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