The cell membranes are made of lipids that do not mix with water.
Explanation:
Cells in the body are made up of a plasma membrane which is made up of phospholipids that have hydrophilic heads that dissolve in water and hydrophobic tails that do not dissolve in water. The membrane is a bilayer wherein the hydrophilic heads faces the aqueous environment both inside and outside the cells while the hydrophobic tails faces each other and cluster up preventing solubility in water.
The attraction of the hydrophilic heads to the water inside and outside of the cell and clustering of the hydrophobic tails together and avoiding mixing with water keeps the cell membrane in place.
The cell membranes are made of lipids that do not mix with water.
Explanation:
Cells in the body are made up of a plasma membrane which is made up of phospholipids that have hydrophilic heads that dissolve in water and hydrophobic tails that do not dissolve in water. The membrane is a bilayer wherein the hydrophilic heads faces the aqueous environment both inside and outside the cells while the hydrophobic tails faces each other and cluster up preventing solubility in water.
The attraction of the hydrophilic heads to the water inside and outside of the cell and clustering of the hydrophobic tails together and avoiding mixing with water keeps the cell membrane in place.
C. Cell membranes are composed of a lipid bilayer.
Explanation:
The cell membrane delimits the contents of the cell. A typical cell membrane is largely made up of phospholipids. Other components include the glycolipids, sterols, and proteins. The phospholipids component arrange themselves in a double layer (bilayer), forming a hydrophobic core.
Fat soluble molecules are able to permeate across the cell membrane due to the lipid bilayer components - lipid in itself being a form of fat.
B). Cell membranes are composed of a lipid bilayer.
Explanation: A membrane is a lipid bilayer that surrounds the cell. Lipids have two parts: the fatty acid chain (the tail) and the phosphate group (the head).
The phosphate head groups are polar, face outward and interact with the outside environment of the cell. The fatty acid chain is hydrophobic and nonpolar, face each other in the bilayer thus forming a hydrophobic fluid interior.
The hydrophobic nature of the bilayer interior makes the membrane to permit only nonpolar and hydrophobic molecules to pass through the cell membrane. This is the reason the membrane allows only molecules that dissolve in the lipid bilayer to pass through to enter or leave the cell.
The answer to your question is: A. Has few interaction with water
Explanation:
As you can read in the question and see in the picture, phospholipid is formed by to parts:
A head that is polar, that means it prefer to interact with polar substances like water.
A tail: that is non polar, that means it doesn't interact with polar substances, then, they only interact with non polar substances.
In the cell membrane, the heads of the phospholipids are in the borders and the tails are inside. Membrane is like a sandwich where the breads would be the heads and the content (ham, etc) would be the tails.
The answer to your question is: A. Has few interaction with water
Explanation:
As you can read in the question and see in the picture, phospholipid is formed by to parts:
A head that is polar, that means it prefer to interact with polar substances like water.
A tail: that is non polar, that means it doesn't interact with polar substances, then, they only interact with non polar substances.
In the cell membrane, the heads of the phospholipids are in the borders and the tails are inside. Membrane is like a sandwich where the breads would be the heads and the content (ham, etc) would be the tails.
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