Psychology 1000 Lecture 5: Bio-lecture-Immunology.docx

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Ronald R Holden

Document Summary

Leukocytes are the active cells of the immune system (cid:0) white blood cells. Innate immunity is effective at recognizing bacterial pamps: more difficult to recognize viral pamps. Loaction inside cell size of virus, protein coat: rna interference of viral rna, stimulated by viral rna molecules, viral rna also causes infected cells to produce interferon, weakened state which the cell may recover from. Interferons also activate natural killer cells: secrete granules of perforin. Creates porese in cell membrane: cell lysis and death. Secretes proteases: protein degrading enzymes leading to apoptosis, apoptosis, programmed cell death, will eliminate cell and potentially the virus as well. B and t cells recognize antigens with receptors: each cell is specific for an antigen, thousands of identical receptors in membrane. The population of cells can recognize any antigen: each antigen may be recognized by multiple cells, 10 trillion cells with 100 million different receptors.