2. when humans exhale, carbon dioxide leaves the body. describe where carbon dioxide comes from and how the human body expels it?

The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.

Which muscle cell structure stores calcium ions that are used to trigger the contraction?

Which step is the same in both forms of fermentation, as well as in cellular respiration?