HeLp Me!! PlEaSe You would be my savior of the day!!!((:?

1) describe the electrical charge inside and outside a typical cell. Then Explain how this affects an ion's ability to move into the cell



2) Suppose you have to explain a concentration gradient to some. Create a scenario that illustrates passive transport down concentration gradient.



3) Name three transports processes in cells that do not require energy, and briefly describe how each of them works



4) using your understanding of osmosis, describe why putting salt on a pork chop before cooking it on a grill is likely to result in a dry, tough piece of meat.HeLp Me!! PlEaSe You would be my savior of the day!!!((:?
1. I'm not sure what the charge itself is, but the idea they want you to get to is that cell membranes contain a charge gradient because the inside and outside of a cell differ in their charge. This means some ions will flow down that gradient (and have very easy access to the cell interior/exterior depending on their charge) and others, who have similar charges to those of the cell would not and would have to be actively transported in. (so, for example, if the cell is positively charged, other positively charged ions would be repelled-like repels like when it comes to charge...think of a magnet). For the record, this isn't exactly how it works in biochemistry, but for your assignment I think it would be over your head to go into more detail.



2. A concentration gradient exists because things in nature want to equalize. If you have a dam in front of a reservoir, there is a HUGE amount of water behind the dam, and very little in front of it (think of the Hoover dam, with Lake Mead behind it). The water behind the dam very badly wants to flow through it but cannot, because the dam is obviously solid. But if it could, it would flow through until the volume of water on both sides of the dam is equal.



The same principle applies in a cell. If you have a cell with very few, say, Na+ molecules inside, and a TON of Na+ outside. Those on the outside want to flow into the cell, until they reach an equal concentration on both sides.



3. Diffusion, passive channel transport...and I'm not sure on a third one. You can look up the definitions for them, they will describe what they are.



4. High salt concentration outside of the meat cells causes them to release water to equilibriate the salt concentration on both sides of the cell (in effect, concentrating their interior).





As an annoying etiquette rule, I would suggest you 1) phrase your questions better in the future (saying HELP ME PLEASE! does nothing to tell people what your question is actually about) and 2) don't capitalize letters in the middle of a word. It looks stupid.