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. Cells undergo apoptosis in upper layers of the epidermis.
C. Protein granules accumulate in the cytoplasm of cells as they move up the layers.
D. Mitosis requires oxygen and nutrients supplied by blood vessels.
E. The cells in the deepest layer of the epidermis are metabolically active.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
The strong fibrous membrane covering the shaft of the long bone is called the:
a. diaphysis b. epiphysis c. periosteum d. endosteum
Lamellar bone
A. is not easily restructured. B. is organized into thin sheets of tissue. C. has its collagen fibers randomly oriented. D. is very light in weight. E. has a porous appearance.
As a lever produces more force, it also produces a greater speed and distance.
Answer the following statement true (T) or false (F)