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19 Cards in this Set
- Front
- Back
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Describe metabolism |
Total of an organism's chemical reactions |
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Describe Bioenergetics |
Study of how organisms manage their energy resources |
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Describe catabolic pathways |
Break down complex molecules into simpler compounds |
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Describe anabolic pathways |
Build complicated molecules from simpler ones |
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What is the relationship between catabolic pathways and anabolic pathways |
Usually energy released by catabolic pathways fuel anabolic pathways |
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What is energy |
The capacity to cause change |
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What are the 2 types of energy and what is their difference |
Kinetic energy is associated with moving energy. potential energy Is stored energy because of its location or structure |
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What is chemical energy |
Potential energy available for release in chemical reactions |
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What is thermodynamics |
Study of energy transformations |
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2 types of thermodynamics study |
Closed (isolated) system: Matter that is located from the surrounding. Open system: energy can be transferred between the system and the surrounding. |
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What is the 1st law of thermodynamics |
Energy is constant. Energy can be transferred and transformed but not created or destroyed. |
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What is the 2nd law of thermodynamics |
When energy is transferred from one form to the next usable energy decreases and the rest is released as heat in the surroundings |
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Entropy |
Measure of disorder or randomness or energy dispersal |
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The living systems free energy is..... |
Energy that can do work when temperature and pressure are uniform |
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Define Delta G |
The difference between the free energy of the final state and the free energy of the initial state |
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What is free energy |
Measure of a system's , its tendency the change to a more stable state. |
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Chemical reactions are classified as exergonic or endergonic. What is each of these? |
Exergonic: proceeds with a net release of free energy and is spontaneous Endergonic is spontaneous Endergonic reactions: Absorbs free energy from its surroundings and is non spontaneous |
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What is energy coupling |
The use of exergonic to fuel endergonic |
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A cell does 3 main kinds of work by energy coupling |
Mechanical: contracting muscles chromosomes moving Transport: pumping substances across membranes against the spontaneous movement Chemical: allowing endergonic reactions that wouldn't occur spontaneous to occur |
