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Exam (elaborations)

BIOB34 Final Exam Questions and Correct Answers

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Outside vertebrates, the animal with the highest brain:body ratio is... Ans ... octopi Lack Neurons: Ans No nervous system (songes and placozoas) Nerve Net: Ans Uniformly distributed neurons (Cnidarians, jellyfish) Centralized Nervous System: Ans Centralized in one spot, usually head. Usuall...

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  • July 30, 2024
  • 17
  • 2023/2024
  • Exam (elaborations)
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  • BIOB34
  • BIOB34
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BIOB34 Final Exam Questions and Correct Answers Outside vertebrates, the animal with the highest brain:body ratio is... Ans ... octopi Lack Neurons: Ans No nervous system (songes and placozoas) Nerve Net: Ans Uniformly distributed neurons (Cnidarians, jellyfish) Centralized Nervous System: Ans Centralized in one spot, usually head. Usually bilateral body symmetry (Chordates, spiders, insects, and molluscs) Nervous system is not independent of influence as seen in... Ans ... migratory bats which lose mass from neocortex to reduce weight Sponges can signal porocytes to turn off without neurons by using... Ans ... syncytium, a single multinucleate sheet Reflex Only Principle: Ans Neuron al detection causes instant and unconscious movement Cephalization: Ans Develop brain in head (anterior) of animal Dendrites: Ans Collect electrical signals Cell Body (Soma): Ans Integrates input and generates output to axon Axon: Ans Conducts electric signal to presynaptic terminal Presynaptic Terminal: Ans Transmits signal to next cell All cells have an electric potential, but neurons... Ans ... change theirs ECF is rich in... Ans ... Na and Cl ICF is rich in... Ans ... K If ions were able to freely move across membrane... Ans ... there'd be no membrane potential Equilibrium Potential: Ans When concentration gradient force and electrical force balance out Nernst Equation:

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