micro chapter16 2015 - Nonspecific Defenses of the Host...

Info icon This preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
Nonspecific Defenses of the Host Chapter 16
Image of page 1

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

View Full Document Right Arrow Icon
Susceptibility : Lack of resistance to a disease (everyones is different) Immunity : Ability to ward/rid off disease (everyones different) Innate immunity : Defenses against any pathogen Non-specific (Any kind) Adaptive immunity : Immunity, resistance to a specific pathogen Specific (producing antibiodies..ect) The Concept of Immunity
Image of page 2
An Overview of the Body’s Defenses Levels of Resistance
Image of page 3

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

View Full Document Right Arrow Icon
“ The skin and mucus membranes are the bodies first line of defense against pathogens involving both mechanical and chemical factors” Mechanical Factors: Intact skin Dermis : irregular connective tissue Epidermis : outer layer epithelial tissue containing keratin. Skin and Mucus Membranes
Image of page 4
Physical Factors Skin Epidermis consists of tightly packed cells with Keratin , a protective protein
Image of page 5

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

View Full Document Right Arrow Icon
Epithelial layer and an underlying connective tissue layer Goblet cells: mucus Line the GI tract, respiratory system, genitourinary system. Mucus membranes generally provide less protection against microbes than skin. Mucous Membranes
Image of page 6
Ciliary Escalator The ciliary esclator prevents things from enertering lower resp.
Image of page 7

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

View Full Document Right Arrow Icon
Ciliary Escalator
Image of page 8
Other Physical Factors Lacrimal apparatus(eye) : Washes eye Saliva : Washes microbes off Urine :Flushing out ureter, keeping from colonization, Flows out Vaginal secretions : Flow out keep from colonization Ear wax: protects eardrum and entrance
Image of page 9

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

View Full Document Right Arrow Icon
Mechanical Factors: Lacrimal Apparatus
Image of page 10
Produced by the salivary glands of the mouth Dilutes the number of organisms Washes them from teeth and mucus membranes Lysozyme: antimicrobial properties against Gram positive bacteria. Mechanical Factors: Saliva
Image of page 11

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

View Full Document Right Arrow Icon
Chemical Factors Fungistatic fatty acid(keeps fungus from growing) in sebum Low pH (3–5) of skin(protects you) (usually grows around 6-7) Lysozyme in perspiration, tears, saliva, and urine, nasal secretions (gram +) Low pH (1.2–3.0) of gastric juice Low pH (3–5) of vaginal secretions Blood has transferrins:pick up iron and make it unavaible for others
Image of page 12
There are several relationships between normal microbiota and normal tissues that provide
Image of page 13

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

View Full Document Right Arrow Icon
Image of page 14
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