What is the function and macrostructure of the lymphatic system?
What will be an ideal response?
The lymphatic system collects extracellular fluid and returns it to the venous system via a series of lymph capillaries and larger lymph vessels. Lymph vessels have valves to prevent backward flow. Lymph nodes occur at intervals along the lymph vessels, and are populated with white blood cells, which monitor the fluid (the lymph), for foreign cells or debris. The lymphatic system also consists of lymph organs, two of which are the thymus and the spleen. The thymus is involved in the immune system, and the spleen has several functions: to filter blood, produce some white blood cells, and store platelets and other blood cells.
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A 36-year-old woman is on a cruise ship and later develops nausea, abdominal pain, vomiting, and diarrhea. She is most likely suffering from which virus?
a. Norovirus b. Rotavirus c. Coronavirus d. Torovirus
Resource partitioning is the result of
a. parasitism. b. mutualism. c. competition. d. predation. e. commensalism
Which of the following helminth parasites do humans acquire by eating undercooked saltwater fish?
A) Schistosoma B) Fasciola C) Echinococcus D) Anisakis E) Ascaris
Which of the following microbes are classified as BSL-2?
A) Bacillus subtilis B) Staphylococcus aureus C) Staphylococcus epidermidis D) E. coli K-12 E) Both Staphylococcus aureus and Staphylococcus epidermidis