Question

select the true statements. in the video, potassium ions have a net movement into the cell. facilitated diffusion is diffusion assisted by a protein. facilitated diffusion requires cellular energy. potassium ions cross the cell membrane directly through the phospholipids.

Explanation:

• For "In the video, potassium ions have a net movement into the cell":
• From the image, there are more potassium ions outside the cell (in the pink area). So, the net movement is out of the cell, not into the cell.
• For "Facilitated diffusion is diffusion assisted by a protein":
• Facilitated diffusion is a type of passive transport where molecules (like ions) move across the cell membrane with the help of a protein (such as a channel protein or carrier protein).
• For "Facilitated diffusion requires cellular energy":
• Facilitated diffusion is a passive process. It does not require cellular energy (ATP). It relies on the concentration gradient.
• For "Potassium ions cross the cell membrane directly through the phospholipids":
• Potassium ions are charged. The phospholipid bilayer is non - polar. Charged ions cannot pass directly through the phospholipids; they need a protein (like a channel protein) for facilitated diffusion.

Answer:

Only the statement “Facilitated diffusion is diffusion assisted by a protein” is True.