Duodenal endocrine cells
A) carry products of digestion that will not pass through the walls of blood capillaries.
B) produce new cells for the mucosa of the small intestine.
C) function in the absorption of nutrients, especially vitamin B12.
D) secrete hormones that coordinate the activities of other digestive organs.
E) secrete a watery intestinal juice that includes intrinsic factor and hydrochloric acid.
D) secrete hormones that coordinate the activities of other digestive organs.
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The respiratory membrane consists of
A) two thicknesses of epithelial cells and basement membranes. B) two thicknesses of epithelial cells. C) a single thickness of epithelial cells. D) a single thickness of epithelial cells and a basement membrane.
Glucose transported via the GLUT carrier is characterized as ________.
A. receptor-mediated endocytosis B. passive transport C. co-transport D. active transport
The point where separation of the DNA occurs is called the replication fork.
a. true b. false
The names of the muscles can indicate all of the following except
A) the angle of the muscle relative to the long axis of the body. B) the action of the muscle. C) the location of the muscle. D) structural characteristics of the muscle. E) collagen content of the muscle.