Unit 2 part 2 [s20]

What is diffusion?

• Movement of molecules from an area of LOW concentration to an area of HIGH concentration

• Movement of molecules from an area of HIGH concentration to an area of LOW concentration

• Movement of water across a semi-permeable membrane

• Transport that requires energy

What is osmosis?

• Active transport where the cell membrane engulfs particles

• A type of transport that requires energy

• Hypertonicity, Hypotonicity, and Isotonicity

• Diffusion of water across a semi-permeable membrane

What is this component of the cell membrane called?

• Phospholipid

• Phosphate head

• Lipid tail

• Membrane protein

What is the function of this phospholipid?

• To be a channel for passive transport of large molecules

• To make a semi-permeable membrane to regulate what enters and exits the cell

• To be a pump for active transport of large molecules

• To be like a nametag or uniform and identify the cell's identity

What is this structure?

• Lipid head

• Phosphate tail

• Phosphate head

• Lipid tail

What are these structures?

• Lipid head

• Phosphate tails

• Phosphate head

• Lipid tails

What is this structure?

• Carbohydrate tag

• Phospholipid bilayer

• Membrane protein

• Cholesterol

What is the function of this structure?

• To prevent all molecules from entering the cell

• To allow large, hydrophilic molecules to enter the cell

• To allow small, hydrophobic molecules to enter the cell

• To prevent large, hydrophilic molecules from entering the cell

What is homeostasis?

• How cells maintain a stable, healthy internal environment

• How cells maintain an unstable, unhealthy internal environment

What are the three types of passive transport?

• carbohydrates, lipids, proteins

• phospholipids, cell membrane, proteins

• protein pumps, endocytosis, exocytosis

• simple diffusion, osmosis, facilitated diffusion