The main purpose of moving materials inside and outside the cell through the cell membrane is to create balance. What term do biologists use for “balance” in a cell?

The sodium-potassium pump regulates the amount of sodium and potassium inside of cells, particularly nerve and muscle cells. In this process, an ATP molecule is used for energy, causing three sodium ions to be pumped out and exchanged for two potassium ions, which are pumped in by a membrane protein. Both ions go against their concentration gradients. The sodium-potassium pump is an example of:

In the image on the right, the cell is taking in substances through membrane proteins, without any energy of its own. The substances naturally follow their concentration gradient. However, they must go through the protein channels, because they are too large to squeeze through the cell membrane. This process is called:

This component of the plasma membrane is used for cellular identification and communication inside living organisms.

This component of the plasma membrane provides a pathway for large molecules to cross.

This component of the plasma membrane helps with strength and flexibility, so the cell doesn't fall apart.

When water moves equally into and out of a cell it is in which type of solution?

A cell is placed in a solution with 90% salt. The cell contains only 10% salt. The type of solution the cell has been placed in is:

A plant cell contains 60% water. If a plant cell is placed in 100% water, it will:

When a person is in a hospital, they never receive 100% pure water in an IV. This is because 100% water could cause their cells to:

A person who gets stranded in a lifeboat in the ocean should never drink salt water because it would cause their cells to:

The photo shows food being brought into the cell. What type of transport is this?

The movement of water across a semi-permeable membrane from an area of high-water concentration to an area of low water concentration is called:

The movement of substances across a semi-permeable membrane into and/or out of a cell without the use of energy is called:

In the picture of blood cells, water has been moving into the cells until they burst. Into what type of solution have these cells been placed?

In the picture of a plant cell, water has been leaving the cell causing the cell to shrink. What type of solution is the cell in?

The picture illustrates what types of transport?

What macromolecule is not in a cell membrane's make up?

A hydrophobic substance when placed in water will:

Which direction are the molecules moving over time in the image?

When water moves equally into and out of a cell it is in which type of solution?

Unlike animal cells, plant cells have cell walls that make them rigid. Which organelle, other than the cell wall, also plays a vital role in providing rigidity to plant cells?

The diagram on the right shows the concentration of water inside and outside of the cell, identify the tonicity of the solution outside the cell.