KINS 1223 Lecture Notes - Lecture 5: Nucleolus, Mitosis, Messenger Rna
15 Sep 2016
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Basic structural and functional unit of the body. All shapes and sizes - over 200 different kinds a. i. Large enough to extend from spinal cord to feet a. ii. Controls which materials get in and out of the cell a. i. 1. a. i. 1. Communicates with other cells via specialized proteins on its surface a. i. 1. b. Cholesterol molecules - embedded in bilayer a. i. 1. a. i. 1. a. i. 1. a. i. 2. Make less permeable to water soluble molecules a. i. 1. a. ii. Two distinct types of proteins in membrane a. i. 1. a. i. 1. a. i. 1. a. i. 2. Globular (functional) transportation systems: contain channels or pores, or grouped to form channel, water soluble materials can pass, some channels always open, some gated - access is controlled by: Ligand: specific chemical-binds to receptor site on protein. Triggers gate to open: mechanical - physical stress. Nucleus, mitochondria, lysosome, perioxisome, endoplasmic reticulum, and golgi complex a. ii. Ribosome, centrosome, centriole, basal bodies b. b. b. a. i. Stored nutrients, pigments, crystals, etc: glycocalyx a. Id of bacteria and viruses by immune system cells.
