5 Written questions
5 Matching questions
- Two types of transport proteins
- Particle Model of Matter
- Protein position within a membrane:
- Phospholipid bilayer
- Membranes at Work 3. Controlled Delivery of Medications
- a Peripheral proteins are partially embedded in the inside or outside surface of the membrane
- 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 medication can be placed in a flat transdermal patch that sticks to the skin. A semi-permeable membrane lining the inner surface allows drugs to diffuse out of the patch at a slow, constant rate.
- d all matter is made of tiny particles
- e each phospholipid molecule has a head that is hydrophilic (water-loving) and two tails that are hydrophobic (water-fearing)
5 Multiple choice questions
- Vesicle transports contents
Vacuole stores the ingested material
- 1. transport raw materials into the cell (and out of)
2. transport manufactured products and wastes out of the cell
3. prevent unwanted matter from entering the cell
4. prevent the escape of matter needed to perform cellular functions
- movement across cell membranes without an input of energy
2 reasons molecules move.
1. Brownian Motion
2. Concentration gradients
- has the same solute concentration on both sides of the cell membrane. Equilibrium has been reached. EQUAL FLOW of water into and out of the cell
- filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions
5 True/False questions
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)
Protein position within a membrane:
Integral proteins → Integral proteins extend through the entire bilayer and project from both surfaces
Three Types of Passive Transport → the diffusion of water molecules across a membrane (water molecules move from where they are more highly concentrated to where they are less concentrated)
EXOCYTOSIS → the cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.
Transport proteins → have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.