Passive and Active Transport National 5 biology Passive and Active Transport
Recap Cell B is A. turgid B. plasmolysed C. Placed in pure water
Which solution is hypotonic? A B
What best describes the state of the red blood cell? Turgid Burst Plasmolysed No change
What best describes the state of the plant cell? Placed in concentrated salty water Placed in concentrated sugar solution Placed in pure water Placed in slightly salty water
What best describes a concentration gradient? A. a high concentration on one side of a membrane and a high concentration on the other side of the membrane B. a low concentration on one side of a membrane and a low concentration on the other side of the membrane C. a high concentration on one side of the membrane and a low concentration on the other side of the membrane
We are learning to: Explain the difference between active and passive transport Explain the term concentration gradient Name examples of passive transport
What’s the difference between active and passive transport? Passive occurs without energy Active requires energy
Passive Transport Which of the following do you think are passive forms of transport Diffusion Osmosis Active transport That was easy!!! Passive transport occurs with the concentration gradient from a high to a low concentration
Passive transport Passive transport does not require energy to occur Small molecules can pass across the cell membrane very easily E.g. water, oxygen, carbon dioxide, amino acids and glucose
Active Transport Active transport requires energy for membrane proteins to move molecules against the concentration gradient in order to maintain the gradient