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Hondros Bio 254 Exam 1 – Questions And Answers
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Hondros Bio 254 Exam 1 – Questions And AnswersWhat are the functions of the lymphatic system? Correct Ans - 1. Drain
excess interstitial fluid
2. Help prevent edema
3. Absorb lipids from the digestive system
4. Defend body from disease
What are the organs of the lymphatic system Correct Ans - Spleen,
lymph nodes, lymphatic vessels
Where are lymph nodes found? Correct Ans - Everywhere in the body
except the CNS ( brain and spinal cord)
What does the lymphatic system do? Correct Ans - Protects the human
body against infection and returns interstitial fluid back to the circulatory
system
What are the 2 main lymphatic ducts Correct Ans - Thoracic duct and
right lymphatic duct
What portion of the body does the thoracic duct drain? Correct Ans -
75% of the body, Left upper body, left and right lower body
What portion of the body does the right lymphatic duct drain? Correct Ans
- 25%, right upper portion
Where do the 2 lymphatic ducts empty/drain? Correct Ans -
Subclavian vein, then back to the circulatory system
What is the largest lymphatic organ? Correct Ans - Spleen
What do lymphatic vessels contain, what do they do? Correct Ans -
Valves, help maintain lymph circulation and prevents backflow
What does skeletal muscle contractions and inspirations do? Correct Ans
- help maintain lymphatic circulation
Innate Immunity Correct Ans - Non-specific
, Physical barriers
Phagocytosis ( inflammation )
Adaptive Immunity Correct Ans - Involves B and T cells
Carried out by lymphocytes
What is Humoral Immunity Correct Ans - B cells and antibodies
What is cell mediated immunity? Correct Ans - T cells ( T
lymphocytes )
What are functions of interferons Correct Ans - Immune signaling for
molecules to target and prevent the spread of viruses
What is the most abundant Immunoglobulin Correct Ans - IgG- acts on
bacteria, viruses, and toxins, activates complement
What immunoglobulin can be found in tears, saliva, and breast milk?
Correct Ans - IgA - found in exocrine gland secretions, defends against
bacteria and viruses.
What Immunoglobulin is important in memory Correct Ans - IgM
What immunoglobulin is linked to allergic reactions and parasite infections
Correct Ans - IgE - found in exocrine secretions, causes inflammation
IgD Immunoglobulins activates Correct Ans - B cells and are most
active in infants
What triggers antibodies?
What is produced to fight antigens? Correct Ans - 1. Antigens
2. Antibodies
What is the function of memory T and B cells Correct Ans - To prevent
future infections
What is naturally acquired active immunity? Correct Ans - Exposure to
live pathogens
Stimulates an immune response to disease symptoms
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