KNES 259 Midterm: KNES 259 Study Guide - Midterm 1
31 Oct 2016
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The cell organelles main function of each: endoplasmic reticulum (smooth & rough, smooth: calcium storage, steroid production. Pituitary: ribosomes: make proteins, either free or attached (to endoplasmic reticulum) eg muscle, peroxisomes: makes hydrogen peroxide base to detoxify various waste products eg liver. Hepatocytes: lysosomes: sac of digestive enzymes (acid), used for repair and removal of foreign matter. Osmosis and diffusion / membrane transport - types (eg. facilitated vs simple, active vs passive: facilitated: channel or carrier help substance move across barrier, move along gradient, no. Phases of mitosis and meiosis: mitosis: prophase, prometaphase, metaphase, anaphase, telophase, meiosis: same as mitosis, except cycles through twice. Processes of cell metabolism (3 processes what goes in and what goes out; approx. yields) Cell junctions: gap junctions: allows movement of ions ex. heart, gut, tight junctions: no movement between cells ex. intestine, blood-brain barrier, desmosome: structural junction, withstands stress ex. skin, uterus.
