Cellular Transport

What do labels l,ll, and lll illustrate?

C

What does facilitated diffusion across a cell membrane require?

C

Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?

CO2

For the following questions match the labeled component of the cell membrane in the figure with its description. Which component is the peripheral protein?

D

Which component is cholesterol?

E

Which of the following statements is correct about diffusion?

It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration

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

Proteins

Which of the following is a function of the cell membrane

Regulates which materials enter and leave the cell

What do diffusion and osmosis have in common?

They are passive transport mechanisms

According to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids?

They can move laterally along the plane of the membrane

Red blood cell what is most likely to occur

Water from the red blood cell will diffuse into the solution

A protein that spans the phospholipid bilayer is...

a transmembrane protein

Which means of particle transport requires input of energy from the cell?

active transport

Diffusion is the movement of molecules from...

an area of high concentration to an area of low concentration

I am doing an experiment with osmosis.. which beaker should i place it into

beaker of water

The presence of cholesterol in the plasma membranes of some animals...

enables the animal to remove hydrogen atoms from saturated phospholipids

Which cell is represented by the diagram below

endocytosis

Active transport 'is a way for molecules to move across the plasma membrane. When active transport is used to move molecules, what is required?

energy that the cell provides

Which statements are characteristics of diffusion through membranes?

ll and lll only

Diffusion occurs because...

molecules constantly move and collide with each other

When the concentration of molecules on both sides of a membrane is the same, the molecules will

move across the membrane in both directions

The diffusion of water across a selectively permeable membrane is called

osmosis

Select ALL of the statements that describe the particles or their movement based on the time lapse diagram

particles could be water do not have a charge doesnt require added energy

An organism with a cell wall would most likely be unable to take in materials through...

phagocytosis

Which of the following types of molecules are the MAJOR structural components of the cell membrane

phospholipids and proteins

What kinds of molecules pass through a cell membrane most easily?

small and hydrophobic

Which structural feature of the cell membrane allows molecules such as oxygen and carbon dioxide diffuse into and out of the cell?

the cell membrane is made up of two layers of phospholipids

Which statement provides a conclusion about the transport of water in and out of cells based on the results of the students experiment?

water moves freely both inside and outside of the cell independent of the solute concentration

An animal cell that us surrounded by fresh water will burst because the osmotic pressure causes

water to move into the cell