Nokea
The functions of the colon include the following except:
- A. Absorption of water
- B. Absorption of sodium
- C. Absorption of chloride
- D. Absorption of calcium
Correct Answer: D
Rationale: The correct answer is D: Absorption of calcium. The colon primarily absorbs water, sodium, and chloride, but not calcium. Calcium absorption mainly occurs in the small intestine. The colon's main function is to absorb water and electrolytes, and to store and eliminate waste. Therefore, absorption of calcium does not occur in the colon, making choice D the correct answer. Choices A, B, and C are incorrect as the colon is involved in the absorption of water, sodium, and chloride, respectively.
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Which esophageal disorder is described as a precancerous lesion associated with GERD?
- A. Achalasia
- B. Barrett's esophagus
- C. Esophageal strictures
- D. Esophageal diverticula
Correct Answer: B
Rationale: Barrett's esophagus is the correct answer because it is a precancerous condition resulting from long-term GERD. The constant exposure to stomach acid causes changes in the esophageal lining, increasing the risk of esophageal cancer.
Achalasia (A) is a motility disorder characterized by difficulty swallowing due to impaired esophageal muscle movement. Esophageal strictures (C) are narrowing of the esophagus, commonly caused by chronic inflammation or scarring, but not directly associated with GERD. Esophageal diverticula (D) are outpouchings in the esophageal wall, not specifically linked to GERD or cancer risk.
A nurse is assessing a client who has peptic ulcer disease. Which of the following findings should the nurse identify as the priority?
- A. Epigastric discomfort
- B. Dyspepsia
- C. Constipation
- D. Hematemesis
Correct Answer: D
Rationale: The correct answer is D, Hematemesis. This is the priority finding because it indicates upper gastrointestinal bleeding, which can be life-threatening. The nurse should address this immediately to prevent further complications. Epigastric discomfort (A) and dyspepsia (B) are common symptoms of peptic ulcer disease but do not indicate active bleeding. Constipation (C) is not directly related to peptic ulcer disease and does not pose an immediate threat to the client's health.
Which of the following is not a function of the adult liver?
- A. glycogen storage
- B. detoxification
- C. synthesis of clotting proteins
- D. erythropoiesis
Correct Answer: D
Rationale: The correct answer is D: erythropoiesis. The liver does not have a primary role in the production of red blood cells (erythropoiesis), which is mainly carried out by the bone marrow.
A: The liver stores glycogen for energy regulation.
B: Detoxification is a crucial function of the liver, breaking down harmful substances.
C: The liver synthesizes clotting proteins like fibrinogen.
In summary, while the liver is vital for glycogen storage, detoxification, and clotting protein synthesis, it does not play a significant role in erythropoiesis.
Which of the following statements are correct? P. Mechanical digestion occurs in the stomach. Q. Cholecystokinin, gastrin and secretin are produced by an enteroendocrine cells. R. Pancreas, small intestine and salivary glands produce digestive enzymes. S. Mucous neck cells, chief cells, parietal cells present in the stomach.
- A. P and Q
- B. Q and R
- C. P,Q and R
- D. P,Q,R and S
Correct Answer: D
Rationale: Sure! Here is a step-by-step rationale for why answer choice D is correct:
P. Mechanical digestion occurs in the stomach: This statement is correct as the stomach performs mechanical digestion through the churning and mixing of food with gastric juices.
Q. Cholecystokinin, gastrin, and secretin are produced by enteroendocrine cells: This statement is correct as these hormones are indeed produced by enteroendocrine cells to regulate various digestive processes.
R. Pancreas, small intestine, and salivary glands produce digestive enzymes: This statement is correct as these organs are key producers of digestive enzymes essential for breaking down food components.
S. Mucous neck cells, chief cells, parietal cells are present in the stomach: This statement is correct as these are the types of cells found in the gastric glands of the stomach responsible for producing mucus, pepsinogen, and hydrochloric acid, respectively.
In summary, all the statements in answer choice D
Which of these processes occurs in the mouth?
- A. ingestion
- B. mechanical digestion
- C. chemical digestion
- D. all of the above
Correct Answer: D
Rationale: In the mouth, ingestion occurs when food is taken in. Mechanical digestion occurs through chewing and mixing food with saliva. Chemical digestion begins with enzymes in saliva breaking down carbohydrates. Therefore, all processes (ingestion, mechanical digestion, and chemical digestion) occur in the mouth. Other choices are incorrect because they do not encompass all the processes that happen in the mouth.