Nokea
Which of the following is the transporter for fructose in the small intestine?
- A. SGLT1
- B. SGLT2
- C. GLUT4
- D. GLUT5
Correct Answer: D
Rationale: The correct answer is D: GLUT5. GLUT5 is the specific transporter responsible for transporting fructose across the apical membrane of enterocytes in the small intestine. It is a uniporter that facilitates the movement of fructose down its concentration gradient via facilitated diffusion. SGLT1 (Choice A) and SGLT2 (Choice B) are sodium-glucose transporters involved in the absorption of glucose and galactose, not fructose. GLUT4 (Choice C) is primarily found in muscle and adipose tissue and is responsible for insulin-mediated glucose uptake, not fructose transport in the small intestine.
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A 40-year-old severely obese female patient with type 2 diabetes wants to lose weight. After learning about the surgical procedures
- A. she thinks a combination of restrictive and malabsorptive surgery would be best. Which procedure should the nurse teach her about?
- B. Lipectomy
- C. Roux-en-Y gastric bypass
- D. Adjustable gastric banding
Correct Answer: B
Rationale: The correct answer is B: Lipectomy. This procedure involves the removal of excess fat tissue, which can help the patient achieve weight loss. In contrast, options C and D are bariatric surgeries, which are not solely focused on fat removal and may not be suitable for this patient given her age and medical history. Option A, a combination of restrictive and malabsorptive surgery, may pose higher risks for complications in a severely obese patient with diabetes. Lipectomy is a more targeted and less invasive approach to weight loss, making it the most appropriate choice in this scenario.
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.
If you place a pin through the greater omentum, through how many layers of simple squamous epithelium would the pin pass?
- B. 1
- C. 2
- D. 3
Correct Answer: C
Rationale: The correct answer is C (2 layers). The greater omentum consists of a double layer of peritoneum, which is a serous membrane composed of simple squamous epithelium. Therefore, when a pin is placed through the greater omentum, it would pass through two layers of simple squamous epithelium. Choice A (0) is incorrect because there are indeed layers of epithelium in the greater omentum. Choice B (1) is incorrect because there are two layers of epithelium. Choice D (3) is incorrect as there are only two layers to pass through.
Which of the following is an accessory organ of digestion?
- A. pancreas
- B. esophagus
- C. stomach
- D. small intestine
Correct Answer: A
Rationale: The correct answer is A: pancreas. The pancreas is an accessory organ of digestion because it produces digestive enzymes that help break down carbohydrates, fats, and proteins in the small intestine. It also secretes bicarbonate to neutralize stomach acid. The esophagus (B) is a part of the digestive tract but not an accessory organ. The stomach (C) and small intestine (D) are primary organs of digestion, not accessory organs.
Which of the following sports drinks would BEST promote BOTH glucose absorption and water absorption (hydration) during aerobic exercise?
- A. Drink A: 20% carbohydrate and sodium free
- B. Drink B: 8% carbohydrate and sodium free
- C. Drink C: 20% carbohydrate and contains sodium
- D. Drink D: 8% carbohydrate and contains sodium
Correct Answer: D
Rationale: The correct answer is D: Drink D with 8% carbohydrate and contains sodium. During aerobic exercise, glucose and sodium are crucial for optimal hydration and energy replenishment. The 8% carbohydrate concentration is within the recommended range for efficient glucose absorption, while the presence of sodium helps in fluid retention and electrolyte balance. Choices A and B lack sodium, which is necessary for hydration. Choice C has the right carbohydrate concentration but lacks sodium, making it less effective compared to Drink D.