Because the phospholipid molecules are free to move and the membrane is made of many different parts, the plasma membrane is said to be:
A fluid mosaic
A fatty acid
Which of the following is a function of the cell membrane?
Breaks down lipids, carbohydrates, and proteins from foods.
Stores water, salt, proteins, and carbohydrates.
Keeps the cell wall in place.
Regulates what materials enter and leave the cell.
Use this diagram of the Cell membrane to answer #3 and #4.
In the diagram above, structure B represents:
In the diagram above, this molecule aids in cell recognition...
The phospholipid bilayer describes a structure with:
Polar heads on the outside and non-polar tails on the inside.
Non-polar tails on the outside and polar heads on the inside.
Polar layers on both the inside and outside.
Non-polar layers on both the inside and outside.
If all materials were allowed to cross the cell membrane, then a cell’s contents would be the same as its surroundings. This does NOT happen because the cell membrane is:
A fluid mosaic
In dynamic equilibrium
Which phrase best describes the property of selective permeability?
some molecules pass
all molecules pass
all ions pass
large molecules pass
Cell that line your intestine take in some of the nutrients from the food you eat. However, the cells cannot absorb all of the molecules from food. These cells can take in some molecules but not others because cell membranes are
Draw a single phospholipid molecule and label the following: (1) head, (2) tail, (3) hydrophobic end, and (4) hydrophilic ends.
Label the cell membrane below using the following terms: (1) phospholipid, (2)
transport protein, (3) cholesterol,
(4) hydrophobic region, (5) hydrophilic region, (6) head, (7) tail,
(8) polar, (9) non-polar
Be VERY specific - circle items if necessary to make it very clear what you are
One of the functions of proteins in a cell membrane could be:
To allow larger molecules to pass through the cell membrane.
To make sugar for the cell.
To provide nutrients to phospholipids.
To transform light into usable energy.
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