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28 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
Steady state or ____ is maintained by mechanisms which and are involuntary, automatic, not consciously controlled.
A variable or stressor is perceived by ____ within homeostatic control mechanisms.
Vague word
The ____ of the homeostatic mechanism is the response which will null the effects of the stressor
Vague word
Negative feedback diminishes or _________ the effect of the stressor
2 Examples of Negative feedback

-Blood glucose levels
2 examples of positive feedback
-Blood clotting

-Labor and delivery
Autoregulation is also referred to as _____ _____.

Happens at what body level?
Intrinsic regulation

Cell, tissue or organ
ie cellular, atomic
What systems are involved in extrinsic regulation?
-Endocrine and Nervous system
What are the 4 major elements of the hu body?
-O C H N
Lesser elements make up 3.9% hu body. What are they?
Ca P K S Na
Cl Mg I Fe
Trace elements make up <.01% of the hu body. They are part of ___.
1 neutron and 1 proton equal how many atomic mass units?
1 neutron=1 amu
1 proton=1 amu
1 neutron and 1 electron equal how many atomic mass units?
1 neutron=1 amu
1 electron=0 amu
A molecule is 2 or more ____ held together by chemical bonds.
inert elements have what?

reactive elements have what?
-shells are full

-unfilled valence shell
characteristic of these elements
Ionic bonds form _____ and Covalent bonds form ______.
-Crystals Molecules
Having to do with charge:
Molecules are either ___ or ___.
Polar or non-polar
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
H bonds are formed between ____ and _____.
-hydrogen in a polar molecule

-electronegative atom in another molecule.
H bonds are important in stabilizing what?
-large biological molecules
3 types of chemical reactions.

---- ----- -----
Oxidation reactions ____ electrons and reduction reactions ____ electrons.
-Ox lose
-red gain
Reactants of an oxidation reaction are called ___ and reactants of a reduction reaction are called ____.
-electron donors

-electron acceptors
What is chemical equilibrium?
When neither the combination reaction reaction or the decomposition reaction is dominant.
Not only does water have a high heat of vaporization but it also has high what?
-High heat capacity
Water dissolves what type of substances?

Water also forms what?

-hydration layers
these substances form crystals
The body's major transport medium is what?

This transport medium is also used how?

-Cushioning in the body
Electrolytes are what kind of inorganic compound?
-A salt