BIOL 1201 Lecture Notes - Lecture 21: Cellular Respiration, Membrane Potential, Blood Sugar
Document Summary
Biology final exam review: cell signaling, g protein: G- protein binds and then phosphorylation happens. Called g-protein because it"s activated by binding with gdp. Ion gated channels result in change in ion concentrations. G-protein and tyrosine-kinase can: generate changes in gene regulation (turn genes on or off, these responses are off relatively slow and take time, activate an enzyme based pathway which is relatively fast (miliseconds, regulation. Antagonistic pairs: control of muscle and limbs, ex: blood sugar levels amount of glucose in bloodstream is regulated by two hormones simultaneously (glucose glycogen/ glycogen glucose) Only neurons and muscle cells can change their membrane potential. Neurons and muscle cells are excitable; they can generate action potential: these are the only cells with voltage-gated ion channels, these are channels that are important in generating action potential (can"t do it without them) Inside is negative compared to the outside . 3 na+ for every 2 k: synapses, gap junction: holds it together.