UT Arlington BIOL 1282 - Lecture 8 - Immune System (43 pages)

Previewing pages 1, 2, 3, 20, 21, 22, 41, 42, 43 of 43 page document View the full content.
View Full Document

Lecture 8 - Immune System



Previewing pages 1, 2, 3, 20, 21, 22, 41, 42, 43 of actual document.

View the full content.
View Full Document
View Full Document

Lecture 8 - Immune System

48 views


Pages:
43
School:
University of Texas at Arlington
Course:
Biol 1282 - Introduction to Biology Laboratory

Unformatted text preview:

Biology 003 Organisms in Their Environment Lecture 8 Immune System Photo by Sarah Wolak Figure 24 1A Innate immunity 24 1 3 The response is the same whether or not the pathogen has been previously encountered External barriers 24 1 Internal defenses 24 1 2 Skin exoskeleton Acidic environment Secretions Mucous membranes Hairs Cilia Phagocytic cells NK cells Defensive proteins Inflammatory response 24 2 Adaptive immunity 24 4 15 Found only in vertebrates previous exposure to the pathogen enhances the immune response Antibodies 24 8 10 Lymphocytes 24 11 13 The lymphatic system 24 3 INNATE IMMUNITY Innate immunity is a series of defenses that act immediately upon infection are the same whether or not the pathogen has been encountered before Invertebrates rely solely on innate immunity Innate immunity in vertebrates Vertebrate innate immunity includes Barriers skin tracheal cilia Interferons proteins produced by virus infected cells that help to limit the cell to cell spread of viruses Phagocytic cell eater cells white blood cells Neutrophils most abundant WBC in mammals Macrophages are large phagocytic cells Natural killer cells attack virus infected cells Complement system a group of about 30 kinds of proteins creates membrane attack complex in bacteria Interferon protein that serves as alarm signal Antiviral proteins block viral reproduction Viral nucleic acid Virus 1 New viruses 2 Interferon genes turn on DNA mRNA 5 3 Interferon molecules Host cell 1 Makes interferon is killed by the virus Figure 24 1B 4 Interferon stimulates cell to turn on genes for antiviral proteins Host cell 2 Is protected against the virus by interferon from cell 1 Phagocytic White Blood Cells Neutrophil attacking bacterium Macrophage ingesting bacteria Inflammation setting on fire Tissue damage triggers the inflammatory response Pin Skin surface Swelling Bacteria Signaling molecules White blood cell Blood clot Phagocytes and fluid move into the area Phagocytes Blood vessel 1 Tissue injury



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Lecture 8 - Immune System and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Lecture 8 - Immune System and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?