AS BIOLOGY TOPIC 3 - CELL MEMBRANES AND TRANSPORT

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  • Created by: erinm135
  • Created on: 18-10-20 15:06
In phospholipids, what section is hydrophobic
The fatty acid tails
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In phospholipids, which section is hydrophilic
The phosphate group
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What is diffusion
Movement of particles from an area of lower higher concentration to an area of lower concentration
PASSIVE PROCESS
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What is facilitated diffusion
Involves 2 types of protein; channel proteins and carrier proteins. From an area of higher concentration to an area of lower concentration
PASSIVE PROCESS
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What is osmosis
The net movement of water molecules across a selectively permeable membrane from a region of low solute concentration to a region of high solute concentration
PASSIVE PROCESS
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What does hypertonic mean
Greater solute concentration
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What does hypotonic mean
Lower solute concentration
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What does isotonic mean
The same solute concentration
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What is active transport
The movement of ions and molecules against the concentration gradient. Energy is required so ACTIVE PROCESS
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What is bulk transport
This type of transport involves materials entering or leaving a cell without actually crossing a membrane
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What is endocytosis in bulk transport
The cell membrane folds around the material which then enters the cell inside a vesicle
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What is exocytosis in bulk transport
Refers to substances being moved out of the cell, where vesicles fuse with membrane
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Other cards in this set

Card 2

Front

The phosphate group

Back

In phospholipids, which section is hydrophilic

Card 3

Front

Movement of particles from an area of lower higher concentration to an area of lower concentration
PASSIVE PROCESS

Back

Preview of the back of card 3

Card 4

Front

Involves 2 types of protein; channel proteins and carrier proteins. From an area of higher concentration to an area of lower concentration
PASSIVE PROCESS

Back

Preview of the back of card 4

Card 5

Front

The net movement of water molecules across a selectively permeable membrane from a region of low solute concentration to a region of high solute concentration
PASSIVE PROCESS

Back

Preview of the back of card 5
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