BIOL 1334 Lecture Notes - Lecture 7: Plasma Membrane Monoamine Transporter, Microtubule, G2 Phase
12 Sep 2016
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Receptors for neurotransmitters like epinephrine, acetylcholine, dopamine. Cystic fibrosis- sweat of person is too salty; defect in chloride channel. If small, uncharged, hydrophobic (non-polar) >can cross easily. Charged particles (ions), large (glucose, protein), hydrophilic > require transport mechanism. Down the concentration gradient; high conc > low conc. Will continue to diffuse if gradient is there. Osmosis: solvent moves from high concentration to low concentration. Primary active transport: direct use of atp. Secondary active transport: indirect use of atp. Substance can flow from one cell to another. When the cell has no choice but to divide; goes into mitosis. Smooth er: detoxification of poisons, toxins, alcohol, steroid hormones. Lysosomes: self destruction- apoptosis; programmed cell death. Golgi apparatus: mod of proteins; packaging of proteins; exocytosis. Peroxisomes or microsomes: detoxify free radicals [o2-] that cause aging by oxidation. Anti-oxidants slow down aging process; vit e. Microfilaments: solid, composed of actin; support various structure ins. Microtubules: hollow; , alpha tubulin, beta tubulin.
