BIOS 251 EXAM 2 NEWEST ACTUAL EXAM WITH COMPLETE
QUESTIONS AND CORRECT VERIFIED ANSWERS (DETAILED
ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO
PASS CONCEPTS!!!
Which of the following statements about how the skin prevents disease is
false?
a) salt in sweat retards microbial growth
b) the skin is the most common route for organisms to penetrate the body
c) oil glands on the skin make it waterproof
d) native microbes that live on your skin help protect you from infection -
ANSWER-b) the skin is the most common route for organisms to penetrate the
body
This antimicrobial protein is found at high levels in lacrimal secretions (tears)
a) lysozyme
b) defensins
c) sebum
d) C3b - ANSWER-a) lysozyme
Which component of the compliment system would stimulate neutrophils to
phagocytize an attached cell?
a) C5a
,b) C5b
c) C3a
d) C3b - ANSWER-d) C3b
Which of the following would prevent a microbe from activating the Alternative
pathway of the compliment system?
a) a bacteria that has an enzyme that degrades antibodies
b) a bacteria that has a thick cell wall
c) a bacteria that can prevent C3b from binding to it
d) a bacteria that contain no mannose - ANSWER-c) a bacteria that can prevent
C3b from binding to it
Which of the following is NOT a feature of the skin that allows it to serve as a
barrier to infection?
a) melanin in the skin is toxic to a bacteria
b) sweat creates a sling environment that prevents non-halotolerant bacteria
from growing
c) tight junctions in keratinocytes make the skin waterproof
d) resident flora produce bacteriocins - ANSWER-a) melanin in the skin is toxic
to a bacteria
The immune system cell most commonly associated with allergies is:
a) neutrophil
b) eosinophil
c) basophil
d) macrophage - ANSWER-c) basophil
Which of the following would be an example of a PAMP?
,a) GaGs on the surface of eukaryotic of a PAMP
b) C3b bound to bacteria
c) peptidoglycan
d) tissue factor - ANSWER-c) peptidoglycan
This cytokine is released by virally infected cells, anti-viral - ANSWER-interferon
Suppose that someone's blood stem cells in their marrow ware dividing and
developing into B cells. What cytokine might be responsible for this?
a) chemokines
b) tumor necrosis factor
c) colony stimulating factor
d) interferon - ANSWER-c) colony stimulating factor
Which of the following cells would likely have Toll-like receptors (TLRs)?
a) mast cells
b) dendritic cells
c) neutrophils
d) T-lymphocytes
e) hepatocytes - ANSWER-mast cells, dendritic cells
Which of the following would be most likely to be detected by a Rig-like
receptor (RLR)
a) bacterial DNA
b) helminth proteins
c) double stranded RNA
d) LPS - ANSWER-c) double stranded RNA
, What event during inflammation is responsible for swelling?
a) diapedesis
b) increasing vascular permeability
c) vasodilation
d) increased sensitivity of nociceptors - ANSWER-b) increasing vascular
permeability
Put the steps of Phagocytosis in order.
Chemotaxis
Exocytosis
Recognition and Attachment
Engulfment (endocytosis)
Destruction and Digestion
Phagosome maturation and phagolysosome formation - ANSWER-Chemotaxis
Recognition and Attachment
Engulfment (endocytosis)
Phagosome maturation and phagolysosome formation
Destruction and Digestion
Exocytosis
What are examples of Antigen Presenting Cells? - ANSWER-Mast cells, Dendritic
cells, Macrophages, B-cells
Which of the following is NOT a way that antibodies assist the immune system
in getting rid of pathogens?
a) labelling pathogens for phagocytosis (opsonization)
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 trustednurse. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $28.99. You're not tied to anything after your purchase.
