!["Cell Defenses and the Sunshine Vitamin" Article Summary [Biology notes]](http://intensecogitation.info/wp-content/uploads/thumb-cache/28ab03a585bf9eb7a8153d4a7dbbf082-2da725eab29d08d9864968c63fa4e941-149x200-75-nocrop.jpg)
As part of our unit on human nutrition for IB Biology, we were asked to read and summarize an article from Scientific American on the effect of Vitamin D on human cells and its relation to human diseases. The following is a relatively succinct one page summary of the article: This article explores the formation [...Read more...]
![6.2 The Transport System [Biology Notes]](http://intensecogitation.info/wp-content/uploads/thumb-cache/4a1937e678051dde886d657900e5a189-e41cd105b2ff88cc153e94a6eca5b3da-200x157-6-nocrop.png)
Definitions: atria – collecting chambers, collect blood from veins ventricles – pumping chambers, pump blood to arteries at high pressure cardiac cycle – atria fill, then contract and blood goes to ventricles. Ventricles fill, then contract and blood goes to the right to the lungs (via pulmonary vessels) and left to the body (via aorta) [...Read more...]
![The Effect of Stretching on Aerobic Exercise Heart Rate Experiment [Biology notes]](http://intensecogitation.info/wp-content/uploads/2010/08/080310_0315_TheEffectof1.png)
This is a Biology internal assessment that led to my overall grade of a 7 in Biology SL. It tests the effect of exercise and stretching on human heart rate. DESIGN Introduction: Aerobic exercise is essentially an extended activity that involves major muscle groups and increases in respiratory and heart rate. Stair climbing is an [...Read more...]
![Topic 6.1 Digestion [Biology notes]](http://intensecogitation.info/wp-content/uploads/thumb-cache/456d540c26f58bdbdc6b4464e9c48025-cf5c94f369dec2d214dc5a5c46d990a1-144x200-6-nocrop.png)
6.1 Digestion Definitions Ingestion: taking food into body cavity. Digestion: converting food from insoluble to soluble form. It is a process where complex foodstuffs are broken down into small soluble molecules that can pass across cell membranes. Absorption: nutrients passing through a layer of cells into the body’s tissues through villi and microvilli Assimilation: incorporating [...Read more...]
![The Distinctive Causes and Symptoms of Neural Disorders Caused by Misfolded Prions [Biology Notes]](http://intensecogitation.info/wp-content/uploads/thumb-cache/4774ff79c209ff37e4864ecc39ecccbf-3f3c96ca85f9ad43bc8e771fe8aa9a7d-200x160-75-nocrop.jpg)
This resource may be useful as an introductory article to prions in IB Biology. 1) Introduction The protein-only theory postulates that a group of neural disorders called transmissible spongiform encephalopathies (TSEs) are not caused not by typical viruses or bacteria, but rather by deformed proteinaceous infectious particles called prions (Lindquist, 1999). In particular, these neurodegenerative [...Read more...]
IB Biology exam revision has historically been an issue around exam time due to the lack of legitimate resources–for instance, there are few decent textbooks for IB Biology specifically, and there is essentially only one notable study guide. More or less, here are the current book resources available to IB resources: (course companion and study [...Read more...]
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