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Physiology Test 1
Physiology
40
Physiology
Undergraduate 3
09/21/2008

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Cards

Term
What are the 5 types of energy?
Definition

1. Radiant

2. Mechanical

3.Electrical

4. Thermal

5. Chemical

Term
What is the Gibbs free Energy Equation?
Definition
ΔH = ΔG + TΔS
Term
For a reaction to be spontaneous, Δ(G) must be what?
Definition
1. Negative
Term
What is ΔG0?
Definition
The free energy at the beginning in a biological system
Term
A _________ reaction takes the free energy released by an exorgonic reaction to drive an endorgonic reaction.
Definition
Coupled
Term
Enzymes catalyze reactions by
Definition
Reducing the Energy of Activation
Term
Water is a great ______ beacuse it dissolves ionic compounds and polar organic compounds.
Definition
Solvent
Term
Adding particles to water leads to:
Definition

1.  An increase in Freezing point

2. An increase in boiling point

3. A decrease in Vapor Pressure

4.  An increase in Osmotic Pressure

Term
The movement of solutes in solution depends on what?
Definition
The concentration of solutes in solvent
Term
Isotonic Solutions are what?
Definition
Solutions with equal solute concentration
Term
Tonicity
Definition
is a measure of effective osmolarity or effective osmolality
Term
Osmolarity
Definition
is a measure of the osmoles of solute per liter of solution
Term
Hypotonicity
Definition
The opposite of a hypertonic environment is a hypotonic one, where the net movement of water is into the cell. If the cell contains more impermeable solute than its surroundings, water will enter it. In the case of animal cells, they will swell until they burst; plant cells do not burst, due to the reinforcement their cell wall provides. effective osmolarit or osmolality < 290 mOsm
Term

Hypertonicity

Definition
An animal cell in a hypertonic environment is surrounded by a higher concentration of impermeable solute than exists in the inside of the cell. Osmotic pressure directs a net movement of water out of the cell, causing it to shrink. effective osmolarity or osmolality > 290mOsm
Term
A _______ is generally a weak acid/base which resists change ein pH
Definition
Buffer Compound
Term
What are the four elements of protein structure?
Definition

1. Primary - Sequence

2.  Backbone Interactions

3.  Tertiary - Interactions between R-groups

4.  Interactions betweem protein chains.

Term
A phospholipid is composed of what?
Definition

1.  A Choline Head

2. A Phosphate Group

3. A glycerol with attached Fatty Acid Chains

Term
Cholesterol affect the membrane how?
Definition
They increase the interactions between the polar heads and push apart the non-polar tails
Term
Complex (1,2,3,4, or 5) oxidize the NADH in the mitochondria?
Definition
Complex 1 regenerates NAD+
Term
Complex 2 regenerates which proton carrier?
Definition
FADH2
Term
__ ATP Molecules are phosphorylated per NAD
Definition
3
Term
__ ATP Molecules are generated per FADH2
Definition
2
Term
How mnay ATP Molcules are generated by Glycolysis and the TCA Cycle
Definition
30-32
Term
Phosphidylcholine is present on which side of the Membrane?
Definition
Outer
Term
What are the three types of Ion Channels/Carriers?
Definition

1.  Voltage Gated

2.  Ligand Gated

3. Mechanogated

Term
What is the simplified Nernst Equation?
Definition
E = 0.058 Log ([Outside]/[Inside])
Term
What are the three fiber types of the cytoskeleton?
Definition

1. Microfilaments

2. Microtubules

3.  Intermediate Fibers

Term
The endocytation of fluids is called what?
Definition
Pinacytosis
Term
What is the endocytation of solids called?
Definition
Phagocytosis
Term
Which organelle is primarily responsible for protein modification?
Definition
Golgi Apparatus
Term
What are the 3 key steps in Indirect Signaling?
Definition

1.  Release of Chemical Messenger

2.  Transport

3.  Communication

Term
Hydrophilic Signals are transported how?
Definition
They are dissolved in the extra-cellular fluid
Term
Which type of signals are produced on demand?
Definition
Hydrophobic Messengers
Term
What are G-protein coupled reactors?
Definition
Membrane spanning proteins that interact with an intracellular protein called a G-protein
Term
What are the four types of secondary messengers utilized by G-protein coupled receptors?
Definition

Ca2+

Cyclic GMP

Phosphatidulinositol

Cyclic AMP

Term
In a Guanylate Cyclase Trans-membrane receptor, the conversion of ______ to ______ is catalyzed?
Definition
GTP, cGMP
Term
What does the cGMP bind to after leaving the receptor?
Definition
Phosphokinase-G (PKG)
Term
What does PKG do?
Definition
Phosphorylates Serine and Threonine in proteins
Term
Adenylate cyclase catalyzes the conversion of ATP to ____________?
Definition
cAMP
Term
What are the points of Amplification in the G-Protein coupled receptors?
Definition
1. A single Adenylate cyclase leads to multiple conversions on ATP to cAMP
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