Cell Membrane & Transport

What is the function of the cell membrane?

• To regulate what enters & exits a cell, contributing to maintaining homeostasis.

• To provide structural support for plant cells.

• To keep everything out of a cell.

• To let everything into a cell.

What structure serves as the cell's boundary from its environment?

• Chloroplasts

• The Cell Membrane

• Mitochondria

• Cytoplasm

The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?

• Lipids

• Carbohydrates

• Proteins

• Nucleic Acids

The movement of molecules from an area of high concentration to an area of low concentration is called

• Osmosis

• Active Transport

• Diffusion

• Endocytosis

When the concentration of molecules on both sides of the concentration gradient are the same you reach

• lift off

• equilibrium

• homeostasis

• absolute zero

Once equilibrium is reached do molecules continue to move into and out of the cell at equal rate with no net change?

• Yes

• No

Which type of transport requires energy?

• Endocytosis

• Exocytosis

• Active Transport

• Diffusion

What is osmosis?

• The movement of particles across a semi-permeable membrane.

• The movement of water across a semi-permeable membrane.

• The movement of molecules out of a cell using vesicles.

• The movement of molecules into a cell using vesicles.

Which type of solution is the cell in?

• hypotonic

• isotinic

• hypertonic

Which type of solution is the cell placed in?

• Hypotonic

• hypertonic

• isotonic