Sophia: Cell Transport

This lesson introduces the process of passive transport, explaining that it is a form of transport that does not require energy, and moves molecules down their concentration gradient. It is 2 of 4 in the series titled "Passive Transport."

A video presentation describing how transport proteins in the cell membrane allow solutes to cross the cell membrane without the use of cellular energy. [5:41]

This lesson introduces the process of passive transport, explaining that it is a form of transport that does not require energy, and moves molecules down their concentration gradient. It is 3 of 4 in the series titled "Passive Transport."

This lesson introduces the process of passive transport, explaining that it is a form of transport that does not require energy, and moves molecules down their concentration gradient. It is 4 of 4 in the series titled "Passive Transport."

This lesson introduces the process of passive transport, explaining that it is a form of transport that does not require energy, and moves molecules down their concentration gradient. It is 1 of 4 in the series titled "Passive Transport."

This lesson will explain how substances move across a cell membrane through the process of diffusion as well as discuss why this process is important in our bodies. It is 5 of 8 in the series titled "Diffusion."

A narrated, video tutorial illustrating how diffusion works. It shows the concentration gradient that diffusion follows, explains the difference between diffusion and facilitated diffusion, and presents real life examples. [7:46]

This lesson will describe in detail the processes that occur in the ETC phase of cellular respiration.

This lesson introduces the process of active transport, explaining that it is a form of transport that requires energy, and moves molecules against their concentration gradient. It is 3 of 4 in the series titled "Active Transport."

This lesson introduces the process of active transport, explaining that it is a form of transport that requires energy, and moves molecules against their concentration gradient. It is 4 of 4 in the series titled "Active Transport."