A nontreponemal flocculation serologic test in which soluble antigen particles are coalesced to form larger particles that are visible as clumps when they are aggregated by antibody is called the __________ test
a. nontreponemal flocculation (NTF)
b. FTA-ABS
c. VDRL
d. TP-PA
C
The two most widely used nontreponemal serologic assays are the VDRL and RPR tests. Each of these tests is a flocculation (or agglutination) test, in which soluble antigen particles are coalesced to form larger particles that are visible as clumps when they are aggregated by antibody.
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In Wilms' tumor,
A) heart cells divide as frequently as do cells in the skin. B) being exposed to cigarette smoke in the uterus causes lung cancer in infants. C) cells in a child's kidney divide as frequently as if they were still in a fetus. D) deletion of the retinoblastoma gene causes an eye tumor.
The first cell of a new individual is the
a. blastula. b. gastrula. c. embryo. d. zygote. e. gamete
________ improved the original light microscope in the late 1600s, allowing the visualization of ________
A) Theodor Schwann; the internal structures of cells, such as ribosomes, nuclei, and golgi bodies B) Robert Hooke; bacteria and viruses C) Antonie van Leeuwenhoek; sperm cells, bacteria, algae, and other protists D) Robert Brown; cell structures using fluorescent antibodies E) Rudolf Virchow; collagen and muscle cells
The cardiovascular system consists of the heart, blood vessels, and skeletal muscles.
Answer the following statement true (T) or false (F)