Nokea
Which enzyme is responsible for breaking down carbohydrates in the mouth?
- A. Amylase
- B. Protease
- C. Lipase
- D. Pepsin
Correct Answer: A
Rationale: The correct answer is A: Amylase. Amylase is an enzyme that specifically breaks down carbohydrates into sugars in the mouth. It is produced by both salivary glands and pancreas. Protease (B) breaks down proteins, Lipase (C) breaks down fats, and Pepsin (D) breaks down proteins in the stomach. Therefore, A is the correct answer for the enzyme responsible for breaking down carbohydrates in the mouth.
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What instruction should be given to a client scheduled for a gallbladder series test?
- A. To remain on a low-residue diet 1 to 2 days before the test
- B. To take a laxative the evening before the test
- C. Not to eat or drink until the test is complete
- D. To take cleansing enemas the morning of the test
Correct Answer: C
Rationale: The correct instruction for a client scheduled for a gallbladder series test is not to eat or drink until the test is complete. This is because the test requires fasting to ensure clear visualization of the gallbladder and surrounding structures. Eating or drinking could interfere with the results by causing gallbladder contraction or obscuring the images.
A) Instructing the client to remain on a low-residue diet is not necessary for this specific test and may not provide the required fasting.
B) Taking a laxative or cleansing enemas is not typically required for a gallbladder series test and can be unnecessary and may even be harmful.
The falciform ligament separates the right from _____ lobe.
- A. quadrate
- B. left
- C. caudate
- D. pancreatic
Correct Answer: B
Rationale: The falciform ligament separates the right and left lobes of the liver. This is because it attaches the liver to the anterior abdominal wall and suspends it from the diaphragm, dividing the liver into right and left lobes. The quadrate, caudate, and pancreatic lobes are not separated by the falciform ligament, making choices A, C, and D incorrect, respectively.
The following is true about the small intestine:
- A. Stores food for several hours
- B. Is the main source of digestive enzymes
- C. Has haustrae
- D. Has segmentation contractions
Correct Answer: D
Rationale: The correct answer is D: The small intestine has segmentation contractions. This is because segmentation contractions are responsible for mixing and moving chyme (partially digested food) along the small intestine, allowing for optimal nutrient absorption. This process helps maximize the contact between chyme and the intestinal walls, facilitating absorption.
A: Incorrect. The small intestine does not store food for several hours; instead, it continuously processes and absorbs nutrients.
B: Incorrect. While the small intestine plays a crucial role in digestion and absorption, the main source of digestive enzymes is the pancreas.
C: Incorrect. Haustrae are found in the large intestine, not the small intestine. They aid in the absorption of water and electrolytes.
Nurse Hannah is teaching a group of middle-aged men about peptic ulcers. When discussing risk factors for peptic ulcers, the nurse should mention:
- A. A sedentary lifestyle and smoking.
- B. A history of hemorrhoids and smoking.
- C. Alcohol abuse and a history of acute renal failure.
- D. Alcohol abuse and smoking.
Correct Answer: D
Rationale: The correct answer is D: Alcohol abuse and smoking. Both alcohol abuse and smoking are well-established risk factors for peptic ulcers. Alcohol can irritate and damage the stomach lining, while smoking can increase stomach acid production and weaken the stomach lining. These factors can contribute to the development of peptic ulcers.
Choice A (A sedentary lifestyle and smoking) is incorrect because while smoking is a risk factor, a sedentary lifestyle is not directly linked to the development of peptic ulcers.
Choice B (A history of hemorrhoids and smoking) is incorrect because hemorrhoids are not a known risk factor for peptic ulcers.
Choice C (Alcohol abuse and a history of acute renal failure) is incorrect because acute renal failure is not typically associated with an increased risk of peptic ulcers, unlike alcohol abuse.
Glucose absorption from the small intestine is by:
- A. Simple passive diffusion.
- B. Sodium-glucose co-transport system.
- C. Osmosis.
- D. Primary active transport.
Correct Answer: B
Rationale: The correct answer is B: Sodium-glucose co-transport system. This system involves the active transport of glucose across the small intestine epithelial cells with the help of sodium ions. This mechanism allows for the absorption of glucose against its concentration gradient, ensuring efficient uptake. Other choices are incorrect because: A) Simple passive diffusion is not efficient for glucose absorption due to its hydrophilic nature. C) Osmosis is the movement of water molecules, not glucose. D) Primary active transport involves the direct use of energy to transport molecules, which is not the case for glucose absorption in the small intestine.