The nurse is caring for a patient with a history of heart failure. Which statement by the patient indicates that further teaching is needed?

Correct Answer: B

Rationale: The correct answer is B because increasing salt intake can worsen heart failure by causing fluid retention and increasing blood pressure. A is correct because shortness of breath is a common symptom of heart failure. C is incorrect because limiting fluid intake is important to prevent fluid overload in heart failure. D is correct as daily weight monitoring can help detect fluid retention early. Therefore, B is the only statement that goes against heart failure management principles.

Correct Answer: C

Rationale: The correct answer is C: gallbladder. Bile is produced by the liver and stored in the gallbladder. When we eat, the gallbladder releases bile into the small intestine to aid in the digestion of fats. The pancreas produces digestive enzymes, not bile (A). The liver produces bile but does not store it (B). The small intestine is where bile is released, not stored (D). Therefore, the gallbladder is the correct location for bile storage.

Correct Answer: B

Rationale: Water is absorbed in the stomach through a process called osmosis, where water molecules pass through the stomach lining into the bloodstream. Vitamins are primarily absorbed in the small intestine, while carbohydrates and proteins are broken down in the stomach but absorbed in the small intestine. Water is the only substance among the choices that undergoes absorption directly in the stomach due to its small molecular size and the body's constant need for hydration.

Correct Answer: B

Rationale: The main function of the gallbladder is to store bile produced by the liver and concentrate it. When we eat, the gallbladder releases bile into the small intestine to help with the digestion of fats. Storing bile allows for a controlled release when needed. Choice A is incorrect because bile is produced by the liver, not the gallbladder. Choice C is incorrect as digestive enzymes are mainly produced by the pancreas. Choice D is incorrect as nutrient absorption primarily occurs in the small intestine, not the gallbladder.

Correct Answer: B

Rationale: The correct answer is B: Control centers in the medulla oblongata. The myenteric plexus is part of the enteric nervous system located in the gastrointestinal tract, involved in regulating gut motility. Sensory neurons (A), motor neurons (C), and synapses (D) are essential components of the myenteric plexus, responsible for sensing stimuli, transmitting signals, and coordinating muscle contractions in the gut. Control centers in the medulla oblongata are part of the central nervous system, not directly related to the myenteric plexus functions. Thus, choice B is incorrect in the context of the components of the myenteric plexus.