BIOL 1202 : Biology 1202 Exam 2 Notes Spring 2016
Document Summary
Influenza: does not perform reverse transcription and does not contain reverse transcriptase, chicken pox, only about 20,000 base pairs long. Less chance of mutation and therefore easier for immune system to destroy: chicken pox can hide in the central nervous system after it runs it course in the body. Later in life, the virus can branch out into the peripheral nervous system, causing shingles: viroid, simpler and smaller than a virus, contains an rna genome but has no plasma membrane or capsid. If microbes are swallowed, acids and protein-digesting enzymes destroy them: nonspecific internal defense, a. phagocytic cells, white blood cells (wbc"s) in extracellular fluid destroy microbes by phagocytosis, b. Mast cells bind to the debris: 3. Histamine dilates the capillaries for wbc: 5. If there is a future reinfection, b-cells rapidly multiply into plasma b- cells to attack the antigen: t-cell antibody response, step 1, an antigen is found.
