All of the following are characteristics of an epithelium except:
a. It is selectively permeable.
b. It may form exocrine glands.
c. Its cells are highly regenerative.
d. It contains abundant blood vessels.
d. It contains abundant blood vessels.
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Epithelium is connected to underlying connective tissue by
A) keratin. B) interfacial canals. C) a basement membrane. D) a reticular lamina. E) proteoglycan.
Which accurately describes the handling of urea by the kidney?
A. All of the urea that reaches the kidney is excreted in the urine. B. About half of the urea that is filtered is excreted in the urine. C. None of the urea that reaches the kidney is excreted in the urine.
Antibodies typically act extracellularly in body fluids and are therefore considered part of the humoral branch of adaptive immunity
Indicate whether the statement is true or false
Why is someone recovering from a broken bone told to avoid eating spinach?
A. Spinach binds to, and removes, vitamin C from the bloodstream. B. Spinach inhibits collagen formation. C. Spinach interferes with calcium absorption. D. Spinach inhibits osteoclasts.