Z line (Z band) The thin membrane that separates adjacent sarcomeres in the fibres of striated muscle. It is visible under an electron microscope as a thin dark line in the middle of a lighter band. The centre point of each thin (actin) filament is anchored to the Z line and exerts a pull on the membrane when the fibre contracts.
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Sarcomere , sarcomere Any of the functional units that make up the myofibrils of voluntary muscle. Each sarcomere is bounded by two membranes (Z lines), which pr… Line , line1 / līn/ • n. 1. a long, narrow mark or band: a row of closely spaced dots will look like a continuous line I can't draw a straight line. ∎ Math.… Slope , Skip to main content Slope slope / slōp/ • n. 1. a surface of which one end or side is at a higher level than another; a rising or falling surface: h… baseline , baseline •catchline • dragline • tramline •landline • strapline • chatline •carline •breadline, deadline, headline, redline •neckline • hemline • hel… Cotidal Line , Skip to main content cotidal line Contour , con·tour / ˈkänˌtoŏr/ • n. (usu. contours) an outline, esp. one representing or bounding the shape or form of something: she traced the contours of h…
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