chapter 12 The Innate Immune system (diana's version) Flashcards
innate immunity refers to
defenses present at birth
these are non-specific defenses: acting against most microbes in the same way
innate immunity
True or false.
Innate immunity has no memory component in which cannot re-call previous contact with a foreign particle
true
The innate immune system is always present
(describe the two characteristics)
1) it responds rapidly to an infection
2) it is active before an infection occurs
The innate immune system includes:
physical barriers
chemical barriers
cellular defenses
inflammation
fever
molecular defenses
what is the first line of defenses?
physical and chemical barriers
because innate immunity has no memory component and cannot re-call previous contact with a foreign microbe.. expand on that
effects it’s efficiency since it has no memory component
responds rapidly to foreign material…. if this is not well funded such as you’re stressed, you are not eating well, no nutrients, the likehood of infection is higher
innate immune system
describe the characteristics of skin
the outer surface of skin consists of dead cells and protective protein called keratin
the layers of the skin are frequently shed which removes microbes
skin is very dry which inhibits microbial growth
the outer surface of the skin consists of dead cells and protective protein called
keratin
skin infection are more common on _____ areas of the skin or ____ environments
moist, moist
what layer of the skin is an excellent defense and is rarely penetrated by microbes
outer layer
true or false.
most infections occur under the skin once the skin has been broken although fungi can sometimes grow on the skin’s surface: eating dead skin cells
true
Some microbes are able to eat dead skin cells and oils that are secreted by the skin , if this happens what is the result?
body odor
multi layer think , which makes it very hard to get in between, it has to be in tact to be a good barrier, having a cut will make the bacteria to go in
skin
what is giving you protection? **hint*8 they are thin and rich in protein
keratin
which part of the body is very moist?
armpit, this is why the bacteria loves it, and can cause B.O , if you do not use deoderant
this is open to the outside of the body, they are dirty
mucous membranes
name the characteristics of mucous membranes
these are membranes are involved in fluid exchange
they offer less protection than the skin
mucous membranes line ‘tracts’ such as digestive, reproductive, and respiratory tracts
they secrete mucous which is a glycoprotein that keeps the membrane from drying and cracking
- the mucous traps microbes
-cilia than moves the mucous containing microbes away
___ is a hair used for eukaryotic motility, it is a motility for the surface for the cell
cilia
fluid flow :
saliva, tears, urine, vaginal secretions move microbes away/out of the body
this does an excellent way by removing the contamination capsules and fimbriae = to attach
fluid flow
what are the three physical barriers
- mucous membrane
2.skin
3.fluid flow
what is the chemical barriers known
- acidity of body fluids and skin
2.lysozyme
3.the normal microflora