The nurse is caring for a patient who has been prescribed digoxin. Which statement by the patient indicates the need for further teaching about the medication?

Correct Answer: C

Rationale: The correct answer is C. This statement indicates a need for further teaching because stopping digoxin abruptly can be dangerous. Digoxin should not be discontinued without consulting a healthcare provider. A: Monitoring pulse rate is important as digoxin can affect heart rate. B: Consistency in timing helps maintain consistent drug levels. D: Monitoring weight is crucial as digoxin can cause fluid retention. Therefore, choice C is incorrect as it suggests a potentially harmful action.

Correct Answer: B

Rationale: The correct answer is B: chief cells. Chief cells are responsible for secreting pepsinogen in the stomach. Pepsinogen is an inactive form of pepsin, which is an enzyme that helps in protein digestion. Parietal cells secrete hydrochloric acid, not pepsinogen. Mucous neck cells secrete mucus to protect the stomach lining. Enteroendocrine cells secrete hormones like gastrin, but not pepsinogen. Therefore, the correct answer is B as chief cells are the specific cells that secrete pepsinogen in the stomach.

Correct Answer: B

Rationale: The correct answer is B: mechanical digestion. Teeth play a crucial role in breaking down food into smaller pieces through physical chewing, which is a form of mechanical digestion. This process increases the surface area of food particles, making it easier for enzymes to further break down nutrients during chemical digestion in the stomach and intestines. Choice A (chemical digestion) is incorrect because teeth do not directly participate in chemical breakdown of food. Choice C (enzymatic digestion) is incorrect as enzymes are not produced by teeth but by salivary glands and other digestive organs. Choice D (absorption) is incorrect as teeth are not involved in absorbing nutrients; absorption primarily occurs in the small intestine.

Correct Answer: C

Rationale: The correct answer is C: Digesting proteins. Pepsin is a digestive enzyme produced in the stomach that specifically breaks down proteins into smaller peptides. It works optimally in acidic environments, aiding in the digestion of proteins consumed in the diet. The other choices are incorrect because pepsin does not play a role in digesting carbohydrates (A), fats (B), or nucleic acids (D). Carbohydrates are primarily broken down by enzymes like amylase, fats by lipase, and nucleic acids by nucleases. Thus, pepsin's main function is to digest proteins in the stomach.

Correct Answer: B

Rationale: The correct answer is B: Hyperplasia of gastric mucosal lymphocytes. In a tumor producing large amounts of gastrin, hyperplasia of gastric epithelium (choice A) is expected due to increased gastrin stimulation. Excessive gastric acid secretion (choice C) is also expected as gastrin stimulates acid production. Histamine secretion in the gastric mucosa (choice D) can occur as histamine is released in response to gastrin. However, hyperplasia of gastric mucosal lymphocytes (choice B) is not a direct consequence of increased gastrin levels. Lymphocyte hyperplasia is more commonly associated with chronic inflammation or infection rather than gastrin overproduction.