Answer:
E) Improve membrane fluidity
Explanation:
Cholesterol constitutes the basic structural element of the skeleton of cell membranes. Without their reinforcement, the membranes would become extremely fluid and lose their consistency. Cholesterol is found in the esterified membranes in its hydroxyl group (OH): with fatty acids, mainly oleic and linoleic, or as cholesterol sulfate. The cholesterol-sulfate polar group is disposed on one of the faces of the membrane that interacts with other polar groups in that area, while its bulky hydrophobic portion is embedded between the apolar parts of the lipids that form the membrane skeleton and They fulfill many other functions, among which the reduction in the permeability of protons and sodium ions, and their participation in signal transmission. Cholesterol is also essential in phagocytosis processes carried out by cells to capture many nutrients and, in general, for the function of cleaning up organic waste produced by macrophages.
The membranes must have a fluid structure so that the integrated proteins can move "horizontally" to interact with their ligands and with other proteins. The fluidity is given by unsaturated fat. With the excess of saturated fat, the membranes become rigid, but only with the necessary unsaturated fat the membranes are extremely fluid and very sensitive to temperature changes. Cholesterol stabilizes the structure of the membranes; In order for them to have the correct structure, they must have the correct proportions of saturated, unsaturated fats and cholesterol. The membranes produced in the laboratory without cholesterol are unstable to temperature changes, drastically modifying their fluidity against the small temperature changes that occur in the physiological range.
In addition to its functions in cell membranes, cholesterol is an important product that metabolism uses as a raw material to make other compounds:
*Bile salts
*Sex hormones
*Hormones of the adrenal cortex (corticosteroids)
*Vitamin D (Calciferol)
The major advantage that glucose oxidase method has over Fehling reagent for blood glucose measurement is that glucose oxidase method is specific for glucose measurement. The Fehling method gives positive result to glucose detection as well as for alcohols and aldehydes. This means that the test is not specific for glucose only. Also, the Fehling method can only be used in an alkaline environment.
<h3><em><u>Title: </u></em>The impacts lead to an affect from variations of changes that affected the ecosystem</h3>
<em><u>Intro:</u></em> The green world hypothesis proposes that the balance of predatory carnivores and herbivores prevents the destruction of plant life. Trophic cascade, an ecological phenomenon triggered by the addition or removal of top predators and involving reciprocal changes in the relative populations of predator and prey through a food chain, which often results in dramatic changes in ecosystem structure and nutrient cycling. A predator at the top of a food chain that is not preyed upon by any other animal an apex predator is usually defined in terms of trophic dynamics.Community, also called biological community, in biology, an interacting group of various species in a common location. The term biological community refers to all the living components in an ecosystem. Food Chain the sequence of transfers of matter and energy in the form of food from organism to organism. Food chains intertwine locally into a food web because most organisms consume more than one type of animal or plant.The carrying capacity of a biological species in an environment is the maximum population size of the species that the environment can sustain indefinitely, given the food, habitat, water, and other necessities available in the environment.
Resources: socratic.org, prezi.com, earthsky.org, www.merriam-webster.com.
I'm not sure what PT stands for in the Method section and i also don't know what i could put for results, discussion,. That is all stuff that is shown in the class, but if you can message me the video or anything i will be glad to look.