The type of passive transport by which small molecules like oxygen and carbon dioxide are able to pass directly through the cell membrane.
Diffusion
200
Active transport uses energy to move molecules up the concentration gradient from _______ to ________ concentration.
Low concentration to high concentration
200
A cell is said to be in a ______________ solution when the concentration of solute is the same inside the cell and outside the cell. The diffusion of water across the membrane will be equal.
Isotonic
300
In 1839, Dr. Theodor Schwann and Matthias Schleiden came up with the Cell Theory. The second part of the Cell Theory states: All living organisms are composed of ...
one or more cells
300
Cell membranes are "selectively permeable". What does this mean?
Certain molecules are able to pass through, while others are not.
300
This passive transport mechanism uses channel or carrier proteins to aid the diffusion of polar or larger molecules across the cell membrane.
Facilitated diffusion
300
The type of active transport mechanism that releases the waste contents of a vesicle to the outside of the cell.
Exocytosis
300
When cells are placed in a ________________ solution, there is more solute outside the cell than inside of the cell. In this environment, the cell will lose water and its shape will ______________.
hypertonic ; shrink or shrivel
400
In 1839, Dr. Theodor Schwann and Matthias Schleiden came up with the Cell Theory. The third part of the Cell Theory states: Cells are the basic ...
building-blocks of life
400
These macromolecules are embedded in the cell membrane and serve a number of functions. Some function as channels or membrane pores; others as carrier molecules.
Proteins
400
This type of passive transport involves the movement of water across a semi-permeable membrane
Osmosis
400
Describe what takes place during the process of endocytosis.
The cell membrane surrounds particles outside the cell and brings them inside the cell.
400
When cells are placed in a ________________ solution, there is more solute inside the cell than outside the cell. In this environment, the cell will gain water and its shape will ______________.
hypotonic ; swell
500
On the following list, name all of the items that are composed of cells? Shark, Water, Rock, Tree, Fungus, Bacteria, Sun, Oxygen, Cork, Cactus
Shark, Tree, Fungus, Bacteria, Cork, and Cactus
500
This waxy substance found in the cell membrane is required to establish proper membrane permeability and fluidity. Name this substance which keeps the phospholipid tails from sticking togenther...
Cholesterol
500
In what direction on the concentration gradient do particles naturally diffuse?
Down the concentration gradient
500
Make an analogy to illustrate the movement of solute particles during the process of active transport.
acceptable answers will vary
500
When the concentration of water outside of a cell is the same as the concentration of water inside the cell, this is known as being in a state of ______________.