(I love Marine Biology. Just throwing that out there.)
The Facts:
-Photophores are organs that produce light usually found on deep-sea creatures. That's an awesome adaptation and I mean "awesome" in the sense that it literally fills me with awe.
-Selective permeability describes something that allows certain substances to pass through it, and not others
-Osmosis is the movement of water through a selectively permeable membrane
-The first law of Thermodynamics states that all energy in the universe is constant
-The second law of Thermodynamics states that energy isn't always recycled due to entropy, or "randomness" of energy becoming unusable
Key Terms:
-Diffusion: The tendency for particles to spread out evenly in an open space
-Concentration Gradient: the concentration of particles or a substance
-Tonicity: The ability of solution to cause a cell to gain or lose water
-Aquaporins: transport proteins that help with the rapid diffusion of water
-Endocytosis: the process of which a cell takes in substances
-Exocytosis: the process of which a cell expels substances
-Phagocytosis: the process of which a cell "eats"
-Pinocytosis: the process of which a cell takes in liquids
-Kinetic Energy: Energy of motion
-Potential Energy: Stored energy
Summary:
This chapter was all about the actual functions of cells as a whole, rather than the individual that we read about in the previous chapter. The kinetic energy of a person on a bike, or the potential energy of a ball we're about to punt across a field both qualify for scientific marvel. That is, the laws of thermodynamics.
Not only does it cover energy on a macro scale, it also looks at diffusion, active transport and passive transport. Cells are very busy little beings, always finding their place, and trying to equal out concentrations.
http://www.youtube.com/watch?v=sdiJtDRJQEc
This guy has a cool voice
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