The dermis of mammalian skin, including that of humans, contains a large amount of extracellular matrix proteins, including collagen and elastin. As a person ages, the amount of elastin in the dermis declines

Which of the following cell types is likely to be the cause of this change in the dermis of the skin?
A. keratinocytes
B. fibroblasts
C. melanocytes
D. epidermal cells


B

Biology & Microbiology

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Cartilage is heavier and not as pliable as bone.

a. true b. false

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A skin cell of a red fox has 34 chromosomes. You look at the cell under a microscope and see that it has 34 chromosomes and one nucleus. Several hours later, you look at the same cell again and see that it has double the amount of DNA and one nucleus. A

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Describe the mechanisms of action of antibodies

What will be an ideal response?

Biology & Microbiology