BIOL 103 Lecture Notes - Lecture 1: Cellulase, Gastric Glands, Intestinal Gland
21 Oct 2017
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Walker"s research freeze and freeze-thaw resistance in plants, invertebrates and microbes: freeze resistance in organisms from brine lakes in b. c: how do microbes form brine lakes survive? etc. Use of nanoparticles and their applications: impact of manufactured nanoparticles on microorganisms and animals: carbon nanotubes fetal abnormalities in pregnant mouse mums. No are all non-animal life autotrophic no. Protozoa: simple, single cell: produces invagination surrounds food with membrane food vacuole phagocytosis. Food vacuoles in paramecium (slipper-footed) intracellular digestion: food oral groove membrane surrounds it lysosomes fuse with vacuoles digestion. Extracellular digestion: hydra tentacles capture prey (prey is too big for intracellular digestion) rest of digestion takes place as intracellular digestion indigestible products are returned and goes out the mouth one opening only. Humans and alimentary canal openings at both ends. Not perfect: cannot digest cellulose/ plant material cellulose: difficult to hydrolyze, 1,4 linkages, only microorganisms, bacteria, protozoa can produce enzymes that can digest cellulose.
