APHY 102 Midterm Exam Questions with Verified Answers
|2026/2027 Update | A+ Graded
What is interferon? - Answer -proteins made by virus infected cells to stop spread of infection.
What is a compliment? - Answer -Group of proteins in plasma and other fluids that interact in
an expanding series of reactions of cascade
innate barriers - Answer -Nonspecific as they cause pain, swelling, fever, and phagocytosis; they
are general body reactions to pathogens
adaptive immunity - Answer -the ability to recognize and remember specific antigens and
mount an attack on them
What are the differences between T and B cells? - Answer -B cells make antibodies to fight of an
antigen. T cells attack antigens
How is interleukin-1 used? - Answer -It helps activate T cells.
How does an autoimmune disease work? - Answer -An autoimmune disease arises when the
body's cells lose their ability to distinguish between self and non-self antigens. When this
1|Page
,happens, the body mounts an immune response against what is really healthy tissue, and the
body attacks itself causing tissue, organ, and joint damage as well as pain, fever, and swelling.
passive immunity - Answer -the short-term immunity that results from the introduction of
antibodies from another person or animal.
active immunity - Answer -the immunity that results from the production of antibodies by the
immune system in response to the presence of an antigen.
What is the role of IgG? - Answer -Effective against bacteria, viruses, and toxins. Activates
complement proteins
What is the role of IgA? - Answer -Is in breast milk, tears, nasal fluid, gastric juice, intestinal
juice, and urine and it is an exocrine gland secretion
What is the role of IgM? - Answer -complement activation
What is the role of IgD? - Answer -antigen receptor found on B cells
What is the role of IgE? - Answer -contributes most to allergic and anaphylactic reactions; works
against environmental antigens
2|Page
, What is the function of the mouth? - Answer -mechanical breakdown of food; begins chemical
digestion of carbohydrates
What is the function of the pharynx? - Answer -passageway for air and food
What is the function of the esophagus? - Answer -to carry food, liquids, and saliva from the
mouth to the stomach
What is the function of the stomach? - Answer -digest food
What is the function of the small intestine? - Answer -digestion and absorption
What is the function of the large intestine? - Answer -absorption of water
What is the function of the rectum? - Answer -regulates elimination of feces
What is the function of the anus? - Answer -wastes exit the body
3|Page
|2026/2027 Update | A+ Graded
What is interferon? - Answer -proteins made by virus infected cells to stop spread of infection.
What is a compliment? - Answer -Group of proteins in plasma and other fluids that interact in
an expanding series of reactions of cascade
innate barriers - Answer -Nonspecific as they cause pain, swelling, fever, and phagocytosis; they
are general body reactions to pathogens
adaptive immunity - Answer -the ability to recognize and remember specific antigens and
mount an attack on them
What are the differences between T and B cells? - Answer -B cells make antibodies to fight of an
antigen. T cells attack antigens
How is interleukin-1 used? - Answer -It helps activate T cells.
How does an autoimmune disease work? - Answer -An autoimmune disease arises when the
body's cells lose their ability to distinguish between self and non-self antigens. When this
1|Page
,happens, the body mounts an immune response against what is really healthy tissue, and the
body attacks itself causing tissue, organ, and joint damage as well as pain, fever, and swelling.
passive immunity - Answer -the short-term immunity that results from the introduction of
antibodies from another person or animal.
active immunity - Answer -the immunity that results from the production of antibodies by the
immune system in response to the presence of an antigen.
What is the role of IgG? - Answer -Effective against bacteria, viruses, and toxins. Activates
complement proteins
What is the role of IgA? - Answer -Is in breast milk, tears, nasal fluid, gastric juice, intestinal
juice, and urine and it is an exocrine gland secretion
What is the role of IgM? - Answer -complement activation
What is the role of IgD? - Answer -antigen receptor found on B cells
What is the role of IgE? - Answer -contributes most to allergic and anaphylactic reactions; works
against environmental antigens
2|Page
, What is the function of the mouth? - Answer -mechanical breakdown of food; begins chemical
digestion of carbohydrates
What is the function of the pharynx? - Answer -passageway for air and food
What is the function of the esophagus? - Answer -to carry food, liquids, and saliva from the
mouth to the stomach
What is the function of the stomach? - Answer -digest food
What is the function of the small intestine? - Answer -digestion and absorption
What is the function of the large intestine? - Answer -absorption of water
What is the function of the rectum? - Answer -regulates elimination of feces
What is the function of the anus? - Answer -wastes exit the body
3|Page
