The clumping of cells that are cross-linked by their attachments to antibodies is known as:
A) precipitation. B) opsonization. C) neutralization. D) agglutination.
Answer: D
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Diffusion of a solute through a solution is decreased by an
A) Increased concentration gradient. B) Increased size of molecule. C) Increased diffusion coefficient. D) Increased diffusion area.
Extracellular matrix is ________.
A) composed of strands of actin protein B) the most abundant extracellular material C) a type of impermeable cell junction found in epithelia D) not present in connective tissue
Which of the following is not found in RNA?
A) Guanine B) Thymine C) Uracil D) Ribose
This figure shows respiratory control centers in the brainstem. What does number 1 indicate?
A. Dorsal respiratory group B. Apneustic center C. Ventral respiratory group D. Pontine respiratory center