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Autism-Vaccine Controversy: Video

By Izzy Kim & Riya Shankar, VI Form and Haley Dion & Laura Drepanos, V Form

Autism-Vaccine Controversy: Video

Editors’ Note: In Advanced Biology, students were encouraged to tell the story that they felt compelled to relate about their Public Health issue (click here for assignment).  In this video, the students integrated a given Case Study with relevant information gathered through independent research. Their integration of the Case Study with additional research reflects an advanced understanding of, and ability to convey, scientific content.

Click on Image for Video

 

Diminishing the Diversity of Devastating Diarrhea

By Geetika Surapaneni, Frances Hornbostel, & Graham Butterfield, III Form with Will Figueroa, V Form

Diminishing the Diversity of Devastating Diarrhea

Please click the image to download/see the poster. Scroll below to see each individual piece.

CLICK ON EACH IMAGE BELOW TO ZOOM TO EACH PIECE OF PROJECT. (more…)

Melatonin’s Effect on Learning and Memory in a Tauopathy Model of Alzheimer’s Disease in Drosophila melanogaster

By Sophie Haugen and Sada Nichols-Worley, VI Form

Melatonin’s Effect on Learning and Memory in a Tauopathy Model of Alzheimer’s Disease in Drosophila melanogaster

Abstract

Alzheimer’s Disease (AD) is a progressive neurodegenerative disease that causes devastating memory loss and cognitive decline in humans. There is no current cure for AD. Research studies show that oxidative stress is correlated to and possibly a cause of this neurodegeneration. Because antioxidants such as melatonin have been found to reduce oxidative stress, melatonin could alleviate neurodegeneration and serve as an effective dietary supplement for people with with AD. In this experiment, a tauopathy Drosophila melanogaster group

Please click on the image to download/see the poster. Zoom in to read specifics.

that express human tau (MAPT) under gal4in neurons were used to model AD in humans. This study measured learning and memory of the Drosophila through an olfactory vortex learning assay in a t-maze. Groups of flies with and without melatonin supplementation were tested in the t-maze. Following experimentation and data collection, preliminary results from this study suggest, but do not confirm, that melatonin reduces memory loss and improves cognitive function in a Drosophila AD model. Further trials are needed to confirm the suggested results.

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Biology: Membrane Structure and Function

By Alex Cardonick, V Form

 

Biology: Membrane Structure and Function

Editors’ Note: In Advanced Biology, students are often evaluated on the reflection of their learning process. They constantly ask themselves questions that demonstrate advanced scholarship such as “How am I connecting each part of my learning into a flowing story?” and “What do I still not understand?” This form of deep reflection is summarized in each student’s ePortfolio at the end of a unit, which includes several different Learning Outcomes ranging from “Dynamic Homeostasis” to “The Central Dogma of Biology.” These Learning Outcomes are often present throughout multiple units, and therefore challenges the students to synthesize information across different areas of focus.

Linked here is Alex Cardonick’s ePortfolio on Learning Outcome 6: Membrane Structure and Function, including four Artifacts of Learning, including text, video, and images.

Introductory Narrative:

Cell membranes act as the “guards” of the cell. Membranes’ structure consists of phospholipids tightly knitted together by their hydrophobic tails, with the hydrophilic heads sticking out on either side. This phospholipid bilayer structure makes membranes semi-permeable; they let small, non-polar molecules such as water and carbon dioxide in, while keeping out large and polar substances such as starch and Iodide anions. In addition, cell membranes can be modified to help cells perform specific functions. Proteins added into the phospholipid structure can create transport channels for molecules that cannot travel through the membrane itself, such as Na+ ions in the nerve impulse. These ions allow a neuron to send a signal in the form of an action potential. Furthermore, molecules and ions can even move against the concentration gradient by active transport when a transport protein and outside energy are provided. This type of movement across a membrane allows essential functions such as the repolarization of the nerve impulse to occur when Sodium-Potassium pumps “reset” the nerve impulse to its resting membrane potential by moving the ions against the concentration gradient. (more…)

Hypoxia: The Forming of Dead Zones

By Rosanna Zhao, V Form, Mary Hoffman, VI Form, and Claire O’Brien, VI Form

Hypoxia: The Forming of Dead Zones

Infographic: https://infograph.venngage.com/ps/l35FghyQ4DM/dead-zone-project

A “Dead Zone” is a region in the ocean in which oxygen concentrations are too low to support healthy marine life. This phenomenon of insufficient oxygen levels is known as hypoxia. Hypoxia is associated with the overabundance of algae which can lead to oxygen deficiency when they cover the water surface and disallow photosynthesis to occur within plants beneath the water. Once a vast body of water becomes hypoxic and oxygen levels drop below 2 ppm DO, a dead zone is formed.

Dead zones occur near coastal regions because the cause of formation is primarily linked with eutrophication. Eutrophication is defined by an excess of nutrient pollution in an open body of water, causing death of animal life due to a deficiency of oxygen. Although nutrients are good for fertilizing plants, nutrient pollution is detrimental to the ocean because it causes chances in the marine ecosystem, resulting in deaths of animals. During the spring and the summer, heavy rain washes nutrients containing nitrogen and phosphorus that farmers use to fertilize their land into streams and rivers. Once these nutrients flow into coastal areas, they stimulate the growth of algae. (more…)

Prep School Youth Coalition for Health Opportunities Infographics: Bronchitis, Altitude Sickness, & Emphysema

By Nathan Laudani, Mary Flathers, and Danny Ciccarello

Prep School Youth Coalition for Health Opportunities Infographics: Bronchitis, Altitude Sickness, & Emphysema

Editor’s Note: In an effort to educate our community on common physiological conditions, the St. Mark’s chapter of the Prep School Youth Coalition for Health Opportunities (PSYCHO) is sponsoring an informational poster competition and invites submissions from all current Biology students. Poster submissions are to explain the science behind an ailment caused by a traumatic event. Posters will be assessed based on informational accuracy, detail, clarity, originality, and workmanship.

 

 

 

 

 

 

 

 

Please scroll down to see FULL and detailed infographics! (more…)