Which of these processes occurs throughout most of the alimentary canal?

Correct Answer: B

Rationale: The correct answer is B: propulsion. Propulsion is the process of moving food along the alimentary canal through peristalsis, which is the contraction and relaxation of muscles in the digestive tract. This process occurs throughout most of the alimentary canal, including the esophagus, stomach, small intestine, and large intestine. Ingestion (choice A) occurs at the beginning of the digestive process when food enters the mouth. Segmentation (choice C) is a mixing movement that occurs mainly in the small intestine to aid in digestion. Absorption (choice D) takes place primarily in the small intestine, where nutrients are absorbed into the bloodstream. Therefore, propulsion is the correct answer as it is the continuous movement of food along the digestive tract.

Correct Answer: B

Rationale: The correct answer is B: Use a mild soap and water to clean the skin around the stoma. This is because gentle cleansing helps prevent skin irritation and infection. Cleaning with harsh products can damage the skin. Choice A is incorrect because skin barrier products are essential for protecting the skin. Choice C is incorrect as alcohol wipes can be too harsh and drying for the skin. Choice D is incorrect because ostomy appliances typically do not need to be changed daily unless there are specific issues.

Correct Answer: D

Rationale: The correct answer is D because consuming contaminated shellfish can lead to Hepatitis A infection. It is important to ask about dietary habits to identify potential sources of infection. Choice A is incorrect as it assumes drug use, which may not be relevant to the patient. Choice B is more focused on sexual behavior rather than Hepatitis transmission. Choice C is irrelevant unless there was a known Hepatitis outbreak in Canada.

Correct Answer: A

Rationale: The majority of chemical digestion in the stomach occurs in the fundus and body regions. These areas contain gastric glands that secrete hydrochloric acid and pepsinogen, which break down proteins. The fundus and body also mix and churn food to create chyme. The cardia and pylorus do not play a significant role in chemical digestion. The cardia is the entry point of the stomach and mainly responsible for food entry, while the pylorus regulates the release of chyme into the small intestine. The body region alone does not have as many gastric glands compared to the fundus and is mainly involved in mixing and storing food.

Correct Answer: C

Rationale: The correct answer is C because the enteric nervous system is a complex network of neurons that controls digestion independently of the brain. It regulates gastrointestinal functions such as peristalsis, secretion of digestive enzymes, and blood flow. This system can operate autonomously but is also influenced by the central nervous system. Choices A, B, and D are incorrect because the enteric nervous system is not responsible for controlling voluntary movements, regulating hormone secretion, or controlling respiratory functions.