A normally harmless antigen that causes an allergic reaction is called an allergen
Indicate whether the statement is true or false.
Answer: True
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Hematopoiesis begins at around day 7 after fertilization in mice. What is the site of precursor cells at this stage of fetal development?
A. Bone marrow B. Fetal liver C. Placenta D. Primitive organ E. Yolk sac
Antibodies made to Streptococcus pyogenes
a. can block enzyme function including red cell lysis, bacterial spread by blocking hyaluronidase, and degradation of DNA b. stay high for life after your first infection so they cannot be used diagnostically c. are measured in the rapid strep test, but if it produces a negative result for antibodies, should be followed by culture d. are the same as the antibodies made to Streptococcus aureus and so cannot be used diagnostically
Which organ is NOT found in the abdominopelvic cavity?
a. lung b. stomach c. gallbladder d. uterus
Worldwide, what is the percentage of people who smoke?
A) less than 20% B) 20%-40% C) 40%-60% D) more than 60%