Category: Biology

Shampoo Science: “Dirty” Hair and What Those Ingredients Actually Do

For the average person, washing their hair every day or every few days is a matter of hygienic preference rather than necessity. Unless their work or pastime brings them in contact with dirt or involves physical exertion, it is unlikely that their hair would go from being clean to truly dirty in the span of twenty-four hours.

So, what is the true science behind our “dirty” hair and the ingredients in our shampoo?

Infant Developmental Milestones: High-Yield USMLE Points

When does a baby say its first words, Mama and Dada? When does a baby learn to stand up and walk on its own? Is it normal for an infant to develop stranger anxiety at 9 months? In this quick and easy-to-understand lesson, we review the infant developmental milestones at 1 month, 6 months, 9 months, 12 months, 2 years, 3 years, and 4 years. This lesson includes high-yield USMLE quick take-home points, high yield summaries, and practice test questions/answers on infant developmental milestones.

Circulatory System: Heart Structures and Functions

Circulatory System: Heart Structures and Functions; Blood flows through the heart in the following order: body –>inferior/superior vena cava –> right atrium –> tricuspid valve –> right ventricle –> pulmonary arteries –> lungs –> pulmonary veins –> left atrium –> mitral valve –> left ventricle –> aortic valve –> aorta –> body…

Is COVID-19 Going to Resurge in the Winter?

370,000 deaths. 6,000,000 confirmed. 188 countries affected. The novel COVID-19 is leaving astonishing traces of deaths and illnesses as it rapidly encroaches upon our everyday lives. Schools are closed. Unemployment is surging. People experience dreadful losses of their family and friends. Luckily, however, the exponential curve of COVID-19 […]

Rewilding and Not So Wildlife

The basics of rewilding (at least in North America) are the Three C’s: Cores, Corridors, and Carnivores. Rewilding was developed in the 1990’s as a new approach to ecological restoration. Proponents have characterized it as being active rather than reactive. What this means is that instead of viewing conservation as stemming a tide or becoming shepherds to ever-declining animal populations, rewilding is focused on restoring the equilibrium of ecological systems. This is accomplished through a variety of methods that are grouped together under the Three C’s.

What are Vitamins?: Definition, Functions, and Health Benefits

Vitamins and minerals both help our bodies work properly, and they aid with functions such as growth and development. So what is the difference between the two? Simply stated, vitamins are organic and minerals are inorganic. This means that vitamins come from living sources, like plants and animals, while minerals come from elsewhere, such as the earth. Vitamins tend to have more complex structures than minerals, and because of this, are more prone to degradation via heat or chemicals. Today, we will be focusing on vitamins.

An Introduction to Skeletal Muscles: Properties and Physiology

The muscular system allows us to move and do our daily tasks. It also provides heat, stability, and blood flow for our body. There are three main types of muscular tissue: cardiac muscle, which comprises the heart muscle, smooth muscle, which comprises the linings of organs, and skeletal muscle, which are the muscles that help our body move. This article will focus on the physiology of skeletal muscles.

An Overview of Shorthand: History and Types of Shorthand

Shorthand is the use of abbreviated spellings and or simplified symbols to record information in a quicker, more compact form. The opposite of this is longhand, which generally uses either block lettering or a cursive script. While it takes longer to fully write something out in longhand, all or most of those fluent in a given language will understand what is written down, as opposed to shorthand, which requires special training. In light of modern recording and word processing technologies, the decline in shorthand’s use seems inevitable, with newer inventions allowing those who only known longhand to reap the benefits of shorthand. And yet several shorthand systems thrive in a few niche industries. To fully appreciate shorthand and its resilience, one must go back to its origins.

Macroeconomics: The Definition of GDP and Its Implications

GDP is the universal measure of income among different countries. We’ve heard of the term GDP multiple times, but what exactly is GDP, and how do we measure an entire country’s income? GDP, Gross Domestic Product, measures the total value of all final goods and services produced in the economy of a country during a given year. Important points that need special attention in the definition of GDP are ‘total,’ ‘final,’ ‘country,’ and ‘a given year.’

Freud’s Psychology: Psychoanalysis, Id Ego Superego, and Dream Interpretation

Chances are, you’ve heard of the Oedipus complex or the idea that your dreams reveal your inner desires. The creator of these ideas was Sigmund Freud, an Austrian neurologist and the founding father of psychoanalysis. His ideas and theories still remain very influential in the fields of psychology, psychiatry, and psychotherapy, and their impact can even be seen in the visual arts and humanities.

How the Environment Responded to Covid-19

The coronavirus pandemic may seem like one of the worst things that could be happening to the world right now. And although that might be the case for us, the environment is finally getting the break from human activity that it’s been longing for. With businesses shut down, traveling banned, and everyone in lockdown, traffic and pollution have been significantly reduced and it’s had some notable effects on nature. So while you’re stuck being quarantined, here are some cool things happening around the world as a result.

Can Vaping Increase COVID-19 Susceptibility?

It is widely known that the elderly and the immunocompromised are at the highest risk of being severely impacted by COVID-19, a virus that targets the lungs and respiratory system. The younger demographic, including teenagers, are not generally considered as being threatened by this disease. Even if teenagers do contract the virus, it is assumed that they will only experience mild symptoms and will recover quickly. However, vaping, an activity especially popular among teenagers, may increase their vulnerability to COVID-19. COVID-19 and vaping are similar threats in that not much is known about either of them, but both are recognized as possibly life-threatening. The safest choice to make in this time of uncertainty is to avoid anything that may cause the situation to be more dangerous, and until more information surfaces, that includes vaping.