Davson and danielli hypothesis, the best examples can be the worst --because they're just so darn good.
Flippases and scramblases concentrate phosphatidyl serinewhich carries a negative charge, on the inner membrane. C Celery stalks that are immersed in fresh water for several hours become stiff and hard.
When the membrane is becoming more fluid and needs to become more stabilized, it will make longer fatty acid chains or saturated fatty acid chains in order to help stabilize the membrane.
The inner, plasma membrane is also generally symmetric whereas the outer membrane is asymmetric because of proteins such as the aforementioned.
The cell membrane consists primarily of a thin layer of amphipathic phospholipids that spontaneously arrange so that the hydrophobic "tail" regions are isolated from the surrounding water while the hydrophilic "head" regions interact with the intracellular cytosolic and extracellular faces of the resulting bilayer.
C A cell whose cytoplasm has a concentration of 0.
What will be the most probable result of this transfusion? It faces outwards, towards the interstitiumand away from the lumen.
After the system reaches equilibrium, what changes are observed? Good examples of bad examples The May ToK Subject report has come to the rescue, with a list of some common examples you might want to avoid. Like the ER, the outer membrane also possesses ribosomes responsible for producing and transporting proteins into the space between the two membranes.
B The molarity of glucose is higher in side A than in side B. Bloodletting as an example of an obsolete practice in medical science 7. The cell employs a number of transport mechanisms that involve biological membranes: As teachers we might see some of the same examples used every year.
C hypertonic to fresh water but hypotonic to the salt solution. A The molarity of sucrose and glucose are equal on both sides. Margaret Mead's perspective during fieldwork in Samoa 5.
Cell membrane Dating patient ethics form different types of "supramembrane" structures such as caveolapostsynaptic densitypodosomeinvadopodiumfocal adhesionand different types of cell junctions.
One important role is to regulate the movement of materials into and out of cells. If you do, just be sure to explain it very clearly and use it in a way that it helps you answer the prescribed title.
These two membranes differ in many aspects. This complex interaction can include noncovalent interactions such as van der Waalselectrostatic and hydrogen bonds.
Function A detailed diagram of the cell membrane Illustration depicting cellular diffusion The cell membrane surrounds the cytoplasm of living cells, physically separating the intracellular components from the extracellular environment.
Examples to Avoid in ToK Essays
Intracellular membranes The content of the cell, inside the cell membrane, is composed of numerous membrane-bound organelles, which contribute to the overall function of the cell.
Original "evidence" in your essays doesn't necessarily make them better essays, but it does suggest that you've taken some time with your research and not just using the first thing you found in a last-minute Google search.
C The water level is higher in side A than in side B. It's always more interesting when a student uses an example a quote, a story, a fact that we haven't heard of before.