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thinkrussia
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Female parts of the typical flower
stigma, style, pistil, ovules
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GH (aka)
- Growth hormone: (somatotropin)
- Promotes bone and muscle growth
- Over production of GH in adults causes acromegaly....overgrowth of bone
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G1 phase
growth occurs as organelles double
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Interkinesis
occurs betweeen telophase 1 and prophase 2
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Ribosomal Subunits
- 3 o s -binds to 5'end of mRNA
- 5 o s- (2-3 sites to receive tRNA)
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Chargaff's rules
- A pairs with G etc.
- C pairs with T
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In a Hardy weinberg equil...the freq. of dominant allele D is 3 times that of recessive d. What is the frequency of heterozygotes
- p=3q and p+q=1
- so 4q=1
- then q=.025 and p=.75
- 2(.025)(.75)=.375 or 37.5%
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Acrosome
A vesicle at sperm's top that helps it penetrate egg
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Rods
- night vision
- use rhodopsin as pigment (absorbs single wavelength)
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Outer Ear
the auricle (external ear) and the auditory canal
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Invert ns. Cnidaria
- simple ns ---nerve net
- limited centralization
- some jellyfish have clusters of cells that coordinate swimming
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smooth muscle
- one centrally located nucleus
- no striations
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a Release (in terms of behavior)
stimulus eliciting the behavior
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Spontaneous Recovery
- when stimulus no longer applied the response recovers overtime.
- Also can be the recovery of a conditioned response after extinction
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Pseudoconditioning
a "neutral" stimuli is able to elicit the response even before conditioning, and hence is not really a neutral stimulus
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Extinction (when referring to behavior)
gradual elimination of conditioned responses in absence of reinforcement "unlearning"
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Stimulus Generalization
ability of a conditioned organism to respond to stimuli which are similar
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Stimulus Generalization Gradient
following conditioning--stimuli more dissimilar to original conditioned stimulus elicits responses with dec. magnitude
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Axon
transmits pulses away
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Soma
cell body of neuron contains nucleus
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Vestigial structures
structures that appear to be useless but had some ancestral function (ex. appendix, coccyx--useless bones at base of spine)
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Lytic Cycle
phage DNA reproduces itself using bacterum's genetic machinery and manufactures numerous progeny which then kill the cell (many lysed cells together can form a plaque)
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Ribosome composition
2 subunits that bind only during protein synthesis
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Amino Acyl- tRNA synthetase
bind both the aa and its corresponding tRNA to form an amino acyl -tRNA complex
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