Which of the following class of hypersensitivity reactions is not associated with autoimmunity?

A) cytotoxic
B) delayed hypersensitivity
C) allergies
D) immune complex
E) autoimmune


Answer: C

Biology & Microbiology

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The binding of a neurotransmitter to ligand-gated Cl? channels will cause ____ in the postsynaptic

membrane.

a. depolarization b. hyperpolarization c. repolarization d. apolarization e. depolarization and repolarization

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In streams and rivers, decomposition occurs primarily in

A) riffles. B) pools. C) runs. D) rapids

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According to the currently popular scientific theory for the origin of life, which of the following processes originated after the others? 

A. photosynthesis B. aerobic respiration C. anaerobic respiration D. protein synthesis

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Relaying a message from a membrane receptor to a molecule that performs a specific function within a cell occurs when

A) a signaling molecule binds to a protein that extends to the outside of the cell. B) a protein receptor on the interior of the membrane becomes bound by a signaling molecule. C) the extracellular matrix is moved to the inside of the cell. D) glycoproteins are recognized by other cells.

Biology & Microbiology