood lipid values. Low total cholesterol is beneficial as high levels can increase the risk of heart disease. High HDL cholesterol is considered good as it helps remove LDL cholesterol from the arteries. Low blood triglycerides are also preferred as high levels are associated with an increased risk of heart disease.
Which of the following foods or beverages would offer the most nutrients per calorie?
- A. chicken
- B. wine
- C. white bread
- D. broccoli
Correct Answer: D
Rationale: Broccoli is indeed the correct answer. Broccoli is considered nutrient-dense, meaning it provides a significant amount of essential nutrients like vitamins, minerals, and fiber while being relatively low in calories. On the other hand, choices A, B, and C are not as nutrient-dense as broccoli. Chicken can be nutritious but may vary in nutrient content depending on the cut and preparation method. Wine, although containing antioxidants like resveratrol, is not a significant source of essential nutrients. White bread is often low in nutrients and fiber compared to whole grain options, making it less nutrient-dense than broccoli.
Which vitamin is essential for proper blood clotting?
- A. Vitamin A
- B. Vitamin E
- C. Vitamin K
- D. Vitamin C
Correct Answer: C
Rationale: Vitamin K is vital for the synthesis of clotting factors, which are necessary for proper blood clotting. Vitamin A (Choice A) is important for vision and skin health, not blood clotting. Vitamin E (Choice B) is an antioxidant that helps protect cells from damage but is not directly involved in blood clotting. Vitamin C (Choice D) is essential for collagen synthesis and a healthy immune system, but it does not play a direct role in blood clotting.