Cfcs were chemicals commonly used in refrigeration and as propellants in aerosol cans. in 1974, a research study discovered that cfcs were leading to a dangerous hole in the ozone layer. by the late 1980s most cfcs were banned as a result of the research. which statement best describes a possible way that societal decisions were impacted by the 1974 research study? cfcs were commonly used in refrigeration. cfcs were replaced with other products. cfcs were causing a large hole in the ozone layer. cfcs were the focus of a research study.

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses

What's the waste product of electrons and pyruvate combining in fermentation?