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Stress and the Brain

There are two main types of stress. Eustress, which is positive stress and distress, which is negative stress. Eustress is the most … See more

Actived: 9 days ago

URL: https://letstalkscience.ca/educational-resources/backgrounders/stress-and-brain

Introduction to Homeostasis and Regulation

WebTED-ED (2014) by Emma Bryce (3:24 min.). This introduction to homeostasis and regulation in the human body is really only a small glimpse into the …

Category: Health Go Health

The Science Behind Calories and Nutrition Facts Labels

WebThese main nutrients are fats ( lipids ), proteins and carbohydrates. Some calories you consume every day should come from each of the three nutrients. About 50 to 60% of …

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The Immune Response

WebThe adaptive immune response involves two main types of specialized white blood cells called lymphocytes - B cells and T cells. B cells are found in the blood. Their …

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Osmosis and Its Role in Human Biology and Health

WebKeeping the body's conditions stable makes it possible for living things to survive. Osmosis plays an important role in the human body, especially in the gastro …

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Radiation Effects on the Body

WebHigh doses of radiation over short periods of time produce acute (severe), short-term effects. High doses of radiation tend to kill cells. This damages tissues and …

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What is Sound and How do we Hear it

WebAfter all, what goes on inside your ears is what allows you to hear. For example, when a person talks, the movement of their mouth creates waves of moving air. These sound …

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What are the Different Types of Radiation

WebThere are seven natural forms of EMR. Gamma rays have the highest energy and shortest wavelength. Then come X-rays, ultraviolet light, visible light, infrared …

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Spaceflight and Bone Loss

WebIt is also the key to why astronauts experience bone loss in space. In space, astronauts experience spaceflight osteopenia. This condition can cause astronauts to …

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Using Plants to Make Medicines

WebIn the country we now call Canada, Indigenous Peoples have used plants, trees and other natural materials as medicines to treat scurvy and other illnesses. …

Category: Medicine Go Health

The Surprising Reason You Feel Awful When You're Sick

WebWhen you’re sick, you might also feel grumpy or sad. That’s because the macrophages fighting the infection in your body send out cytokines. These cytokines can affect the …

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Does Living Near High-Voltage Power Lines Cause Cancer

WebIt can also be represented as kg⋅s −2 ⋅A −1. Scientists normally report data in millionths of a tesla, or microteslas (µT). Some people living near high-voltage power …

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Humans and Freshwater Ecosystems

WebMany living things depend on freshwater ecosystems. Many people recognize the value of lakes, rivers and wetlands. Governments are writing laws and regulations to protect …

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Gamma Rays: Helper or Hazard

WebWavelengths where atmospheric windows occur (Let’s Talk Science using an image by NASA (original); SVG by Mysid via Wikimedia Commons).. In 1967, the OSO-3 …

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The Chemistry of Redheads

WebThe chemical pigment responsible for hair and skin colour is called melanin. Cells called melanocytes use instructions from your DNA to create melanin. They create …

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Should We Eat Bugs

WebBugs feed about 2 billion people each day. They also hold promise for food security and sustainability. The roasted crickets were tasty. But the feeling of tiny legs on my tongue …

Category: Food Go Health