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Chapter 25
Immune System
16
Microbiology
Undergraduate 4
05/01/2016

Additional Microbiology Flashcards

 


 

Cards

Term
Neutrophils are the most abundant phagocytic cells. How do they differ from other phagocytic cells?
Definition
They are common in pus and at the site of acute inflammation
Term
The most common circulating antibody isĀ 
Definition
IgG
Term
What causes antibodies to be released into the bloodstream?
Definition
When an antigen binds to the receptor of a B cell, it triggers the B cell to divide to produce plasma cells and memory B cells. The plasma cells release antibodies, which resemble the B cell receptor without the transmembrane portion and the portion that extends into the cytoplasm. This allows the antibodies to be released into the blood stream.
Term
How do T-cytotoxic cells function in our immune system?
Definition
Term
T cell receptors cause an adaptive immune response by
Definition
only binding when antigens are attached to self proteins
Term
Substances that cause an immune system response are calledĀ 
Definition
immunogens
Term
What is phagocytosis?
Definition
endocytosis of large particles
Term
Which of these immune system cells are phagocytes?
Definition
neutrophils
Term
What does the plasma membrane of a phagocyte attach to on a microorganism?
Definition
Glycoproteins
Term
The process by which a phagocyte moves toward a chemical signal at the site of an infection is called
Definition
chemotaxis.
Term
Which of the following phagocytic processes occurs last in the sequence?
Definition
Exocytosis
Term
What is the role of opsonins?
Definition
They create "handles" that make it easier for the pseudopods of phagocytes to attach to the microbe invader.
Term
What is a phagolysosome?
Definition
Term
Which of the following is similar to lymph?
Definition
blood plasma without red blood cells
Term
Which of the following is not a function of the lymphatic system?
Definition
Digestion of carbohydrates
Term
Which of the following is an example of a barrier defense that forms part of the innate immunity of vertebrates?
Definition
Acidity in the stomach kills many microbes.
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