LIFESCI 1 Lecture Notes - Lecture 17: Epithelium, Multicellular Organism, Cell Adhesion Molecule
Document Summary
Prokaryotes: most prokaryotes = single cell (some w/ simple filaments or live in colonies) some bacteria have several different cell types (ex. Cyanobacteria) no bacteria have macroscopic bodies w/ distinct types of tissues only for eukaryotes. 4 eukaryote groups achieved simple multicellularity by combining together during one stage of life cycle slime molds. Bulk transport means by which molecules move through organisms at rates beyond those possible by diffusion across a concentration gradient: animals active pumping of blood through circulatory system supplies oxygen to. Instructor: tonya kane tissues meter+ away from lungs: carries organic molecules required for respiration large distances from intestinal cells that absorb molecules from digestive tract molecules = transported actively into bloodstream also carries endocrine signaling molecules (ex. 3 requirements for multicellular life: adhere together, communicate w/ each other, participate in network of genetic interactions to regular cell division/differentiation.
