Tissue from which of the following is often poorly preserved in autopsy specimens, because it self-destructs soon after death due to post-mortem release of its stored secretory product of proteolytic enzymes?

Correct Answer: D

Rationale: The correct answer is D: pancreas. Pancreatic tissue is often poorly preserved in autopsy specimens due to the post-mortem release of its stored secretory product, which is a highly concentrated mixture of proteolytic enzymes. These enzymes can rapidly degrade the pancreatic tissue itself, leading to self-destruction soon after death. This phenomenon is known as autolysis. Submaxillary and sublingual glands (choice A), esophageal glands (choice B), and duodenal (Brunner's) glands (choice C) do not typically release such high concentrations of proteolytic enzymes upon death, leading to better preservation in autopsy specimens compared to pancreatic tissue.

Correct Answer: D

Rationale: The correct answer is D because epithelial cells lining striated intralobular ducts are usually simple cuboidal or columnar cells (A), have eosinophilic cytoplasm containing numerous mitochondria for energy production (B), and have basal cell membranes extensively folded to increase the surface area for active ion pump molecules (C). Choice A describes the cell morphology, choice B relates to cytoplasm content, and choice C pertains to membrane structure, all of which are characteristics of these cells. Therefore, selecting all three choices (D) accurately describes the features of epithelial cells in striated intralobular ducts.

Correct Answer: D

Rationale: The correct answer is D: absorbing nutrients. Enterocytes in the small intestine are primarily responsible for absorbing nutrients from digested food. They have specialized structures like microvilli to increase surface area for absorption. Choice A is incorrect because enterocytes do not secrete digestive enzymes; that is done by other cells in the small intestine. Choice B is incorrect because hormone secretion is mainly done by endocrine cells in the intestine. Choice C is incorrect because goblet cells are responsible for secreting mucus in the intestine, not enterocytes. In summary, enterocytes' main function is to absorb nutrients, not secrete enzymes, hormones, or mucus.

Correct Answer: D

Rationale: The correct answer is D: adipocyte. Adipocytes are not typical of lamina propria, which is a loose connective tissue found in mucous membranes. Adipocytes are fat cells, primarily found in adipose tissue, not in the lamina propria. Lymphocytes (A), fibroblasts (B), and macrophages (C) are all commonly found in the lamina propria. Lymphocytes are involved in the immune response, fibroblasts produce collagen and extracellular matrix, and macrophages are phagocytic cells that help in defense and tissue repair. In summary, adipocytes do not belong in the lamina propria as they are not typical connective tissue cells found in this specific tissue layer.

Correct Answer: D

Rationale: The intensely basophilic bodies in the epithelial lining of intestinal crypts represent condensed chromatin of mitotic figures. This is because during mitosis, chromatin condenses into visible bodies which are basophilic due to their high DNA content. These bodies are typically located towards the apical end of columnar cells where active cell division occurs. Explanation for the other choices: A: Mucus vesicles are typically seen as clear, not basophilic, in histological sections. B: Ribosomes are not typically visible as distinct bodies in H&E stained sections and are not basophilic. C: Chylomicrons are lipid droplets and are not basophilic bodies found in the epithelial lining.