Which type of bone cell is a large cell that forms from fusion of several precursor cells?
A. Osteochondral progenitor cell
B. Osteoblast
C. Osteoclast
D. Osteocyte
Answer: C
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Which of the following statements is NOT true?
a. Rigor mortis occurs as a result of a rise in intracellular calcium concentrations. b. In skeletal muscle a single action potential lasts about 5-10 msec. c. In skeletal muscle the relaxation time lasts slightly longer than the contractile time. d. In skeletal muscle the contractile response ceases when the lateral sacs take up Ca2+. e. A spring can move much faster than a muscle can contract.
__________ are small, hair-like feathers with barbs along the shaft that help guide the bird in flight and reposition the feathers
Fill in the blank(s) with correct word
Sort the following types of membrane transport mechanisms into active or passive processes
In vertebrates
a. the ECF and ICF have the same composition. b. the plasma and the interstitial fluid have similar composition. c. the cellular proteins freely permeate into the ECF from ICF. d. the concentration of sodium ions and potassium ions in ECF and ICF is the same. e. all these.