According to the sliding filament mechanism of muscle contraction, the thick filaments slide in closer together to shorten the sarcomere
Indicate whether the statement is true or false
F
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Cells that secrete protein fibers in bone are called
A) osteolytic cells. B) osteoclasts. C) osteoblasts. D) osteocytes. E) osteogenic cells.
Nets should be coarse and stiff in order to catch a fish more easily
Indicate whether the statement is true or false
Which of the these pairs is incorrectly matched?
A. Hair matrix - the growth center of the hair B. Hair root - the part of the hair buried in the skin C. Hair shaft - the part of the hair beyond the skin D. Hair follicle - smooth muscle that contracts to move the hair
The gray matter of the cerebrum forms a surface layer called the ________ and deeper masses called ________ surrounded by white matter
A) cortex; nuclei B) cortex; medulla C) medulla; midbrain D) medulla; nerves E) nuclei; tracts