BIOL 101; Week 3 Quiz, Latest Study Guide, A+ Work - Liberty university. 2022

6 Energy-Driven Inventions - 6.1 Living Systems Require a Flow of Energy - In a phrase, how do physicists define “energy” ? Physicists define it as the ability to do work. How would a cell biologist define “energy” ? The ability to make specific changes occur. The physicist’s definition of energy is not ____________ for use in defining energy changes within a living cell. Comprehensive enough List 5 major sorts or categories of energy change within the cell. (a) synthetic work is demonstrated by the making of daughter cells from a parent cell, (b) movement is represented by the streaming movement of the cytoplasm, (c) concentration of a substance within a cell is effected by active transport, (d) electrical potential is generated by ion movement across a membrane, (e) heat energy is generated by increasing the rate of respiration in the cell. On a cold day, which of the following processes do your cells depend on to maintain an operating temperature of 37 degrees Celsius? a. shivering b. muscle contraction c. respiration energy production d. metabolic heat generation e. all of the above A. Shivering Sometimes the cell pumps substances against diffusion forces that would carry those substances the other way. What term would you give to this process? The energy of concentration of substances 6.2 Laws of Energy Flow in the Living World - ____________ is freely convertible from one form to another, but ____________ can never be created or destroyed. Energy; energy Systems that convert energy from one form to another are not 100% efficient, thus the amount of useful energy ____________. Decreases because some energy becomes useless, typically in the form of heat (the random motion of individual particles of matter). In nature, as energy freely changes from one form to another, the total amount of energy ____________ ____________. Becomes useless In living things, energy conversion is inefficient, with much energy being lost in the form of ____________. Heat energy What form of energy do producers use when they set about to generate chemical energy—the energy of C―H and C―O―H bonds? Solar energy A producer organism is called a “producer” because it produces usable ____________ ____________. Producers capture some of it by converting it to chemical energy. (from solar energy) When your car engine burns the octane in gasoline, in what form does at least 50% of the energy of the octane end up? More than half the energy resulting from the combustion of the octane is lost to the engine block as heat energy. A lit match cannot continue to burn when the wood of the matchstick is Energy is freely convertible from one form to Page 1 of 7 This study source was downloaded by from CourseH on :08:50 GMT -05:00