6. Would This Experiment Work With Other Plant Cells? What About With Animal Cells? Why Or Why Not?

Animal and plant cells are both surounded by a membrane. This membrane is selectively permeable, which means that some chemicals ( such as h2o and oxygen) can movement freely across the membrane, whereas other chemicals ( ofttimes big ones like proteins and Dna ) are blocked past the membrane.

The inside of a cell is mainly water, and in whatever liquid or gas the molecules are moving around at random. This billowy around means that molecules tend to spread out ( a elementary example of this is the smell of perfume spreading across a room).

Diffusion means this gradual spreading out of molecules from areas of high concentration ( the perfume bottle) to areas of lower concentration ( the room ). Another example of diffusion is ink gradually diffusing through a glass of water. The rate of improvidence depends on temperature: as the temperature increases, diffusion speeds up ( ink spreads quicker through hot water than cold h2o ).

Some chemicals, particularly ones with electrical charge such as sodium ions (Na⁺) or chloride ions (Cl^-), cannot diffuse through the membrane. Instead they move through protein channels ( like little holes in the membrane). This is called facilitated diffusion. Just like regular diffusion, no external free energy is required for this.

Osmosis is the diffusion of water through a membrane. The h2o always moves from a high concentration to a lower concentration. Information technology is very important in your body, because it controls the amount of water in your cells. For example, if you drink water, the water moves from the stomach to the blood, and finally the cells, by osmosis. Obviously you lot stop drinking when you are no longer thirsty, only animals are not always so lucky.
Some agricultural fairs take competitions for, say, the heaviest squealer, and occasionally people who are desperate to win volition have their pig and, right earlier the weighing, put a hose down its throat and fill its stomach with gallons of water to make the hog weigh more. This causes a rush of water past osmosis into the claret of the unfortunate creature, which is extremely painful, and can even kill the squealer.

Interestingly this technique of force feeding water to people was ane type of torture used in the 13th and 14th centuries by the Inquisition, and likewise reputedly past the Dutch ( the Dutch tourist board claims that Kingdom of the netherlands is now a very civilized nation, and tourists are unlikely to exist treated in this fashion ).
Although forcing people to beverage too much water is no longer common, at that place are cases where athletes drink too much water, and collapse or even die. Aye, that's correct, too much water can kill you lot!. But don't take my word for information technology, read this article from the New York Times:
When excess water tin kill a runner.

Coming back to osmosis, there are iii basic types of solution:

Isotonic solutions accept the aforementioned water concentration on both sides of the cell membrane. Blood is isotonic.

Hypertonic solutions accept less water ( and more than solute such every bit table salt or saccharide ) than a jail cell. Seawater is hypertonic. If you identify an fauna or a plant cell in a hypertonic solution, the cell shrinks, because information technology loses water ( water moves from a college concentration inside the cell to a lower concentration outside ). So if you go thirsty at the beach drinking seawater makes you even more dehydrated.

Hypotonic solutions have more water than a cell. Tapwater and pure h2o are hypotonic. A unmarried animal cell ( like a red blood cell) placed in a hypotonic solution volition fill up up with water and then outburst. This is why putting water on a bloodstained piece of clothing makes the stain worse. Institute cells have a prison cell wall around the outside than stops them from bursting, so a plant cell will neat up in a hypotonic solution, but volition not burst.

Source: https://web.fscj.edu/David.Byres/membrane1.html

Posted by: robertsrabing.blogspot.com

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