Materials that can cross the cell membrane include small non-polar molecules like oxygen and carbon dioxide, as well as small polar molecules like water. These molecules can freely pass through the lipid bilayer of the membrane due to their small size and compatibility with the hydrophobic environment of the lipid tails. However, larger molecules and charged ions require specific protein channels or transporters to cross the membrane.

The ABO blood group is determined by the presence or absence of specific antigen molecules on the surface of red blood cells. These antigens are determined by the inherited genes from our parents. There are three main types of antigens that determine the ABO blood group: A, B, and O. The combination of these antigens results in different blood types: A, B, AB, and O.

lipids, such as phospholipids. These lipids have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail, allowing them to form a bilayer structure that helps to retain the internal fluids of the cell. This lipid bilayer acts as a barrier to control the movement of substances in and out of the cell.

their hydrophobic nature and the fluidity of cell membranes. Lipids have a non-polar "tail" region that is attracted to other non-polar molecules, including the hydrophobic interior of the cell membrane. This allows lipids to move easily through the cell membrane, making it an important characteristic for various cellular processes.

The plasma membrane is able to self-assemble due to the properties of its constituent molecules, such as phospholipids. Phospholipids have hydrophilic heads and hydrophobic tails, which drives them to form a bilayer structure when exposed to water. This spontaneous assembly is driven by the hydrophobic effect and results in the formation of a stable and selectively permeable membrane.

Electrical or chemical signals may control the movement of ions across cell membranes. Ions are electrically charged particles that play crucial roles in various cellular processes. Electrical signals, such as action potentials, can trigger the opening or closing of ion channels to allow the movement of specific ions. Chemical signals, such as neurotransmitters, can also bind to receptors on the cell membrane to initiate a cascade of events that influence ion movement.

The Na concentration is higher outside of the neuron's plasma membrane, while the K concentration is higher inside the neuron's plasma membrane. This creates an electrochemical gradient that allows for the generation and transmission of electrical signals in neurons.

lipids.

The phospholipid bilayer is the primary structural component of the plasma membrane. It consists of two layers of phospholipids arranged with their hydrophilic heads facing outward towards the aqueous environment and their hydrophobic tails facing inward, creating a barrier that separates the interior of the cell from the extracellular environment. Therefore, the phospholipid bilayer forms the basis of the plasma membrane's structure and function.

The cell membrane is selectively permeable. It is also very flexible and contains many different substances within it and on it, such as various proteins, lipids, cholesterol, etc, nicknaming it the fluid mosaic model.

No, neutralizing chemicals is not a function of cell membranes in a cell. Cell membranes primarily serve as a barrier, regulating the entry and exit of substances to maintain the cell's internal environment. Neutralizing chemicals is a function typically performed by enzymes or other molecules within the cell's cytoplasm.

When salt is added to onion cell, the cytoplasm shrink due to plasmolysis.

When water is added to onion cell, the cytoplasm expands back to its initial shape due to deplasmolysis.

cell membrane is not a type of cell it is part of a cell,it is on the outside around an animal cell

cheek cells help to protect the upper jaw bone and, are also used to store un-needed fat.

The plasma membrane is formed primarily of a phosphor lipid bi-layer which can be saturated or unsaturated depending on the most profound fat ingested by the body. Composed of glycerol, phosphorus, and H2O (i think). Phosphor Lipids are commonly the only lipid found in the plasma membrane, however there are active protein channels and also passive channels activated by pressure formed by potassium inside the cell and sodium outside.

fluid mosaic

It's impossible.

The cell membrane is the outer boundary of animal cells and plant cells, but plant cells also have a cell wall to protect their cells. The cell membrane and cell walls are the outer boundaries of cells.

Plasma, in physics terms, is the fourth state of matter. It's form is similar to gas, but at extreme temperatures and energy, and shows the true colour of most elements when they are in their plasma form. Plasma is generally only found in the experimental Fusion reactors and in the stars themselves though due to the extreme requirements to create Plasma.

A cell membrane's function for an animal cell is, it gives the cell its shape, strength, holds cell together, and controls what goes in and out of the cell. For a plant cell it just, holds cell together, and controls what goes in and out of the cell.

Proteins, Carbohydrates, and Cholesterol. (Check out, 'fluid mosaic')

it made of layer lipid

it lets things in and out of the cell

The plasma membrane, or cell membrane, had many purposes, including:

-selective permeability (it controls what goes in and out of the cell)
-containing the cytoplasm (and therefore allowing chemical reactions to occur)
- offering limited protection to the cell, contrary to popular belief

why are cholesterol molecules important components of cell membranes