Bio Notes April 13

Bio Notes April 13 - Challenges in Water- Oxygen and other...

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Bio Notes April 13 ----- Driving force behind osmosis--- temperature ( random movement of molecules) Isotonic situation- same osmotic pressure inside and out. (Even) Espiration in Water ----- Oxygen does not dissolve much in water ---- loq oxygen content of water (0.4 to 0.8%) compared to our (21%) The water gets too mwarm and thus does not have enough oxygen concentration. - Not a problem for unicellular and simple mulitcellular organisms with low metablic requirements. (porifera, cnidaria) Why is cell size limited? ----- division of labor -------- surface area- volume ratio
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Unformatted text preview: Challenges in Water- Oxygen and other surface in the slides Large preying mantis (giants) not possible because there is no circulation in the meolymph. The Nervous sytem--- Division of Parts---- Structure of a neuron---- Neuron vs. Nerve Osmatic- to and from the skepeltal muscles, voluntary, and continous Autonomic Sysytem- sympathetic, and parasympathetic division Sympathetic dilution- fight response- dilates pupil, inhibits saliva production, accelerates heart, stimulates epinenphrine and stimulates glucose release Stretch receptor Efficient sensory neuron...
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Bio Notes April 13 - Challenges in Water- Oxygen and other...

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