Question

a student designs three models that each show one of the three transport processes that help a cell maintain homeostasis. which table correctly identifies the transport process shown in each model?

Explanation:

1. Model 1 (Oxygen Molecules): Oxygen moves from high (outside) to low (inside) concentration, no energy/protein needed → diffusion.
2. Model 2 (Water Molecules): Water moves across the membrane (high to low concentration) → osmosis (a type of diffusion for water).
3. Model 3 (Sodium Ions): Ions move against concentration (low inside to high outside) with ATP (energy) and a protein → active transport.

The second option (B) matches these processes.

Answer:

B. Model 1: diffusion; Model 2: osmosis; Model 3: active transport