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28 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Steady state or ____ is maintained by mechanisms which and are involuntary, automatic, not consciously controlled.
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Homeostasis
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A variable or stressor is perceived by ____ within homeostatic control mechanisms.
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Receptor
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Vague word
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The ____ of the homeostatic mechanism is the response which will null the effects of the stressor
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effector
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Vague word
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Negative feedback diminishes or _________ the effect of the stressor
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neutralizes
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2 Examples of Negative feedback
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-Thermoregulation
-Blood glucose levels |
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2 examples of positive feedback
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-Blood clotting
-Labor and delivery |
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Autoregulation is also referred to as _____ _____.
Happens at what body level? |
Intrinsic regulation
Cell, tissue or organ |
ie cellular, atomic
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What systems are involved in extrinsic regulation?
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-Endocrine and Nervous system
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What are the 4 major elements of the hu body?
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-O C H N
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Lesser elements make up 3.9% hu body. What are they?
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Ca P K S Na
Cl Mg I Fe |
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Trace elements make up <.01% of the hu body. They are part of ___.
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-Enzymes
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1 neutron and 1 proton equal how many atomic mass units?
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2
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1 neutron=1 amu
1 proton=1 amu |
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1 neutron and 1 electron equal how many atomic mass units?
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1
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1 neutron=1 amu
1 electron=0 amu |
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A molecule is 2 or more ____ held together by chemical bonds.
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atoms
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inert elements have what?
reactive elements have what? |
-shells are full
-unfilled valence shell |
characteristic of these elements
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Ionic bonds form _____ and Covalent bonds form ______.
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-Crystals Molecules
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Having to do with charge:
Molecules are either ___ or ___. |
Polar or non-polar
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Having to do with charge:
Polar molecules are either ___ or _____. the number of electrons for each is how many? |
-Electronegative 6 or 7
-Electropositive 1 or 2 |
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H bonds are formed between ____ and _____.
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-hydrogen in a polar molecule
-electronegative atom in another molecule. |
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H bonds are important in stabilizing what?
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-large biological molecules
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3 types of chemical reactions.
---- ----- ----- |
-Combination
-Decomposition -Exchange |
general
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Oxidation reactions ____ electrons and reduction reactions ____ electrons.
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-Ox lose
-red gain |
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Reactants of an oxidation reaction are called ___ and reactants of a reduction reaction are called ____.
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-electron donors
-electron acceptors |
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What is chemical equilibrium?
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When neither the combination reaction reaction or the decomposition reaction is dominant.
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Not only does water have a high heat of vaporization but it also has high what?
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-High heat capacity
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Water dissolves what type of substances?
Water also forms what? |
-ionic
-hydration layers |
these substances form crystals
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The body's major transport medium is what?
This transport medium is also used how? |
-Water
-Cushioning in the body |
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Electrolytes are what kind of inorganic compound?
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-A salt
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