PreparED Study Materials
BSC 116: Principles Biology II
School: University of Alabama - Tuscaloosa
Number of Notes and Study Guides Available: 21
Notes
Study Guides
Videos
Cell Specialization Origins: Ectoderm, Mesoderm & Endoderm Roles
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Discover the origins of specialized cells in embryonic development and learn about the three essential germ layers: ectoderm, mesoderm, and endoderm. Explore how these layers form the foundation for all multicellular life.
Hydrocarbons vs. Organic Molecules: Key Differences
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Discover the differences between hydrocarbons and other organic molecules. While hydrocarbons contain only carbon and hydrogen, other organic molecules integrate more elements and functional groups. This distinction leads to diverse chemical properties and vital biological functions.
Pathogens: Disease-Causing Microbes & Prevention
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Unlock the world of pathogens, the microorganisms causing diseases. Grasp how they invade, colonize, and adversely affect host organisms. Learn about prevention strategies to mitigate their harmful impacts.
Examples of Adaptation: Human Nutrition, Duck's Webbed Feet, Raccoon's
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Discover the concept of adaptation in this video, where we evaluate four scenarios to determine which represents a heritable trait enhancing an organism's survival in its environment. Learn how the webbed feet of a duck exemplify a true adaptation, enabling it to thrive in its habitat.
Balancing Act: How Negative Feedback Loops Maintain Harmony
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Discover the concept of negative feedback loops in biological systems, where balance is maintained by counteracting changes. Explore the four key components: Stimulus, Sensor, Control Center, and Effector, through examples like blood sugar regulation. Uncover how these loops play a crucial role in keeping our body systems in harmony.
Na+ Channels: Open at Resting Potential or Threshold?
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Discover the mechanics of voltage-gated Na+ channels and their role in neuron activity. This video breaks down key neuronal terms like resting potential and threshold to explain precisely when these channels open. You'll come away understanding that voltage-gated Na+ channels open at the threshold state initiating an action potential.