bio- chap 43 - I NonSpecific Defenses Afainst Infection A...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
I. NonSpecific Defenses Afainst Infection A. 1 st Line of Defense -Skin and Mucous Membranes, and Secretions B. 2 nd Line of Defense: does not distinguish among pathogens 1. Phagocytic Cells (monocytes and neutrophils) a. antigens that penetrate first line of def. b. Phoagcytosis: ingestion of invading orgs. By certain types of WBCs c. Monocytes eventaully develop into macrophages d. Eosinophils- against larger parasitic invaders e. NK cells- non sepcific destory virus infected body cells. Cause a cell’s memb to burst instead of phagocytic action 2. Inflammatory Response a. increased flow of local blood supply causing fluid leaks into nearby tissues causing swelling b. initiated by chemical signals either from pathogen or body itself - histamine produced by basophils and mast cells from connective tissue - prostaglandins from leukocytes that promote blood flow to place of injury c. enhanced flow of phagocytes to injured area d. phagocytosis mediated by chemokines- checmo tactic factors e. neutrophils 1 st , then monocytes=> macrohages f.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern