Why are channels through membranes so important for nerve and muscle function? both nerves and muscles rely on the rapid transmission of information and of signals for movement. the diffusion of chemical signals over any significant distance would be too slow to cause muscle contractions quickly enough to deal with the challenges of moving a large body in a complex environment. electrical signals travel much more rapidly and the direction of the signal can be more easily controlled. the mechanism for generating and controlling electrical signals is the movement of charged material (ions) across cellular membranes in a limited area. the control of ion movement requires gated channels through the membrane that are specific for certain ions and either open or close (depending on the ion) in response to a change in electrical charge. view the animation below, then complete the quiz to test your knowledge of the concept?

The accompanying figure shows the percent of selected dna sequences that match between a chimpanzee and other primates. these data support the hypothesis that the figure shows the percentage of selected d n a sequences that match between the chimpanzee and other primates. the human has an almost 98 percent match, the gorilla has an almost 97 percent match, the orangutan has a 96 percent match, the gibbon has an almost 95 percent match, and the old world monkey has an almost 92 percent match. the accompanying figure shows the percent of selected dna sequences that match between a chimpanzee and other primates. these data support the hypothesis that the figure shows the percentage of selected d n a sequences that match between the chimpanzee and other primates. the human has an almost 98 percent match, the gorilla has an almost 97 percent match, the orangutan has a 96 percent match, the gibbon has an almost 95 percent match, and the old world monkey has an almost 92 percent match. chimpanzees and gibbons are the most closely related the chimpanzee's closest surviving relative is humans orangutans are the primates least closely related to chimpanzees old world monkeys and gibbons are the most closely related

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

How do the evolutionary chart and the video support the claim that all living things are made up of cells?