Choose the statement that best describes the direct ELISA technique.
A. Detects the presence of antibody in a sample using a known antigen absorbed onto the well
B. Detects the presence of antibody using a complement indicator system
C. Detects the presence of antigen in a sample using known antibody absorbed onto the well
D. Detects the presence of antibody using a radioactive isotope labeled antigen
Ans: C. Detects the presence of antigen in a sample using known antibody absorbed onto the well
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Angiotensin II triggers
A. vasoconstriction and increased urine output from the kidneys. B. vasoconstriction and decreased urine output from the kidneys. C. vasodilation and increased urine output from the kidneys. D. vasodilation and decreased urine output from the kidneys.
The mass number represents the number of
A) protons in an atom. B) electrons in an ion. C) neutrons in an atom. D) protons and neutrons in an atom. E) neutrons and electrons in an atom.
Which structure acts as a transducer in the spiral organ?
A. Tectorial membrane B. Stereocilium C. Round window D. Basilar membrane E. Inner hair cell
When a few intracellular mediator molecules activate several enzymes, and each of these activated enzymes activate still other enzymes, the hormone has initiated
A. a cascade effect. B. a double loop effect. C. a protein kinase effect. D. a cyclic effect. E. a negative feedback cycle.