Which method of transport is responsible for low concentrations of sodium and high concentrations of potassium within the cells of the body?
a. simple diffusion
b. facilitated diffusion
c. vesicular transport
d. active transport
Answer: d. active transport
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Which one of the following is a type of species interaction with impacts that depend on prey density and effectiveness of defenses to determine the short-term impact on the prey population?
A) competition B) consumption C) mutualism D) commensalism
Around what percentage of all genes encode membrane proteins?
A. 0% B. 10% C. 25% D. 50% E. 75%
During cardiac arrest what event will occur? a. Pacemaker malfunctions
b. Electrical signaling is disrupted. c. Blood flow through the body stops. d. Heart stops beating. e. All of these choices.
Libbie Hyman's comprehensive study of invertebrates, beginning in the 1940s, was noteworthy for being one of the few major works at the time to ________
A) use Lamarckian evolution to explain the origins of animal phyla B) use cladistics to resolve invertebrate relationships C) integrate development with adult morphology to understand adaptation D) propose gene regulation as an explanation for development E) explain invertebrate evolution using "macromutations" with large effects