Which of the following is most likely to be responsible if, when your blood sugar level rises, the level of sugar goes back down to a set point?
A) a malfunction in a homeostatic mechanism based on negative feedback
B) a homeostatic mechanism based on negative feedback
C) a malfunction in a homeostatic mechanism based on positive feedback
D) a homeostatic mechanism based on positive feedback
Answer: B
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Dissimilatory nitrate reduction results in the production of gaseous products, while assimilatory nitrate reduction results in the production of ammonia for biosynthesis
Indicate whether the statement is true or false.
A four-chambered heart, hollow limb bones with supporting struts, and a keeled sternum are features
associated with most modern
a. mammals. b. snakes. c. turtles. d. lizards. e. birds.
The Carboniferous period included
A. the development of large coal beds. B. flying insects with wing spans up to 75 centimeters. C. ferns and early plants that grew up to 40 meters in height. D. All of the answer choices are correct. E. sediment-dwelling invertebrates.
Which of the following streptococci is associated with dental caries?
A. viridans streptococci B. Streptococcus pyogenes C. Streptococcus pneumoniae D. Streptococcus equisimilis E. Streptococcus arginosus