Final answer:
Size, shape, and polarity are the factors that affect whether or not something will get through a semipermeable cell membrane.
Step-by-step explanation:
The factors that affect whether or not something will get through a semipermeable cell membrane include:
- Size: Smaller molecules can easily pass through the membrane, while larger molecules may be unable to cross.
- Shape: The shape of a molecule can determine if it can fit through the pores of the membrane.
- Polarity: Non-polar molecules can pass through the lipid bilayer of the membrane, while polar molecules may need assistance to cross.
These factors play a role in determining what substances can enter or exit a cell through passive transport.