Concerning cholecystokinin (CCK):

Correct Answer: B

Rationale: Certainly! The correct answer is B: Cholecystokinin (CCK) stimulates the contraction of the gallbladder. This hormone is released from the duodenum in response to the presence of fats and proteins in the small intestine. Its main function is to signal the gallbladder to contract and release bile into the duodenum to aid in the digestion and absorption of fats. A: CCK is not secreted from the jejunum but from the duodenum. C: CCK does not inhibit stomach motility; instead, it enhances the release of digestive enzymes and bile. In summary, choice B is correct as it accurately reflects the role of CCK in stimulating gallbladder contraction, while choices A and C are incorrect based on the functions of CCK in the digestive system.

Correct Answer: B

Rationale: The correct answer is B: Serosa. The serosa is the outermost layer of an organ lying within a body cavity. It is composed of connective tissue covered by a layer of mesothelium. This layer is farthest away from the inner core or lumen of the organ. The muscularis externa (choice A) is the layer of muscle tissue located just beneath the serosa. The mucosa (choice C) is the innermost layer of the organ, lining the lumen. The myenteric plexus (choice D) is a network of nerve fibers located between the circular and longitudinal layers of the muscularis externa, playing a role in regulating gastrointestinal motility.

Correct Answer: D

Rationale: The final product of carbohydrate digestion in the small intestine is glucose. Carbohydrates are broken down into simple sugars like glucose during digestion. Enzymes in the small intestine, such as amylase, break down complex carbohydrates into glucose molecules, which can then be absorbed into the bloodstream for energy. Fatty acids (A) are the final product of lipid digestion, while amino acids (B) are the final product of protein digestion. Choice C is irrelevant. In summary, glucose is the correct answer as it is the end product of carbohydrate digestion, while the other choices are related to different types of digestion products.

Correct Answer: D

Rationale: The correct answer is D. A serum potassium level of 2.9 mEq/L indicates hypokalemia, which can be life-threatening. Hypokalemia can lead to cardiac arrhythmias and muscle weakness. It is crucial to report this finding promptly to the healthcare provider for immediate intervention. Choice A is relevant but not as urgent as hypokalemia. Choice B is unrelated to electrolyte disorders. Choice C is incomplete and does not provide any relevant information.

Correct Answer: A

Rationale: Rationale for Correct Answer (A): The statement "I can take a shower and walk around the house tomorrow" indicates an understanding of post-operative activity expectations. After a laparoscopic cholecystectomy, early ambulation is encouraged to prevent complications like blood clots. Additionally, showering promotes wound healing and hygiene. Incorrect Choices: B: "I need to limit my activities and not return to work for 4 weeks" - This choice is incorrect as it overestimates the recovery time for a laparoscopic cholecystectomy, which typically allows for a quicker return to normal activities. C: "I can expect yellowish drainage from the incision for a few days" - While drainage is common after surgery, the color and duration mentioned are not typical for this procedure. D: "I will follow a low-fat diet for life because I do not have a gallbladder" - Following a low-fat diet is recommended after surgery, but the statement is too extreme as dietary