The level of organization one step more complex than the organ level is the______ level.
Fill in the blank(s) with the appropriate word(s).
organ system
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An enzyme that digests proteins into peptides is
A) lipase. B) amylase. C) nuclease. D) maltase. E) trypsin.
The adrenal medulla produces
A) mineralocorticoids. B) glucocorticoids. C) catecholamines. D) androgens. E) corticosteroids.
Which type of bone cells possess extensive ER and ribosomes?
A. osteocytes B. osteoblasts C. osteoclasts D. osteochondral progenitor cell
Osteogenesis imperfecta is
A. a disease in adults, especially women, characterized by a reduced amount of bone matrix. B. a disease in adults characterized by softening of bones resulting from calcium depletion. C. bone inflammation that often results from bacterial infection. D. a group of genetic disorders producing very brittle bones that are easily fractured; occurs because of insufficient collagen development. E. a disease in children characterized by soft, bowed, and swollen bones.