A burn patient is treated with a skin graft, in which healthy skin containing ______ tissue is transplanted from one part of their body to the burned area.
A. connective
B. nervous
C. muscle
D. epithelial
D. epithelial
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Fish in a marine environment must maintain a relatively constant ion concentration in their tissues and blood. How do the chloride channels in the gills aid fish in the removal of excess ions?
A. The chloride channels create a countercurrent system where ions are lost from the gills and water is absorbed to dilute other ions (NaCl). B. The chloride channels create a countercurrent system where water is lost from the gills and chloride ions are absorbed. C. The chloride channels actively move ions into the gills and water will follow though osmosis. D. The chloride channels actively remove ions from the gills and water will follow through osmosis.
Monoclonal antibodies:a
have been linked as causative agents in some types of cancer. b. are only produced by harvesting B cells from mice exposed to particular antigens. c. include hCG, a component of commonly used home pregnancy tests. d. are very specific for their target antigen, but are somewhat difficult to purify. e. are produced by millions of genes.
Kinetic proofreading allows an enzyme to discriminate between two substrates by:
A. using a binding pocket of a specific size. B. using a multistep reaction and energy to reverse reactions. C. using a binding pocket of a specific shape. D. increasing the rate of the single chemical step of the reaction.
both the mouth and the nasal passages lead to a hollow space at the back of the throat called the
What will be an ideal response?