Which of the following statements regarding tuberculosis is FALSE?
A) Nearly 1/3 of the world's population is infected with tuberculosis.
B) Nearly 1/3 of the world's population shows symptoms of tuberculosis.
C) It is responsible for nearly 2 million deaths per year.
D) At least 1/3 of those who are TB-positive are also HIV-positive.
E) Treatment requires at least six months of antibiotic therapy.
B
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Above zero degrees, the actual number of degrees Celsius for any given temperature is ____ the degrees Fahrenheit.
(a) higher than (b) lower than (c) the same as (d) a or b
Insulin can activate lipid synthesis in adipose cells and block breakdown of glycogen in the liver. How could one hormone have different effects on different organs?
_____ Adipose and liver cells may express distinct insulin receptors. _____ Adipose and liver cells may have unique signal transduction pathways activated by insulin. _____ Adipose cells do not express the insulin receptor while liver cells do. _____ Adipose and liver cells may contain different transcription factors that regulate the expression of different genes.
The amount of ultraviolet radiation hitting the Earth's surface is greatly reduced by which gas in the atmosphere?
a. ozone b. oxygen c. water d. carbon dioxide e. nitrogen vapor
Which of these causes damage to kidney cells in glomerulonephritis?
A) Antibodies against Streptococcus B) Circulating immune complexes C) Complement fixation D) Formation of immune complexes E) Production of IgG