Cross bridge formation between myosin heads and actin molecules is caused by the elevation of calcium ion concentration in the cytosol. during rigor mortis, this elevation of calcium ion concentration in the cytosol is permanent because stop producing atp molecules required by the sarcoplasmic reticulum's calcium ion pumpstroponin molecules bind irreversibly to calcium ions to prevent them from being removed from the cytosoltropomyosin molecules bind irreversibly to calcium ions to prevent them from being removed from the cytosolacetylcholine continues to stimulate the release of calcium ions from the sarcoplasmic reticulum

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.

One of the reasons that stars are so large is because

Casts and mold are a type of preservation where the original material decays, leaving a mold in surrounding rock that can be filled with another sediment a. true b. false