5 Written questions
5 Matching questions
- Three Types of Passive Transport 3.Facilitated Diffusion
- Receptor - mediated endocytosi
- Membranes at Work 2. Kidney Dialysis
- Cell Membrane Function: 6 materials a membrane prevents from entering the cell
- a receptors, like antennae, detect specific compounds or cells and bind with them, triggering endocytosis.
- b filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions
- c 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.
- d - salts - atoms - viruses
- sugar - ions - bacteria
- proteins (7? this is what was in the notes)
most organelles are surrounded by membranes with the same structure as a cell membrane
- e diffusion of molecules across the cell membrane by way of transport proteins.
5 Multiple choice questions
- when the lysosome bursts and releases it's digestive enzymes into the cell resulting in cell destruction
- Integral proteins extend through the entire bilayer and project from both surfaces
- the diffusion of water molecules across a membrane (water molecules move from where they are more highly concentrated to where they are less concentrated)
- has a lower concentration of solute compared to inside the cell
- have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.
5 True/False questions
Phospholipid bilayer → Loss of water in a plant cell resulting in WILTING
Cell Membrane Function: A Biological Barrier → Cell membranes are semi-permeable allowing some materials to cross, while excluding others. They can select a) by particle size
- small enough to enter membrane - O2 H2O
- too large to cross - sugar
b) particular materials to transport across (they bind to chemicals based on their size shape or charge)
Plasmolysis → Loss of water in a plant cell resulting in WILTING
Transport Across Cell Membranes: Selective Transport → the movement of only certain substances across the cell membrane
Types of Transport Across Membranes: Passive Transport → movement across cell membranes without an input of energy
2 reasons molecules move.
1. Brownian Motion
2. Concentration gradients