Cell Membrane & Cellular Transport

Movement of particles through the cell membrane from high to low concentrations

• diffusion
• photosynthesis
• mitochondria
• active transport

Against the concentration gradient
low to high uses energy/ATP

• facilitated diffusion
• osmosis
• active transport
• diffusion

Allows certain molecules or ions to pass through it by diffusion and doesn't allow others.

• protein

• semi-permeable membrane

• isotonic

• homeostasis

Equal percentage of solutes inside and out.

Concentration of substances is the same.

• hypotonic

• isotonic

• nucleus

• hypertonic

What means of particle transport requires energy?

• passive

• active

• facilitated

• osmosis

What is the diffusion of water through a selectively permeable membrane?

• active transport

• osmotic pressure

• facilitated diffusion

• osmosis

Diffusion is the movement of particles

• from low to high concentration

• from high to low concentration

• from equilibrium to areas of high concentration

• all of the above

The current model of the plasma membrane is called the

• hydrophobic layer

• transport bilayer

• phosphoproteins

• fluid mosaic model

What characteristic of the cell membrane allows only certain material to pass through?

• selective gating

• selective permeability

• hydrophilia

• selective service

What is the function of cholesterol materials in the cell membrane?

• make the membrane thicker

• make the membrane more porous

• connect the proteins together

• make the membrane more stable