Biology chapter 3 test
Which of the following is a requirement for diffusion to take place?
A concentration gradient
Which of the following statements is correct?
Active transport requires cellular energy, but passive transport does not.
Which two substances are most likely to cross a cells phospholipid bilateral by simple diffusion?
Carbon dioxide & oxygen
Which of the following is the cell organelle most responsible for maintaining cellular homeostasis?
Cell membrane
Which two of the following are examples of active transport?
Exocytosis & Endocytosis
Which two of the following processes require energy?
Exocytosis & endocytosis
Which of the following statements is true regarding active transport?
It uses some of its own energy
Which of the following accurately describes dynamic equilibrium?
Molecules move into a cell at the same rate as molecules move out of the cell.
What is the diffusion of water across a selectivity permeable membrane called?
Osmosis
Which two of the following are examples of passive transport?
Osmosis & diffusion
Based on your knowledge of osmosis, which statement best describes osmosis is correctly?
Osmosis move only water across the cell membrane without using cellular energy.
Which of the following is the primary component that makes up the cell membrane?
Phospholipids
Which of the following describes the difference between simple diffusion and facilitated diffusion though cellular membrane?
Simple diffusion moves particles through the phospholipid bilayer of a cell membrane, but facilitated diffusion moves particles through transport proteins.
Which of the following distinguishes active transport from passive transport?
The use of energy
Osmosis always involves the movement of what?
Water molecules
When does diffusion occur across a cell membrane?
When the concentration of particles is different on each side of the membrane
