What is the best explanation for the observation that mitosis occurs in the deepest layers of the epidermis?
A. Cells are dead in the top layer of the skin.
B. Protein granules accumulate in the cytoplasm of cells as they move up the layers.
C. Mitosis requires oxygen and nutrients supplied by blood vessels.
D. Cells undergo apoptosis in upper layers of the epidermis.
E. The cells in the deepest layer of the epidermis are metabolically active.
C. Mitosis requires oxygen and nutrients supplied by blood vessels.
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The dermis is a strong, flexible connective tissue layer. Which of the following cell types are likely to be found in the dermis?
A) monocytes, reticulocytes, and osteocytes B) fibroblasts, macrophages, and mast cells C) goblet cells, parietal cells, and chondrocytes D) osteoblasts, osteoclasts, and epithelial cells
What method do cells use to transfer small to moderate-sized water-soluble substances across the membrane?
a. vesicular transport b. carrier-mediated transport c. phagocytosis d. protein-assisted osmosis e. electrical diffusion
Brachial means lower leg.
Answer the following statement true (T) or false (F)
Which of the following best describes the process of cell death in chemical injury?
a. Alteration in cellular membrane b. Decreased cellular oxygen delivery c. Exotoxin toxicity d. Lack of essential vitamin complexes