Severe injuries and burns to the skin result in scars that are
A. fully functional regenerations.
B. produced by stratum basale keratinocytes, which effectively bind damaged skin parts together.
C. produced by chondrocytes and made mainly of desmosomes.
D. produced by fibroblasts and made mainly of collagen.
E. made by macrophages, which produce a dense granulation tissue.
Answer: D
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When the pH of body fluids begins to fall, proteins will
A) release a hydrogen from the amino group. B) bind a hydrogen at the amino group. C) release a hydrogen from the carboxyl group. D) bind a hydrogen at the carboxyl group. E) cause none of these actions.
Define the following terms:
What will be an ideal response?
The figure illustrates bones of the right upper limb. What does "D" represent?
A. Ulna B. Carpals C. Metacarpals D. Phalanges E. Radius
RNA is
A. single-stranded and contains uracil. B. double-stranded and contains uracil. C. single-stranded and contains thymine. D. double-stranded and contains thymine.