Which statement best summarizes the difference between ectothermic and endothermic organisms?
A) Ectotherms are warm-blooded, but endotherms are cold-blooded.
B) Endotherms control their temperature, but ectotherms have no control over their temperature.
C) Ectotherms absorb external heat, but endotherms use metabolic heat to maintain a warm, steady body temperature.
Answer: C
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The reduction in organ blood flow that results from a decrease in mean arterial pressure would be exacerbated by the ________ that occurs as a consequence of the baroreceptor reflex.
A) increased stroke volume B) increased venous return C) decreased compliance of the veins D) increased ventricular contractility E) increased peripheral resistance
Actin filaments associate with a nucleotide triphosphate.
a. true b. false
Which lineage includes lizards and snakes?
a. Sphenodontia b. Squamata c. Testudines d. Archosauromorpha
Which of the following substances contributes to the edema associated with inflammation?
A) leukotrienes B) histamine C) interferon D) defensin E) both leukotrienes and histamine