Question

during secondary active transport, when ions move parallel to the movement of a substance, this is termed ______.

antiport

symport

uniport

Explanation:

To solve this, we analyze the terms:

• Antiport: Ions and substance move in opposite directions.
• Symport: Ions and substance move in the same (parallel) direction.
• Uniport: Only one substance is transported, no ion - substance parallel movement here.

So, when ions move parallel to the movement of a substance in secondary active transport, it is symport.

Answer:

B. symport