BIOL 151 Study Guide - Midterm Guide: Microfilament, Osmosis, Electrochemical Gradient
Document Summary
Either can"t pass, pass slowly, or need help. Same goes for the protein parts of the membrane. Some proteins stay static, possibly due to some cytoskeleton feature. Transmembrane proteins: a type of integral protein that goes through membrane. Your blood type depends on different glycoproteins in blood cells. Transport proteins: - help transport molecules through the membrane. An example of both integral & transmembrane proteins. Can be either carrier proteins or channel proteins. Passive transport: - no energy (atp) required. Ex: diffusion: goes from high conc. Low conc: moving down conc. gradient . Ex: facilitated diffusion: still does not require energy, ex: channel protein, not affected by concentration of other molecules. ***osmosis- type of diffusion; water across a membrane. Non-penetrating solutes, so only water can move. Hypertonic: - higher concentration of ions in solution than in cell. The solution is hypertonic to the cell . Hypotonic: - lower concentration of ions in solution than in cell.
