5 Written questions
5 Matching questions
- Types of Transport Across Membranes: Passive Transport
- Membranes at Work 2. Kidney Dialysis
- Cell Membrane Function: A Biological Barrier
- Hypotonic solution,
- Receptor - mediated endocytosi
- a a cell membrane prevents many materials from entering the cell.
- b has a lower concentration of solute compared to inside the cell
- c movement across cell membranes without an input of energy
2 reasons molecules move.
1. Brownian Motion
2. Concentration gradients
- d filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions
- e receptors, like antennae, detect specific compounds or cells and bind with them, triggering endocytosis.
5 Multiple choice questions
- has a higher concentration of solute compared to the inside of the cell
- 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
- a) phagocytosis - when cells "eat" by taking in large particles or other cells
b) pinocytosis - when cells "drink" by taking in droplets of fluid
- have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.
- the movement of only certain substances across the cell membrane
5 True/False questions
Three Types of Passive Transport: 1. Diffusion → the net movement of particles from an area of high concentration to an area of low concentration
- no energy is expended
- in a cell very small particles can cross the cell membrane by moving between the phospholipid molecules
Active Transport → the use of vesicles to facilitate movement of substances that are too large to enter or exit the cell via transport proteins
Isotonic solution → has a lower concentration of solute compared to inside the cell
The activities of a living cell depend on the ability of its membrane to → diffusion of molecules across the cell membrane by way of transport proteins.
Three Types of Passive Transport 2.Osmosis → the diffusion of water molecules across a membrane (water molecules move from where they are more highly concentrated to where they are less concentrated)