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How will an obstruction at the ampulla of Vater affect the digestion of all nutrients?
- A. Bile is responsible for emulsification of all nutrients and vitamins.
- B. Intestinal digestive enzymes are released through the ampulla of Vater.
- C. Both bile and pancreatic enzymes enter the duodenum at the ampulla of Vater.
- D. Gastric contents can only pass to the duodenum when the ampulla of Vater is open.
Correct Answer: C
Rationale: The ampulla of Vater is the entry point for both bile and pancreatic enzymes essential for digesting all nutrients.
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Which finding by the nurse during abdominal auscultation indicates a need for a focused abdominal assessment?
- A. Loud gurgles
- B. High-pitched gurgles
- C. Absent bowel sounds
- D. Frequent clicking sounds
Correct Answer: C
Rationale: The correct answer is C, absent bowel sounds. Absence of bowel sounds may indicate a serious issue requiring further assessment. Normal bowel sounds include soft gurgles and clicks, so choices A, B, and D are variations of normal findings and do not necessarily indicate a need for further assessment. Absent bowel sounds could indicate bowel obstruction, peritonitis, or ischemia, warranting a focused abdominal assessment to determine the underlying cause.
The projection from the posterior edge of the soft palate elevates and helps close off the nasopharynx when swallowing. The projection is called the
- A. buccal fat pad.
- B. epiglottis.
- C. uvula.
- D. palatine tonsil.
Correct Answer: C
Rationale: The correct answer is C: uvula. The uvula is a teardrop-shaped projection from the posterior edge of the soft palate that elevates during swallowing to help close off the nasopharynx, preventing food or liquids from entering the nasal cavity. The uvula's contraction is essential for proper swallowing function.
A: Buccal fat pad - located in the cheek area, not involved in swallowing or closing off the nasopharynx.
B: Epiglottis - a flap of tissue that covers the trachea during swallowing to prevent food from entering the airway, not related to closing off the nasopharynx.
D: Palatine tonsil - located on the sides of the throat, important for immune function but not directly involved in swallowing or closing off the nasopharynx.
Which of these is a function of the large intestine?
- A. nutrient absorption
- B. bile production
- C. water absorption
- D. enzyme secretion
Correct Answer: C
Rationale: The correct answer is C: water absorption. The large intestine's main function is to absorb water and electrolytes from the indigestible food residue that enters it from the small intestine. This process helps in the formation of solid feces. Nutrient absorption primarily occurs in the small intestine (A). Bile production is done by the liver and stored in the gallbladder, not in the large intestine (B). Enzyme secretion primarily occurs in the small intestine and other digestive organs, not in the large intestine (D). Therefore, C is the correct answer as it aligns with the main function of the large intestine.
A client has diarrhea due to a high carbohydrate and electrolyte content of the fluid in the tube feeding. Which of the following nursing actions will be most appropriate?
- A. Instructing the client to remain in a semi-Fowler's position
- B. Consulting the physician about decreasing the infusion rate
- C. Administering the tube feedings continuously
- D. Maintaining the tube patency
Correct Answer: B
Rationale: Reducing the infusion rate allows better absorption of nutrients and decreases the risk of osmotic diarrhea.
Which statement about the oral phase of digestion is INCORRECT?
- A. About 2% of the energy content of food is expended during the action of chewing and swallowing it.
- B. Swallowing involves contraction and relaxation of at least 14 groups of muscles in about 10 seconds in healthy subjects
- C. The biofilm covering tooth enamel contains several salivary and bacterial enzymes
- D. Salivary amylase digests the dextran film on tooth enamel formed from dietary sucrose
Correct Answer: D
Rationale: Correct Answer: D
Rationale: Salivary amylase primarily digests carbohydrates in the oral cavity, breaking down starch into simpler sugars like maltose. It does not directly target the dextran film on tooth enamel formed from dietary sucrose. This film is typically broken down by dental plaque bacteria, not salivary amylase. Therefore, option D is incorrect.
Summary of Incorrect Choices:
A: This statement is correct. Chewing and swallowing do require energy expenditure.
B: This statement is correct. Swallowing involves the coordinated action of multiple muscle groups.
C: This statement is correct. The biofilm on tooth enamel contains enzymes from both saliva and bacteria, contributing to oral digestion.