PreparED Study Materials
Notes
Videos
Unlocking Atomic Reactivity: The Role of Unpaired Electrons Explained.
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the fundamentals of atomic reactivity by evaluating the influence of electron shells, orbitals, and energy levels. This video highlights the pivotal role unpaired electrons play in determining how and why elements react, making it a cornerstone for chemistry enthusiasts.
Langerhans Cells: Stratum Spinosum, Corneum, Granulosum, or Basale?
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover the role and location of Langerhans cells key components of the human immune system found in the skin. Learn about the different layers of the skin and where these cells predominantly reside. By the end of the video you'll know that Langerhans cells are mainly found in the Stratum Spinosum layer
The Three-Domain System: Carl Woese's Life Classification
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the influential Three-Domain System of classification, introduced by Carl Woese in 1978. Discover how it categorizes life into Bacteria, Archaea, and Eukarya based on distinctive cellular structures. Learn about the characteristics of each domain, from prokaryotic Bacteria and Archaea to the rich diversity within Eukarya, encompassing Protists, Fungi, Plants, Animals, and the unique world of viruses.
Cortical Reaction in Sea Urchin Eggs: Fertilization Myths & Realities
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover the complex world of sea urchin reproduction, focusing on the essential role the cortical reaction plays in egg fertilization. Uncover common myths surrounding this process and learn what actually happens at the cellular level. Gain insight into how the formation of a fertilization envelope is crucial for successful fertilization.
Proprioceptors Exclude: Spindles, Tendons, Discs, or Joints?
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the world of proprioceptors specialized sensory receptors in joints muscles and tendons that help us sense body movement and position. Understand the key types such as muscle spindles tendon organs and joint kinesthetic receptors. Learn why tactile discs are not considered proprioceptors even though they are sensory receptors
Understanding Mouse Coat Colors Through Dihybrid Cross Predictions
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Learn about mouse genetics and the implications of dominant and recessive genes on coat color. We'll use a Punnett square to predict offspring coat patterns by crossing two heterozygous mice. Learn how phenotype ratios like 9 Agouti: 4 white: 3 black help us understand genetic outcomes.


















