All Flashcards

Label the components of the phospholipid bilayer.

1: Hydrophilic head, 2: Hydrophobic tail, 3: Phospholipid bilayer

Compare and contrast substances that can freely cross the cell membrane with those that require transport proteins.

Freely cross: Small, nonpolar molecules | Require transport proteins: Large, polar, charged molecules (ions)

Compare the cell wall composition of plants and fungi.

Plants: Cellulose | Fungi: Chitin

Describe the process of diffusion across a membrane.

Molecules move from an area of high concentration to an area of low concentration, without requiring energy input from the cell. Small, nonpolar molecules can diffuse freely across the phospholipid bilayer.