Homeostasis

Front

What makes a membrane selectively permeable?

Back

The ability to allow needed materials to enter and wastes to exit as well as the ability to block unneeded materials from entering the cell

Front

Phospholipids are molecules that--

Back

contain phosphate groups, form the bilayer of the cell membrane, have nonpolar tails and polar heads

Front

Which label shows transport proteins that could be used during facilitated diffusion? Options: A, B, C

Back

B

Front

Which of the following items would be able to diffuse directly through the cell membrane? Options: Water, Glucose, Potassium, Calcium

Back

Water

Front

A difference in the amount of substance in one area as compared to the same substance in another area is--

Back

concentration gradient

Front

Some molecules can pass through the cell membrane while others cannot. What can you conclude from the model?

Back

The cell membrane is semi-permeable.

Front

Which cell process will move substances against a concentration gradient?

Back

Active transport

Front

Which structure allows the passage of the oxygen molecule to the environment?

Back

cell membrane

Front

As a result of diffusion, the concentration of many types of substances--

Back

eventually becomes balanced, creating equilibrium

Front

Which process is best represented by the diagram? Options: Endocytosis, Phagocytosis, Exocytosis, Pinocytosis

Back

Exocytosis