Cell Transport Test
What is the source of energy that cells use?
ATP
A cell with 10% solute concentration is placed in a solution with 30% water. What will happen to the cell?
Cell will shrink
If you place a saltwater fish into a tank made of distilled water, what will happen to the fish?
Cells will burst
Which of the following processes are represented in the following animation?
Exocytosis
If the solution surrounding a cell has a lower concentration of solutes than inside the cell, water will move into the cell through osmosis, causing it to expand. What kind of solution is surrounding the cell?
Hypotonic
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...
Osmosis
The movement of substances into and out of a cell without the use of energy is called
Passive Transport
What is used to pump molecules from a low concentration to a high concentration?
Protein channel
What is the element that is first moved during the sodium potassium pump?
Sodium
The plasma membrane of a cell is selectively permeable. Which is the best description of what this means?
The plasma membrane aids in maintaining homeostasis by allowing or restricting the materials allowed to enter a cell.
What do active transport and facilitated diffusion have in common?
They both use protein channels to move substances
How are phospholipids arranged in the plasma membrane?
a double layer, hydrophobic tails facing each other
An energy-requiring process that transports materials from one side of the plasma membrane to the other against the concentration gradient is referred to as
active transport
What type of transport involves molecules moving across the cell membrane against the concentration gradient?
active transport
What is the end result of diffusion across a cell's membrane?
equal concentrations of the solute on both the inside and outside of the cell
What is the function of the contractile vacuole in paramecium?
get rid of excess water
What structures within the plasma membrane allow the passage of ions or large molecules?
protein channels
The diagram below represents what occurred when an onion cell and a red blood cell were placed in distilled water. Which of the following best explains why the plant cells do not burst but animal cells often do?
the animal cells have only a cell membrane, whereas the plant cells have both a cell membrane and a cell wall which protects them from bursting
