Cell Transport Study Guide, L4
30 test answers
Unlock all answers in this set
Unlock answers 30question
Is the cell membrane selectively permeable or not?
answer
It is; it allows a small selection of molecules in and out.
Unlock the answer
question
What is diffusion?
answer
The movement of molecules from an area of high concentration to an area of low concentration without the use of energy
Unlock the answer
question
What does \"reach a state of equilibrium\" mean?
answer
The number of a particular type or types of molecules is even on both sides.
Unlock the answer
question
When a cell reaches a state of equilibrium, does the movement of molecules through the cell membrane stop?
answer
No, it continues.
Unlock the answer
question
What is osmosis?
answer
The movement of WATER from an area of high water concentration to an area of low water concentration without the use of energy.
Unlock the answer
question
What does \"passive\" mean when used in cell transport?
answer
The movement of molecules into and out of cells does NOT require energy.
Unlock the answer
question
What are two types of passive transport?
answer
Osmosis and diffusion
Unlock the answer
question
What is something you can do to show the movement of molecules through a membrane?
answer
Draw and label a container that contains a cell. Label the solute concentration in and out of the cell. Draw arrows to indicate movement of water.
Unlock the answer
question
True or false: Water surrounding or in the cell will always move towards the area of greater concentration of SOLUTE.
answer
True
Unlock the answer
question
What happens when a cell with a low concentration of a a solute, example salt, enters an environment with a higher concentration of the solute?
answer
Remember to draw the two concentrations. Water will leave the cell and move towards the area of higher concentration of solute. The cell will shrivel up.
Unlock the answer
question
What happens when a cell with a high concentration of a solute, example salt, enters an environment with a lower concentration of the solute?
answer
Water will move through the cell membrane towards the cell's high concentration of solute. The cell will swell.
Unlock the answer
question
What happens when the cell's concentration of a solute equals the concentration of a solute in the environment?
answer
Water doesn't need to move. The cell is in a state of equilibrium with its environment.
Unlock the answer
question
hypertonic
answer
more concentration ofsolute
Unlock the answer
question
hypotonic
answer
less concentration of solute
Unlock the answer
question
isotonic
answer
equal concentration of solute
Unlock the answer
question
What is active transport?
answer
The movement of molecules from an area of low concentration to an area of high concentration with the use of energy.
Unlock the answer
question
Does active transport require energy?
answer
Yes.
Unlock the answer
question
Does osmosis require energy?
answer
No
Unlock the answer
question
Does diffusion require energy?
answer
No
Unlock the answer
question
What are 3 types of active transport?
answer
Cell membrane pumps Endocytosis Exocytosis
Unlock the answer
question
What is endocytosis?
answer
Cell brings large molecules IN by pinching off part of the cell membrane allowing the molecules to enter. Molecules eNter.
Unlock the answer
question
What is exocytosis?
answer
Cell forces large molecules OUT of the cell by putting the waste or unwanted molecule in a vesicle that can go through the cell membrane. Molecules (in a vesicle) EXit.
Unlock the answer
question
What are the 3 parts to the cell theory?
answer
1. All cells come from other cells 2. The cell is the basic unit of structure and function 3. All living things are made of cells
Unlock the answer
question
What are the four things found in ALL cells?
answer
Cytoplasm, ribosomes, cell membrane and genetic material such as DNA
Unlock the answer
question
What are the two major types of cells?
answer
Eukaryotic and prokaryotic
Unlock the answer
question
What types of organisms belong to the two types of cells?
answer
Eukaryotic - bacteria Prokaryotic - plants, animals, protists and fungi
Unlock the answer
