Nokea
The pancreas and liver release their secretions into the
- A. stomach.
- B. ileum.
- C. duodenum.
- D. jejunum.
Correct Answer: C
Rationale: The correct answer is C: duodenum. The pancreas and liver release their secretions, such as pancreatic enzymes and bile, into the duodenum. This is because the duodenum is the first part of the small intestine where digestion primarily occurs. The stomach (A) is responsible for initial digestion of food, while the ileum (B) and jejunum (D) are parts of the small intestine where absorption of nutrients occurs, not secretion release.
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The function of the migrating motor
- A. is to:
- B. Empty non-digestable material from stomach and small intestine during fasting
- C. Initiate mass movements in the large intestine
- D. Increase intestinal peristalsis in response to overfeeding
Correct Answer: B
Rationale: The migrating motor complex (MMC) functions to clear non-digestible material from the stomach and small intestine during fasting periods. Step 1: During fasting, MMC promotes gastrointestinal motility to prevent bacterial overgrowth. Step 2: MMC consists of 3 phases - quiescent, irregular contractions, and intense contractions - aiding in sweeping undigested materials. Step 3: This process helps maintain gut health and prevents issues like bacterial overgrowth or malabsorption. Summary: Choices A, C, and D are incorrect as they do not accurately describe the specific function of the migrating motor complex during fasting.
Which of the following statements is true regarding arterioles?
- A. they are less muscular than arteries, and the principle site of blood pressure regulation
- B. they are the most muscular of the major vessels, and have low blood flow velocity
- C. they are thin walled with little innervation
- D. they have no smooth muscle or connective tissue, and relatively low rates of blood flow
Correct Answer: A
Rationale: Step 1: Arterioles are smaller branches of arteries that lead to capillaries.
Step 2: Arterioles are indeed less muscular than arteries but more muscular than capillaries.
Step 3: Arterioles play a crucial role in regulating blood pressure through vasoconstriction and vasodilation.
Step 4: Choice A is correct as it accurately describes arterioles' role in blood pressure regulation.
Summary: Choice B is incorrect as arterioles are not the most muscular of major vessels. Choice C is incorrect as arterioles have significant innervation. Choice D is incorrect as arterioles do have smooth muscle and connective tissue, and they regulate blood flow efficiently.
Which of the following vitamins is fat-soluble?
- A. B12
- B. C
- C. D
- D. E
Correct Answer: C
Rationale: The correct answer is C: D. Vitamin D is fat-soluble because it can be stored in the body's fatty tissues and liver. This allows for a slower release into the bloodstream when needed. Vitamins B12, C, and E are water-soluble, meaning they dissolve in water and are not stored in the body. Vitamin B12 is stored in the liver, but it is not considered fat-soluble. Vitamin C is excreted through urine, and Vitamin E is stored in body tissues but not in fat. Therefore, the only fat-soluble vitamin among the options provided is Vitamin D.
A nurse is providing teaching for a client who has a new diagnosis of gastroesophageal reflux disease (GERD). The client asks about foods he should avoid eating. Which of the following foods should the nurse tell him to avoid?
- A. Nonfat milk
- B. Chocolate
- C. Apples
- D. Oatmeal
Correct Answer: B
Rationale: The correct answer is B: Chocolate. Chocolate is high in fat and caffeine, which can relax the lower esophageal sphincter, leading to increased acid reflux in GERD. Nonfat milk (A), apples (C), and oatmeal (D) are actually recommended for GERD as they are low in fat and acidic content, and can help reduce symptoms.
The enteric plexus in the tunica submucosa is called the ______ plexus.
- A. Meissner's
- B. Auerbach's
- C. myenteric
- D. solar
Correct Answer: A
Rationale: The correct answer is A: Meissner's plexus. Meissner's plexus is located in the tunica submucosa and is responsible for controlling the movements of the muscularis mucosae. It regulates local blood flow, secretion, and absorption in the small intestine. Auerbach's plexus, located in the muscularis externa, controls the motility of the muscular layer. Myenteric plexus is another name for Auerbach's plexus. Solar plexus is a network of nerves located in the abdomen, not specifically related to the enteric plexus.