5 Written questions
5 Matching questions
- Three Types of Passive Transport
- Transport proteins
- Cell Membrane Function: A Biological Barrier
- Transport Across Cell Membranes: Equilibrium
- Two types of transport proteins
- a have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.
- b a) carrier proteins - facilitate the diffusion of glucose across the cell membrane
b) channel proteins - have tunnel-like pores filled with water that allow charged ions in and out of the cell
- c a cell membrane prevents many materials from entering the cell.
- d ...
- e a state at which molecules are evenly distributed (the concentration is equal throughout the medium)
- molecules continue moving but equilibrium is maintained
5 Multiple choice questions
- the reverse of endocytosis, whereby the membrane of vesicles or vacuoles fuses with the cell membrane and the stored contents are expelled from the cell.
- filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions
- the cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.
- Loss of water in a plant cell resulting in WILTING
- movement across cell membranes without an input of energy
2 reasons molecules move.
1. Brownian Motion
2. Concentration gradients
5 True/False questions
Two types of Endocytosis: → a) phagocytosis - when cells "eat" by taking in large particles or other cells
b) pinocytosis - when cells "drink" by taking in droplets of fluid
Particle Model of Matter → all matter is made of tiny particles
Hypertonic solution → has a lower concentration of solute compared to inside the cell
Brownian Motion → in a liquid or gas, particles are in constant, random motion
Membranes at Work 1.Water Purification: Reverse osmosis → filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions