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as the muscles of the eyes contract what happens to the power of the eye's lens?
increases
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when eye is focused on distant object, the image will appear
at the focal point since (1/o=0)
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when the eye is focused where does the image fall?
on the retina
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when power increases what happens to the focal length?
decreases
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what is hyperopia and how do we correct it?
- farsightedness, occurs when lens is too weak (can't contract and focus image on retina) or when retina is too close to the lens
- cannot see nearby objects (corrective converging lens needed to increase in power)
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how does wearing glasses correct the lens?
power of the resulting lens from the combination of eye and lens
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causal explanation
- assertion of a cause and effect relationship
- because the left lobe controls speech and understanding, left hand people who switch hands develop stutter
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ethical justification
- what should be true
- people should not be unjustly discriminated because it violates their human rights
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assertion about evidence
- something you take for basis of knowledge
- we know he was at the scene of the crime, because his fingerprints were there
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how are peptide bonds formed
when lone pair electrons on amino terminus attack the carbonyl carbon of incoming amino acid
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what are L and D amino acids?
- stereoisomers, optically active, all amino acids have except glycine
- all living cells use L-amino acids
- enantiomers so all properties are the same except optical activity
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what is the effective nuclear charge
- net positive charge experienced by valence electrons
- Zeff =Z-S
- Z is the atomic number
- S is the number of shielding electrons
- large Zeff, high electronegativity
- electrons in s orbital feel a greater effective nuclear charge than electrons in p orbital
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ionization energy
- energy to remove an electron
- easier in oxygen because of paired electron in p orbital, which creates electron electron repulsion, weakens the bond
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nitrile
C triple bonded to N
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grignard reaction
alkyl, aryl MgBr (good nucleophile) which attacks carbonyl groups of ketones or aldehydes and forms C-C groups
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what happens to the convergence of light in people with myopia, nearsightedness?
light converges at too short of a distance, causing things far away to converge in front of retina
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what happens to the ciliary muscle when focusing on a distance object?
- it relaxes
- the focal length of cornea (first converging lens) is constant, the second crystalline lens is controlled by relaxing and tensing of ciliary muscle. two lens acts as one
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when the ciliary muscle is tensed what happens to the shape of the lens and focal length
- is spherical, causes decrease in focal length
- when relaxed, increase in focal length. cannot relax sufficiently in people with myopia
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how can myopia be corrected? with what kind of lens and how?
- with a diverging lens (concave), the light is diverged before it reaches cornea where it can be converged on the retina
- convex lens (converging) used to fix hyperopia
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what is true of an image formed on the retina
- reduced, b/c retina is small
- object is at greater than focal length (less would be not real image)
- object
- inverted (all real image formed by converging lens is inverted)
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anomers
differ in their conformation at the anomeric carbon (difference between alpha and beta group)
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hemiacetal
aldehyde with one OH group, one OR, one R and one H
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difference between anomer and enantiomers
anomers differ at one chiral carbon, enantiomers differ at all chiral carbons
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what is a pyranose
5 C and 1 O (forms 6 membered ring)
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furanose
- 5 membered ring with 4C and 1O
- glucose can take either furanose or pyranose form
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disulfide bonds
- covalent bonds between two thiol (R-SH) groups
- disulfide occur between two cysteine amino acids which forms cystine
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acyl halide
carboxylic acid with halide instead of OH
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what would form with acyl halide and primary alcohol
ester
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what kind of bonds hold monosaccharides together?
glycosidic bonds covalent
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monosaccharides
simplest form of carbohydrate (one glucose molecule)
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14C how many neutrons and how many protons?
14 protons=number of protons and neutrons, since it is C then it has 6 protons, 8 neutrons
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equilibrium constant greater than 1
means that mixture contains mostly products, reaction occurs spontaneously
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oxidation number of nitrogen
-3
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oxidation number of oxygen in peroxide
-1
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artery
from heart to all other parts of the body (carries oxygenated blood)
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intramolecular hydrogen bond characteristics
when the molecule can hydrogen bond internally b/c of proximity of functional groups, decrease in melting point and decrease in solubility (cannot form H bond with water as effectively)
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gabriel synthesis
- transforms primary alkyl halides to primary amines
- requires base, OH- attacks H on imide, followed by nucleophilic attack on halide, complete with hydrolysis
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strecker synthesis
form amino acids from aldehyde or ketone via nitrile, need KCN, NH4Cl, and H
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good indicator changes when
- at the equivalence point where moles of acid added is equal to moles of base
- indicator changes color when pH =pKa
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b12 is bound to protein by what kind of bonds
hydrogen, since passage states that stomach acid denatures it
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what is the function of dideoxynucleotides
- chain terminators
- doesn't have OH at 3', has H
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characteristics of peptide bonds
low reactivity and planar geometry b/c of resonance,
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transpeptidases
involved in bacterial wall biosynthesis, cross links peptide side chains
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alcohol dehydrogenase
- break down ethanol, product of fermentation in yeast
- during a dive, reduced metabolism, reduced access to oxygen convert to anaerobic metabolism
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function of voltmeter
measuring electrical potential difference btw two points (as in between 2 resistors)
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what does the buoyant force equal?
- weight of the displaced fluid
- (p fluid)(Vobj sub) g
- denser object sinks until Fg=Fb
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a non sinking boat displaces what which is constant?
- mass displaced is constant
- volume submerged changes depending on the density of the fluid
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what happens to the buoyant force when you dive deeper
- gets higher, because density of fluid increases due to increase in pressure pgz
- you can decrease air you carry to decrease buoyant force
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piaget's stages of cognitive development
- 0-2 sensorimotor: perceive the world using senses (object permanence, things continue to exist even when it is not seen)
- 2-7 preoperational: egocentric, objects can be shown with symbols, learn to speak
- 7-11 concrete operational: things in different shapes are the same (conservation)
- 12 formal operational: learn to reason based on morals, abstract ideas
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cognitive development
learn to understand concepts and to think for oneself
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Schachter Singer theory on emotion
need the physical arousal in addition to cognitive recognition of that arousal to cause emotion
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cannon bard theory of emotion
- emotions result from stimulation of dorsal thalamus
- physiological stimulus is separate and independent; arousal does not have to occur before an emotion
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cognitive behavior therapy
- disorder caused by interactions between thoughts and behaviors and will try to correct the patient's pattern of thoughts
- by taking her to the mall and challenging her her belief that she will not be able to escape
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difference between shaping and extinction of behaviors in operant conditioning
- shaping: increasingly more specific behaviors
- extinction: when previously reinforced behavior is no longer reinforced
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social loafing
individual in group works less than when working alone
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group polarization
- tendency of the group as a whole to make more extreme decisions
- risky shift: if initial position is aggressive, the final position is more aggressive
- cautious shift: if the initial position is conservative, more conservative
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social cognitive theory
- based on people changing based on observation
- lower weight =more success, so the person trying to lose weight want to appear more successful
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self-selection bias
individuals select themselves into groups
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self-serving bias
positive attributes to themselves, neg to the environment
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ethnic groups moving to a more industrialized culture has what kind of mortality and fertility rates
high, high
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conflict theories
- refers to large marginalized group or objection to a dominant cultural norm
- one religion into education, alienating 25% of people of other religions
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shift in signal detection
alarm goes off, and because we're so used to it, we no longer respond to it
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weber's method of discrimination
comparison/differentiating between two quantities
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behaviorist perspective of personality/behavior
behavior is based upon reinforcement and punishment
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psychoanalytic perspective of behavior
unconscious desires of the thrill seeker
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what gives validity for social environment metrics/validate the different groups
need to have a question that can be compared among the different groups
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dissociative disorder
those afflicted moves to a state where they remove themselves from the painful memories
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