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Care and cleaning of a microscope
1) carry the microscope by holding on to the arm and base; 2) use the course knob only with low power; 3) clean the lenses with lens paper and distilled water (use alcohol ONLY if oil was used); 4) always leave the lowest power lens when putting away
cell component that gives form and controls passage of materials into and out of cell
cell component that metabolizes nonpolar compounds and stores Ca² in striated muscle cells, granular (rough) endoplasmic reticulum assists in protein synthesis
cell component that synthesizes carbohydrates and packages molecules for secretion, secretes lipids and glycoproteins
cell component that release energy from from food molecules and transform energy into usable ATP
cell component that contain enzymes that detoxify harmful molecules and break down hydrogen peroxide
cell component that helps organize spindle fibers and distribute chromosomes during mitosis
microfilaments and microtubules
cell component that support cytoplasm and transport materials within the cytoplasm
cell component that supports nucleus and controls passage of materials between nucleus and cytoplasm
cell component that contains genetic code that determines which proteins will be manufactured by the cell
the type of cell division that occurs when organs grow or cells within organs need to be replaced
the stage of meiosis when the duplicated chromosomes separate and are pulled toward the centrioles
the stage of meiosis when chromosomes elongate into chromatin threads; nuclear membranes and nucleoli reappear
has abundant amounts of extracellular material or matrix; examples are tendons and ligaments
negative feedback mechanism
a control system where a stimulus initiates a response that reverses or reduces the stimulus, thereby stopping the response until the stimulus occurs again
positive feedback mechanism
homeostatic control mechanism that increases the stimulus to push the variable farther from its originial value
the electrical events conducted along the cell membrane that stimulate contraction; releases acetylcholine (ACh)
the neurotransmitter chemical that stimulates contraction of skeletal muscles
sustained muscular spasm; causes are depletion of muscle glycogen and reduced ability of the sarcoplasm
the movement of molecules from a region of higher concentration to a region of lower concentration
the diffusion of water from a region , diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal
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