Cell Membrane
Diffusion
Osmosis
Passive Transport
Active Transport
Cell types, theory, organelles
100
What is the main thing that makes up the cell membrane?
Phospholipids
100
The diffusion of water across a membrane is called __________.
Osmosis
Equilibrium
Hypertonic
Diffusion
1. Osmosis
100
Isotonic in terms of solute is
an equal concentration
100
____________ is the passage of a substance through a cell membrane from an area of higher to lower concentration.
diffusion
100
Active transport can be considered the opposite of diffusion
True
False
1. True
100
New cells are produced from....
Existing cells
200
The Pumps and channels in the membrane are composed of _________.
proteins
200
Passive transport occurs to help the cell reach
equilibrium or homeostasis
200
What might prevent a plant cell from bursting when placed in a hypotonic solution?
cell wall
200
Which of the following is NOT Passive transport?
1. Endocytosis
2. Osmosis
3. Diffusion
4. Facilitated Diffusion
1. Endocytosis
200
Endocytosis is the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell.
True
False
2. False
200
Hypothesis developed to explain the evolution of cells
Endosymbiotic Theory
300
What category has only a cell membrane?
a. Plant cells
b. Animal Cells
b. Animal Cells
300
Passive transport occurs which direction?
Down Concentration gradient
High to Low
With the Concentration Gradient
300
Osmosis will move water toward which kind of solution?
Hypertonic
300
Glucose is a large molecule that is transported across the cell membrane through a protein channel, from high to low concentration, a type of transport called ________.
facilitated diffusion
300
What type of transport are exocytosis and endocytosis?
Diffusion
Active
Passive
Osmosis
2. Active
300
Plant cell
400
Proteins in the plasma membrane help with which kind(s) of transport
1. Diffusion
2. Osmosis
3. Facilitated Diffusion
4. Active transport
2, 3, 4
Facilitated Diffusion (Passive), Osmosis (Passive), and Active Transport
400
______________are examples of passive transport, or movements across a concentration gradient without the consumption of energy.
1. Diffusion
2. Osmosis
3. Facilitated Diffusion
1, 2, 3
400
What happens to a cell that has a rigid cell wall when placed in a hypotonic solution?
It will swell until the cell is turgid
Its plasma membrane will pull away from the cell wall
It will swell until the cell bursts (lyses)
It will lose water to the environment, shrivel, and probably die.
1. It will swell until the cell is turgid (firm)
400
Facilitated diffusion uses energy to move particles across the cell membrane
True
False
False
400
Pumps are composed of _______ that are involved in active transport.
Proteins
Enzymes
Lipids
Channel proteins
1. Proteins
400
To be "living" and organism must respond to....
stimuli/environment
500
The cell membrane lets some things in and restricts entry for other things. This is what makes the cell membrane ____________.
selectively or semipermeable.
500
Only small, non-polar molecules can perform simple diffusion through the cell membrane
True
False
True
500
When we put red blood cells in a hypertonic solution, they _______
Shrink
Swell
Remain the same
None of the above
1. Shrink
500
One role of the circulatory system is to deliver oxygen to each cell. If oxygen is moving from High to Low concentration, ________ is occurring.
- Active Transport
- Osmosis
- Diffusion
- Endocytosis
3. Diffusion
500
Active Transport occurs __________ the concentrations gradient.
Against or with
500
Organelle that synthesizes proteins
Ribosomes