Examlex
Steroid hormones depend on receptors inside the cell because these hormones are ________ soluble.
Microfilament
Cytoskeletal element composed of actin subunits; reinforces cell membranes; functions in movement and muscle contraction.
Muscle Contraction
The process by which muscle fibers produce force and tension through the sliding of actin and myosin filaments, powered by ATP.
Nuclear Envelope
The double membrane structure that surrounds the nucleus in eukaryotic cells, controlling the flow of substances in and out of the nucleus.
Lipid Bilayers
Thin polar membrane made of two layers of lipid molecules. These layers are fundamental in the structure of cell membranes, providing barriers and pathways for substances.
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