Which of the following would result in elevated heart rate?
A. hypothyroidism
B. hyperthyroidism
C. hyperparathyroidism
D. hypoparathyroidism
E. hypoadrenalism
B. hyperthyroidism
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A DNA similarity of 75% between two organisms
A. suggests the organisms are very closely related at the species level. B. suggests the organisms are not related. C. suggests the organisms may or may not be related. D. means the GC content is 45%.
Arrival of an action potential at a presynaptic cell’s
axon terminals triggers the release of __________, a type of chemical signal. Fill in the blank(s) with the appropriate word(s).
Unikonts are characterized by having:a
two centrioles. b. one flagellum. c. cell walls of chitin. d. micronuclei. e. cell walls of silica.
Sulfanilamide is an antimicrobial drug that mimics the shape of an important substrate for a particular bacterial enzyme, thereby inhibiting the enzyme. This type of inhibition is known as
A) allosteric inhibition. B) competitive inhibition. C) allosteric activation. D) noncompetitive inhibition. E) feedback inhibition.