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9 Cards in this Set
- Front
- Back
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Tissues are a functional group of....
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cells of the same structure
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rgans are functional structures made of
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all four animal tissue types.
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levels of organization
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cell > tissue > organ > organ system > organism ... > population > etc.
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Muscle irritibility (contraction/relaxation) is achieved through
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chemical stimulation, and providing ATP for muscle contraction. Protein fibers within muscle cells constrict sections of cells, or let go and relax sections of cells. A "sarcoplasm" is a contractile unit of a muscle cell.
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Early Embryonic Development
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Upon fertilization, a zygote goes through several similar early developmental stages. The first distinguishable layers of cells are found in the gastrula.
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Parthenogenesis
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"virgin birth"
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Hermapthordites
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Some animals are either synchronous or sequential hermaphrodites
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process of gastrulation
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- Protostomes (first opening is the mouth) and Deuterostomes (second opening is the mouth)
- Note early linings (embryonic tissues) of the gastrula. |
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Negative and Positive biofeedbacks.
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- Many good examples of negative biofeedbacks.
- A good example of a positive biofeedback is embryonic hCG stimulation of Progesterone and Estrodiol (estrogen) |
