In addition to protection (physical and chemical barrier), the skin serves other functions. Which of the following is another vital function of the skin?
A) It aids in the transport of materials throughout the body.
B) The cells of the epidermis store glucose as glycogen for energy.
C) It converts modified epidermal cholesterol to a vitamin D precursor important to calcium metabolism.
D) It absorbs vitamin C so that the skin will not be subject to diseases.
C
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Cells that remove excess bone tissue after fracture repair are
A. chondrocytes and osteocytes. B. osteoblasts and osteoclasts. C. fibroblasts and osteoblasts. D. osteoclasts and phagocytes.
Which of the following chambers of the heart is surrounded by the thickest layer of myocardium?
a) right atrium b) left atrium c) right ventricle d) left ventricle e) right auricle
Only ________ muscle cells are always multinucleated.
Fill in the blank(s) with the appropriate word(s).
The proximal convoluted tubule is the portion of the nephron that attaches to the collecting duct
Indicate whether the statement is true or false