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wvu bio 117 final exam material questions with 100
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Biology 117
Biology 117
Biology 117
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wvu bio 117 final exam material
rosscurrent exchange
water going in both directions for gills
keeps diffusion at a high rate
fish move forward, water going front to back, blood goes other
spiracles
holes insects breathe through
tracheal systems
organisms with no lungs have this
terrestrial mammals
lungs are "wet" meaning that oxygen has to be dissolved in water to be used
hemoglobin
major protein found in red blood cells that can bind up to four molecules of oxygen
cooperative binding
loss of oxygen in a hemoglobin
does not let go until -70 mm Hg
once some oxygen leaves, a whole bunch leaves, speeds up
lymphatic system
second set of vessels that run through our bodies and picks up interstitial fluid (15%)
sinoatrial node
cells are self exciteable and generate their own electrical signals
is where pacemakers are placed
atrioventricular node
receives signals from sinoatrial node and delays contraction
autocrine signal
sends and receives signals to the same cell
paracrine signals
signal released by the cell a short distance to the cells around it
endocrine signals
signals carried by blood to a far away cell
neural signals
chemical message sent a short distance between two neurons
neuroendocrine signals
neuron releases chemical signal into the blood stream to affect a far away cell
pheromones
signal released outside the body intended to be picked up by a separate individual
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