Which of the following will NOT occur in response to a decrease in the extent of stretch detected by a baroreceptor?
A) increased ventricular contractility
B) increased urine flow
C) increased peripheral resistance
D) increased venomotor tone
E) increased heart rate
Answer: B) increased urine flow
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All of the following must be overcome by an opportunistic fungal species as it attempts to establish infection in a new host EXCEPT
A. immune factors such as IgA, complement, and white blood cells. B. non-optimal pH for fungal growth. C. presence of nutrients. D. the presence of normal microbiota.
Control of a physiological state by a negative feedback loop differs from control by a positive feedback loop in that only in the case of negative feedback
a. does the physiological state tend to remain close to constant. b. does an effector respond to change by increasing output. c. is the effector controlled by some form of sensory input. d. is the response likely to be helpful to an organism's fitness. e. c and d.
Which of the following is the least important characteristic that geneticists look for in a model organism?
A) ease of cultivation B) rapid reproduction C) small size D) small genome
Based on von Frisch's work on honeybee communication, which type of information is communicated to other workers by a honeybee's "dance"?
A) the direction of the nectar source B) the distance of the nectar source from the nearest water C) the color of the flowers producing the nectar D) the quality of the nectar