• Study Guide Chapter 7 Section 4 Cellular Transport Answer Key
• Study Guide Section 4 Cellular Transport Keys

Osmosis Cells can gain or lose water by the process of. This depends on the water concentration of the solution inside the cell compared to water concentration of the solution outside the cell. The water concentration can be thought of as the proportion of a solution that is water. Solutions with a high concentration of solute molecules, such as sugars or salts, have a low concentration of water molecules and vice versa.

Section 1: Cell Discovery and Theory. CHAPTER 7 Cellular Structure and Function. Section 4: Cellular Transport. Study Cellular Transport Flashcards at ProProfs - Isotonic hypotonic and hypertonic solution.

Study Guide Chapter 7 Section 4 Cellular Transport Answer Key

Definition of osmosis The net movement of water from a region of high water concentration to a region of low water concentration through a selectively permeable membrane. This means osmosis is a special case of diffusion: the diffusion of water. In the diagram above solution two gains water faster than it loses sugar. This is because the selectively permeable membrane lets water molecules pass through much more rapidly than it lets sugar molecules pass through.

Original Document: What do you Know? Label the three images below as isotonic/ hypertonic/ hypotonic (with regard to the solution the cell is placed in) Hypertonic.Isotonic.hypotonic 2. Movement across the cell membrane that does not require energy is called active / passive transport. The difference in the concentration of a substance across a space is called a concentration equilibrium / gradient.

If there is a concentration gradient, substances will move from an area of high concentration to an area of equal / low concentration. The cell membrane is selectively permeable / impermeable. Equilibrium / Diffusion is the simplest type of passive transport.

The diffusion of water through a selectively permeable membrane is called osmosis / diffusion. The direction of water movement across the cell membrane depends on the concentration of free water molecules / solutions. A solution that causes a cell to swell is called a hypertonic / hypotonic solution.

Organelles that collect excess water inside the cell and force water out are called diffusion organelles / contractile vacuoles 11. The process of taking material into the cell by infolding the cell membrane is called endocytosis / exocytosis 12. In facilitated / molecular diffusion, membrane proteins help molecules across the membrane. In diffusion, molecules spread out / condense 14.

Study Guide Section 4 Cellular Transport Keys

The lipid bilayer describes a type of transport / the cell membrane 15. Facilitated diffusion moves substances down their concentration gradient with / without using the cell's energy. STUDY GUIDE 1. Know the parts of a solution (Solvent and solute) - the solute is the substance this is dissolved (sodium) and the solvent is the liquid it is dissolved in (often water) 2. Label a cell membrane (bilayer, proteins).