5 Written questions
5 Matching questions
- Receptor - mediated endocytosi
- Differentiate between a Vacuole & Vesicle.
- Transport Across Cell Membranes: Concentration Gradient
- Protein position within a membrane:
- Transport Across Cell Membranes: Selective Transport
- a Peripheral proteins are partially embedded in the inside or outside surface of the membrane
- b the difference in concentration between two areas for any given molecule produces a gradient or path of movement in which molecules move toward areas where the concentration of particles is lower
- molecules move down a concentration gradient
- c receptors, like antennae, detect specific compounds or cells and bind with them, triggering endocytosis.
- d the movement of only certain substances across the cell membrane
- e Vesicle transports contents
Vacuole stores the ingested material
5 Multiple choice questions
- the movement of molecules and ions against the concentration gradient which requires ATP energy and carrier proteins to pump these molecules from an area of low solute concentration to an area of high solute concentration.
- each phospholipid molecule has a head that is hydrophilic (water-loving) and two tails that are hydrophobic (water-fearing)
- the cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.
- uses pressure to force contaminated water through a membrane with fine pores that will not allow bacteria, salts, and other dissolved molecules through, resulting in water with fewer impurities
- Loss of water in a plant cell resulting in WILTING
5 True/False questions
Hypertonic solution → has a lower concentration of solute compared to inside the cell
Transport proteins → have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.
Transport Across Cell Membranes: Equilibrium → a state at which molecules are evenly distributed (the concentration is equal throughout the medium)
- molecules continue moving but equilibrium is maintained
Particle Model of Matter → all matter is made of tiny particles
The activities of a living cell depend on the ability of its membrane to → 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