Question

exit ticket october 20 & 21, 2025
active transport requires cellular energy and moves substances from area of ___________ concentration to __________ concentration.
○ low, low
○ high, low
○ low, high
○ high, high

Explanation:

Active transport uses energy (like ATP) to move substances against the concentration gradient. Passive transport (e.g., diffusion) moves from high to low. Active transport is the opposite.

Answer:

C. low, high