Cell membrane and homeostasis? ?
A cell membrane does not actually maintain homeostasis by itself. The term homeostasis refers to maintaining a relatively stable internal environment inside of a multi-cell organism. Since the internal environment is the interstitial fluid that is around each and every cell, then homeostasis has more to do with what is outside of a cell than what is inside of it. It may help to think of each cell in our bodies as individual cells swimming in a huge, and very crowded, ocean called interstitial fluid. Each cell wants the ocean around it to be just the right temperature, have all the necessary nutrients it needs, and be able to carry away its waste products. So cells communicate their needs to each other mainly through their cell membranes by releasing chemical messengers that, ultimately, tell the hypothalamus gland in the brain that a change needs to be made in the interstitial fluid. Since it is the ruler of homeostasis, the hypothalamus sends neural and chemical signals to other glands, tissues, organs, and organ systems to adjust the internal environment, the interstitial fluid, so that it is more suitable for all the cells at that particular time. And since we are always changing what we are doing, homeostasis needs to change along with our activities, both day and night. This constantly changing internal environment is the process of homeostasis. The barrier is selectively permeable and able to regulate what enters and exits the cell, thus facilitating the transport of materials needed for survival. The movement of substances across the membrane can be either passive, occurring without the input of cellular energy, or active, requiring the cell to expend energy in moving it. Functions of membrane proteins include: Transport of substances across membranes Enzymatic activity (e.g., smooth endoplasmic reticulum Signal transduction (e.g., cell communication) Intracellular joining (See Figure 7.30, Intercellular junctions in animals) Cell-cell recognition (e.g., cell communication) Attachment to the cytoskeleton and extracellular matrix
In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should?
In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? isotonic to each other intracellular should be hypertonic to extracellular intracellular and extracellular should both be hypertonic intracellular should be hypotonic to extracellular
What is the difference between extracellular fluid and intracellular fluid?
The key difference is in the name. Intracellular fluid is the fluid within a cell, such as the cytoplasm. Extracellular fluid is outside of the cell, which there are numerous types in connective tissue. Some examples include cerebrospinal fluid, blood serum, and stomach acid. Intracellular fluid is generally filled with the proteins and molecules that characterize the function of the cell. Extracellular fluid often is more indicative to the function of the organ and is filled with signal molecules to inform the cell what to do. Obviously, much of what makes extracellular fluid specific to each circumstance was produced in the cell’s intracellular fluid. If you have a more particular difference between the two you would like to know, just leave a comment below. I hope this helps.
Which of the following is considered to be the body's "internal environment" when discussing homeostasis?
A) intracellular fluid B) plasma C) interstitial fluid D) hormones E) lypmph The question doesn't make sense to me; I would consider them all in the internal enviroment. Help!
What are the most important characteristics of cell membrane?
The cell membrane, also called the plasma membrane, has the following characteristics:-It is present as the outermost layer in animal cells and lies below the cell wall in plant cells.The cell membrane surrounds the cytoplasm of living cells, physically separating the intracellular components from the extracellular environment.The cell membrane is semi-permeable, ie, it allows some substances to pass through it and does not allow others.It is thin, flexible and a living membrane, which consists of a lipid bilayer with embedded proteins/The cell membrane has large content of proteins, typically around 50% of membrane volume. These proteins are important for cell because they are responsible for various biological activities.
HELP PLEASE: Explain how the concentration of cell ions allows a plant to take up water?
Water (via osmosis) likes to dilute out solutes. So, water will move towards the place that has the higher concentration of solute (in this case, ions). The root has a higher concentration of solutes than the soil, so the water moves into them.
If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular flu?
If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. What do you predict will happen to the person’s cells? Extracellular fluids do not impact cell size, because cells contain intracellular fluid. The cells will lose water and shrink. The cells will rupture. The cells will swell.
If a person takes concentrated solution of salt, and after sometime, he starts vomiting. What is the phenomenon?
Your body is trying to maintain its electrolyte homeostasis. The vomiting is protective. Too much salt in your blood and intercellular fluids will create an imbalance between the ions within and outside your cells. The latter become hypertonic and will, in the extreme, shrivel up.One of the other major consequences could be a fatal cardiac arrhythmia.So why are you consuming volumes of unnaturally salty solution ? Are you trying to pickle yourself from the inside out?
What is the science of dry fasting for longer than 48 hours?
You asked,What is the science of dry fasting for longer than 48 hours?Let’s clarify first:Science is primarily concerned with finding out what is repeatable that works in real life and doing it. It is practical for getting the things done you want done.Academia is primarily concerned about the theory of why things work, not how to do it, regardless if they can or can’t do it in real life. It is practical for explaining why you choose to do something…The practice of dry fasting brings an experience of acceleration of the benefits of fasting, i.e. get the same fasting benefits in a few days that would typically take longer in regular water fasting,The theory of dry fasting is the body will more rapidly accelerate ketosis in order to obtain internal water and hydration from stored adipose tissue conversion into ketones and free fatty acids. This internal hydration happens in regular fasting, but at much slower rates.Dry fasting works. Period.Regular fasting works. Period.I do not recommend novices, or people who have never fasted, to start by dry fasting.I’m a veteran fasting practitioner and just finished a week-long fast yesterday, of which the first five days were dry fasting (i.e. I started drinking only water on the 6th day). The therapeutic effects were superior and I had a comfortable experience because I know what I’m doing, have fasted before (e.g. 28 day fast and hundreds of shorter fasts) and understand how to break fasts correctly in all circumstances.Fasting is not a competition: start slow and learn by deliberate, methodical and focused direct experience – not theory.Your body and mind will be eternally grateful…
How does flexibility of plasma membrane help the cells?
Hi,I think you want know that What effect does the physical state of the lipid bilayer have on the biological properties of the membrane?Membrane fluidity provides a perfect compromise between a rigid, ordered structure in which mobility would be absent and a completely fluid, nonviscous liquid in which the components of the membrane could not be oriented and structural organization and mechanical support would be lacking.In addition, fluidity allows for interactions to take place within the membrane.For example, membrane fluidity makes it possible for clusters of membrane proteins to assemble at particular sites within the membrane and form specialized structures, such as intercellular junctions, light-capturing photosynthetic complexes, and synapses.Because of membrane fluidity, molecules that interact can come together, carry out the necessary reaction, and move apart.Fluidity also plays a key role in membrane assembly, Membranes arise only from pre existing membranes, and their growth is accomplished by the insertion of lipids and proteins into the fluid matrix of the membranous sheet.Many of the most basic cellular processes,including cell movement, cell growth, cell division, formation of intercellular junctions, secretion, and endocytosis, depend on the movement of membrane components and would probably not be possible if membranes were rigid, nonfluid structures.Reference - Geral Karp “ Cell and molecular biology” 7th edition.