Discussion topic

in some cases, people who test positive for
genetic testing can receive preventive
treatments. for example, people who test
positive for the breast cancer genes brca1
and brca2 can have a preventive
mastectomy (breast removal surgery) before
they develop the disease. in other cases, no
preventive treatments are available, but
frequent monitoring can detect a
disease earlier, when it's more easily treated.

what ethical or professional concerns does a
health-care professional need to address
when he or she has a patient who wants to
prematurely treat a genetic disease? do you
think genetic testing should be part of normal
preventive healthcare? why or why not?

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

answer: pee on jews

explanation: