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Membrane & transport

Nat5 Unit 1 Section 2 DHS

QuestionAnswer
In the cell membrane; these molecules are formed into a double layer. Phospholipids
In the cell membrane; these molecules are involved in the transport of substances across the membrane. Proteins
This term describes the ability of the cell membrane to control what passes across it. Selectively permeable
This type of transport describes the movement of substances from an area of high concentration to an area of lower concentration. Diffusion
This term is used to describe the difference in the concentration of a substance on the inside of a cell and the concentration of the same substance on the outside of the cell. Concentration Gradient
Passive transport does not require this to occur. Energy
Diffusion will stop when the concentration of a substance on either side of a cell membrane is..... Equal
The term used to describe the property of molecules, such as glucose, carbon dioxide,oxygen and amino acids, that are able to move across the cell membrane. Small/Soluble
This term is used to describe the movement of water molecules across a membrane by diffusion. Osmosis
Osmosis is defined as the movement of water from an area of ..(1).. concentration to an area of ...(2)... concentration across a selectively permeable membrane. (1) High (2) Lower
When an animal is placed in a solution which has a higher concentration to the inside of the cell, the cell will ...... Burst
When an animal is placed in a solution which has a lower concentration to the inside of the cell, the cell will ...... Shrink
When a plant cell is placed in a solution which has a higher concentration to the inside of the vacuole, the vacuole will ...... Swell
When a plant cell is placed in a solution which has a lower concentration to the inside of the vacuole, the vacuole will ...... shrink
The term used to describe a plant cell which has been placed in a solution which has a lower water concentration to the inside of the vacuole, causing the vacuole to shrink, pulling the cell contents away from the cell wall. Plasmolysed
The word used to describe a plant cell, with a shrunken vacuole, that has become soft and unsupportive. Flaccid
The word used to describe a plant cell, with a swollen vacuole, that has become a hard and supportive plant. Turgid
This term is used to describe the movement of a substance from an area of low concentration to an area of higher concentration. Active transport
This resource is required for active transport to occur. Energy/ATP
These structures, found in the cell wall, are used to transport substances by active transport. Protein pumps
Protects the plant cell from taking in too much water by osmosis. Cell wall
Created by: dhsbiology
 

 



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