BIOL 1202 Chapter : 1202 Ch 36
Document Summary
36. 1: adaptations for acquiring resources were key steps in the evolution of vascular plants. 36. 2: different mechanisms transport substances over short or long distances. Selective permeability of membranes: plasma membranes controls movement of solutes into and out of the cell, passive transport: doesn"t" require energy, active transport: requires energy, transport protein: integral membrane proteins that carry out transport. Proton pumps: create a h+ gradient that is a form of potential energy, helps produce a voltage known as a membrane potential. Solute transport in plant cells: transport of many solutes driven by proton gradients, cotransport: transport proteins couple passage of one solute with passage of another, uptake of no3, uptake of sucrose. Q. a what powers a proton pump: atp hydrolysis, h+ gradient, membrane potential, sugar gradients. Osmosis: the diffusion of water across a selectively permeable membrane: affected by solute concentration and pressure.
