Biology Chapter 5 Quiz
The ideal osmotic environment for a plant cell is a(n) ___ environment.
hypotonic
A plant cell placed in a(n) ___ solution will lose water and plasmolyze.
hypertonic
The plasma membrane is selectively permeable. Which of the following can pass freely through the membrane with no assistance?
oxygen and carbon dioxide
What controls the direction of a molecule, such as oxygen, involved in passive transport?
the direction of the oxygen concentration gradient
An animal cell placed in a(n) ____ solution will gain water, swell, and possibly burst.
hypotonic
Frequently, transplanted organs are rejected by the recipient's body. How is this reaction related to plasma membranes?
Each person has a unique set of carbohydrate chains attached to his or her plasma membranes.
Which of the following is a difference between active transport and facilitated diffusion?
Active transport involves transport proteins, and facilitated diffusion does not.
A plant cell surrounded by a(n) ___ solution will be flaccid (limp).
isotonic
Which statement best describes phagocytosis?
A cell engulfs a particle by wrapping pseudopodia around it and packaging it within a vacuole.
The concentration of solutes in a red blood cell is about 2%. Sucrose cannot pass through the membrane, but water and urea can. Osmosis would cause red blood cells to shrink the most when immersed in which of the following solutions?
a hypotonic sucrose solution
A nursing infant is able to obtain disease-fighting antibodies, which are large protein molecules, from its mother's milk. These molecules probably enter the cells lining the baby's digestive tract via _____.
endocytosis
The ideal osmotic environment for an animal cell is a(n) ____ environment.
isotonic
Stability of an animal cell plasma membrane is enhanced by __________.
cholesterol molecules
The eukaryotic cell has multiple membrane-enclosed compartments. This evolutionary innovation provides what advantage to the cell?
The different membrane-enclosed spaces allow different parts of the cell to perform specific functions.
When considering the formation of membranes, they __________.
form spontaneously in aqueous environments
There is a net diffusion of water out of an animal cell when it is placed in a(n) ___ solution.
hypertonic
Osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. What really drives osmosis?
the difference in water concentration across a selectively permeable membrane