An epithelium whose cells are tall and narrow, with each one touching the basement membrane and reaching the apical surface, is called ________ epithelium.
A. simple columnar
B. stratified squamous
C. pseudostratified columnar
D. simple cuboidal
E. stratified cuboidal
Answer: A
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In bone, the calcium phosphate forms crystals of
A) osteoid matrix. B) calcium carbonate. C) hydroxyapatite. D) calcitriol. E) proteolytic enzymes.
Functionally, carbohydrates are most important as
A) storage of glucose molecules. B) a part of nucleic acid structure. C) sources of energy. D) receptors of the cell surface. E) insulation under the skin.
The _________________________ can be considered a supplement to the circulatory system.?
Fill in the blank(s) with correct word
Enzyme regulation by negative feedback involves
A. allosteric facilitation of an enzyme by a substrate of its metabolic pathway. B. occupation of the active site of an enzyme so that it catalyzes less efficiently. C. allosteric inhibition of an enzyme by a product of its metabolic pathway. D. allosteric modification of a substrate by an enzyme of an alternate metabolic pathway. E. enhancement of the active site by a negatively charged substrate.