Organisms sense and respond to changes both
inside and outside the body by way of
a. metabolism.
b. photosynthesis.
c. receptors.
d. catabolism.
e. anabolism.
C
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Pepsin is an enzyme that functions in the
stomach. Its optimum pH would be
a. between 1 and 2. b. between 3 and 4. c. above 6. d. between 5 and 7.5. e. above 8.5.
Which one of the following statements is TRUE regarding arterioles and arteries?
A) Arterioles and arteries transport blood from capillaries to veins. B) Blood pressure in arterioles is greater than the blood pressure in arteries. C) Arterioles are smaller and have less smooth muscle than arteries. D) Arteries do not contain valves, whereas arterioles do. E) Small sphincter muscles regulate the flow of blood from arteries into arterioles.
True or False: Frogs have evolved highly specific sensory receptors for different components of their own species-specific calls; in fact, each auditory nerve is "tuned" to be maximally responsive to distinct features of the call
A. true B. false
For more serious infections caused by Acinetobacter spp., such as pneumonia or bacteremia, effective treatment may require the use of:
a. multiple rounds of penicillin or a similar antibiotic. b. a <-lactam agent in combination with an aminoglycoside antibiotic. c. repeated high-level doses of gentamycin. d. single-drug therapy in combination with a steroid.