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Related Flashcards
Cards In This Set
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Define Human Physiology
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The study of how our bodies keep us alive and functioning.
Physiology involves the specific processes that actually accomplish the required functions
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Define "Form follows Function"
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The interaction between anatomy (form) and physiology (function)- anatomy helps give a structure the potential to perform its function.
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Define Homeostasis
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Internally consistent average, monitoring us internally and if there is change it brings us back to a normal state.
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Why is homeostasis important?
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To conserve energy, for proper function, external factors respond to internal factors, (some of our body only works @ certain temps)
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How is homeostasis maintained?
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By negative feedback
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Explain negative feedback
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Stimulus occurs and a receptor receives message, that is sent to an integrating center, then sent to effector(helps the situation)= response occurs
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Result of homeostasis
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Maintenance of very stable internal conditions
maintain physiological "set points" like temperature
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Explain positive feedback
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Sets you as far away from "set points"; everything is amplified; maintains overall homeostasis
ex: contractions in childbirth, platelets=clotting
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Define Atom
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Smallest unit of matter that play a significant role in physiology
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Define pH scale
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Inverse measure of H+ ion concentration
-low #=high pH#=acidic (HCl)
-high#=low pH#= base (HCO3-)
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Define molecule
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Combination of atoms linked by chemical bonds
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Define polarity
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Sharing of electrons between molecules
-if not shared equally then there is + and - side to molecule
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Define Polar
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Molecules whose electrons are NOT shared equally among atoms
-water soluble(hydrophilic)
Ex: water, glucose, salt
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Define non-polar
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Molecules whose electrons are shared equally among atoms
-not water soluble (hydrophobic)
Ex:lipids, turpentine, chloroform
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Why does polarity matter?
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Solubility- what will break apart naturally
ability to cross a membrane
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