A&P Chapter 21
Immune System exam
questions and answers
two systems of immunity in humans - answer innate system (non-
specific)
adaptive system (specific)
structures of the immune system - answer immune cells, antibodies,
chemicals
first line of defense - answer innate
surface barriers:
skin, mucous membranes and their secretions
second line of defense - answer innate
internal defenses:
phagocytes, NK cells, inflammation, antimicrobial proteins, fever
,third line of defense - answer adaptive
humoral immunity: B cells
cellular immunity: T cells
anatomically, the immune system is a ----- system - answer functional
(as opposed to an organ system)
skin's action in first line of defense - answer keratin presents a physical
barrier
skin and vaginal secretions are acidic
sebum chemicals are toxic to bacteria
mucous membrane's action in the first line of defense - answer mucosa
traps microorganisms (digestive, respiratory, urinary and reproductive
tracts)
stomach lining secretes HCl and digestive enzymes
saliva and tears contain lysozyme
lysozyme - answer enzyme that destroys bacteria
local action in the second line of defnse - answer inflammation
, inflammation's action in the second line of defense - answer enlist WBC
and their chemicals, raises temperature
systematic action in the second line of defense - answer fever
destroy pathogens by phagocytosis - answer phagocytes
types of phagocytes - answer macrophages
neutrophils
eosinophils
macrophages - answer derived from monocycte
phagocytotic
neutrophil - answer become phagocytes when meeting infectious
microorganisms
eosinophils - answer important against parasitic worms
germs entering tissues are confronted by ---- - answer phagocytes
natural killer cells - answer can lyse and kill cancer cells and virus-
infected cells (via apoptosis)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BRAINBOOSTERS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.