The genes found in a region called the major histocompatibility complex are called:
human leukocyte antigens (HLAs)
alpha and gamma interferons
immunoglobulins (IgG)
autoantibodies
None of the above are correct
human leukocyte antigens (HLAs)
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How do veins prevent the backflow of blood?
A) Gravity B) Pressure C) Valves D) Bulk flow
Which of the following is a remnant of a short, muscular blood vessel that existed in the fetus?
A) hepatic portal B) ligamentum arteriosum C) ductus arteriosus D) umbilical artery E) fossa ovalis
Answer the following questions true (T) or false (F)
1. All types of sweat glands release their products by exocytosis, a type of secretion known as merocrine secretion. 2. The rule of nines is used to distinguish the various types of skin cancers from one another. 3. The ABCDE rule divides the body into 11 areas, each representing 9% of the total body surface area to estimate the percent of the body affected by burns.
During an inflammatory reaction, macrophages release ________, chemicals that prompt bone marrow to produce more leukocytes.
A. colony-stimulating factors B. karyocyte growth factors C. leukokinins D. histamines E. bradykinins