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The lipid bilayer is the barrier that keeps ions, proteins and other molecules where they are needed and prevents them from diffusing into areas where they should not be. They are impermeable to most water-soluble (hydrophilic) molecules.For example: most non-steroid hormones, glucose, insulin, and anything that can float freely in your blood stream without a transport protein.
What else can I help you with?
Chemicals that move in and out of cells by diffusion?
The cell cotains phospholipids ,proteins , and carbohydrates. Carbohydrates can be attached to either the phospholipids or the proteins in the cell membrane. Sometimes carbohydrates (sugars) are attached to cell membrane phospholipids and to cell membrane proteins
Which part of the molecules will face the air when a single layer of phospholipid molecules coats the water in a beaker?
The hydrophilic (polar) head of the phospholipid molecules will face the air, while the hydrophobic (nonpolar) tails will be oriented towards each other, forming a bilayer that shields the water inside the beaker.
What is a phospholipid bilayer and where would you find it?
Phospholipids are polymers made up of two fatty acids, glycerol, a phosphate group and a polar molecule. A cell's membrane consists phospholipids where they form two layers (with the polar molecules facing opposite ends) to separate the interior of the cell from the outside environment. This is called a phospholipid bilayer.
What impact does osmosis and diffusion have on life?
Osmosis and diffusion are essential biological processes that allow for the movement of important molecules such as water, ions, and nutrients into and out of cells. They help maintain proper cell function, hydration, and nutrient uptake, enabling organisms to survive and thrive. Any disruption in osmosis and diffusion can have detrimental effects on cells and organisms.
What do you call molecules that carry out most cell function?
You would call these molecules "proteins." Proteins are essential for various cellular functions such as metabolism, signaling, and structural support in cells.
Why is it important that phospholipids don't dissolve in water?
Since phospholipids make up cell membranes, it is important for them not to dissolve in water, because the internal and external environment of cells is aqueous. Without the phospholipid bilayer, the cells and their environments would just all dissolve into each other and there would be no cells.
Chemicals that move in and out of cells by diffusion?
The cell cotains phospholipids ,proteins , and carbohydrates. Carbohydrates can be attached to either the phospholipids or the proteins in the cell membrane. Sometimes carbohydrates (sugars) are attached to cell membrane phospholipids and to cell membrane proteins
Which molecule has hydrophilic and hydrophobic properties and would be found in plasma membranes?
Phospholipids have hydrophilic ("water-loving") heads and hydrophobic ("water-fearing") tails, which allow them to form the lipid bilayer of plasma membranes. This dual nature of phospholipids helps create a barrier that is selective about what can enter or leave the cell.
Would osmosis have a higher concentration of water molecules distilled water or red blood cells?
Distilled water would have a higher concentration of water molecules compared to red blood cells. Red blood cells have solutes dissolved in them, so they have a lower concentration of water molecules relative to distilled water. This concentration gradient would result in osmosis moving water into the red blood cells to equalize the concentrations.
Would iron be the trace element present in hemoglobin molecules in the red blood cells?
Yes.
What do surfactant allow to exist?
Surfactant molecules allow many things to exist. This would include alveoli in the lungs, and particles of colloidal dimensions, such as micelle.
What term best identifies the process used by cells to bring in large molecules?
This would probably be phagocytosis.
Which part of the molecules will face the air when a single layer of phospholipid molecules coats the water in a beaker?
The hydrophilic (polar) head of the phospholipid molecules will face the air, while the hydrophobic (nonpolar) tails will be oriented towards each other, forming a bilayer that shields the water inside the beaker.
What is found inside cells?
Cells membranes are made of a phospholipid bilayer. Phospholipids are tiny structures that have a hydrophilic (water-loving) "head" and a hydrophobic (fat-loving) tail. As i mentioned before, they are in a bilayer, so there are two rows of them that make up the membrane. The heads go towards the outside of the membrane, and the tails tend toward the fatty centre. Therefore, in the inside of cell membrane you would find lipids, or fats, and the "tails" of the phospholipids.
Does milk have chromosomes in its cells?
Milk itself has no cells. Milk is an emulsion of different proteins, fats, other phospholipids, sugars, and enzymes. The only thing cellular in milk would be bacterial contaminates. That's what pasteurization is for.
Can not getting enough oxygen kill your body cells?
Of course! Without enough oxygen your cells have nothing to bond the waste carbon molecules that it produces to. With the excessive amounts of carbon trapped in your cells your cells would die - as they would have no room to take in nutrients. Eventually you would die yourself, you would suffer escruciating pain (mostly in the form of headaches) as your cells died one by one.
Cone cells are color photoreceptors that use different retinal molecules to absorb different wavelengths of light?
While cone cells are the color photoreceptors in the eye, they use different opsin molecules for the absorption of different wavelengths of light. So the answer would be false.
