The muscular layer farthest from the lumen is (the)
A) oblique layer of the muscularis externa.
B) muscularis mucosae.
C) circular layer of the muscularis externa.
D) longitudinal layer of the muscularis externa.
E) None of the answers are correct.
D) longitudinal layer of the muscularis externa.
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Lymph nodes can be described as ________.
A. small, encapsulated bodies B. patches of cytokines C. immature antibodies D. organelles of immunity
If the pancreatic duct was obstructed, you would expect to see elevated blood levels of
A) bilirubin. B) amylase. C) cholecystokinin. D) secretin. E) gastrin.
What special characteristic of the respiratory membrane facilitates gas exchange?
A. The large surface area of the combined alveoli facilitates gas exchange. B. Smooth muscles in the walls of the alveoli hold the alveoli open to increase lung volume and surface area. C. The presence of alveolar macrophages and mucus keep the alveoli clear and reduce membrane thickness. D. Cartilages in the walls of the alveoli hold the alveoli open to increase lung volume and surface area.
The guarding reflex prevents voiding.
Answer the following statement true (T) or false (F)