What is the purpose of valves in the circulatory system?
A) Control the volume of blood moved in each pulse
B) Prevent the backflow of blood in the vessels
C) Support the bifurcation of the veins
D) Allows for expansion and contraction of the veins
B
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Laminar airflow hoods were first developed during the:
A) 1950s. B) 1940s. C) 1960s. D) 1970s.
______ is the first immunoglobulin class produced in a primary immune response
a. IgD b. IgE c. IgG d. IgM
Keeping an individual carrying weapons near the medical provider to repel attackers is known as armed protection.
Answer the following statement true (T) or false (F)
The definition of extent of periodontal disease is
A) amount of periodontal disease involvement. B) rate of new cases occurring within a year. C) number of individuals in a population having the disease. D) number of diseased teeth or sites per individual. E) number of risk factors present in an individual.