Biology Free Essay Examples And Topic Ideas

Unveiling the Complex World of the Immune System

Words: 1829 Pages: 6 5715

The immune system as a protection against infections from foreign macromolecules or attacks by organisms, including viruses, bacteria, protozoa and parasites. The immune system also plays a role in resistance to body proteins and other molecules such as those that occur in autoimmunity, and against cells that are aerated into tumors. The ability of the immune system to differentiate components of body cells from components of foreign pathogens will sustain the mandate it carries to respond to pathogenic infections, both […]

Immune System Medicine

A Review on Pharmacological and Analytical Aspects of Diosgenin

Words: 650 Pages: 2 4689

The author declared that diosgenin restrains STAT3 signaling pathways, leading to inhibition of multiplication and chemosensitization of liver tumor cells (31). Overexpression of active STAT3 releases diosgenin, tempted to induce apoptosis. Moreover, diosgenin causes the aggregation of cells in the G1 stage of the cell cycle and triggers caspase-3, causing PARP cleavage in HCC [31]. Diosgenin reduces the expression of STAT3-regulated genes including Bcl-2, Mcl-1, cyclin D1, Bcl-2, and VEGF. It also suppresses proliferation, enhances cell accumulation in the G1/G0 […]

Biotechnology

‘Henrietta Lacks’: a Donor’s Immortal Legacy

Words: 397 Pages: 1 5231

The book “Immortal Life of Henrietta Lacks” is a true book of her life experience written by American writer Rebecca Skloot. The book examines Henrietta Lacks, a poor tobacco rancher from the Southern US, whose cervical disease cells were gathered in 1951. Henrietta never knew that she was being so generous .Without her understanding or consent or any monetary pay, these cells were utilized to make an immortal cell line known as HeLa that researchers are utilizing right up 'til […]

Cancer Health Care Henrietta Lacks Medicine Public Health

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Innate Immune Recognition of DNA

Words: 598 Pages: 2 4520

The cGAS is an innate immune sensor that detects double-stranded DNA. Detection of foreign DNA is an evolutionarily conserved mechanism that alerts the host immune system to mount a defense response to pathogen infections. But, there is also a challenging side for the host that how they distinguish the foreign DNA with the much abundant self genome. The presence of self or foreign DNA in the cytoplasm is sensed by eukaryotic cells as a danger signal or a sign of […]

Biotechnology Immune System

What is Viruses?

Words: 1893 Pages: 6 4535

Viruses are pathogens which have harmful effects on bodies. The body has different methods to eliminate them from the body. But some viruses have evasion mechanisms through which they can counteract the effects of the body. They can suppress the effects of the body and survive and propagate in the body. Viruses interact with eukaryotic cells which causes the selection of genes which can block viral replication and propagation. Some viruses suppress apoptotic and necroptotic pathways. Some of them have […]

Biotechnology Immune System Medicine Viruses

Role of P53 Protein in DNA Repair Mechanism

Words: 680 Pages: 2 4884

One of the most known tumor suppressors is p53 which has very low concentration because of short half-life time. Reason for this short half-life is E3 ubiquitin ligase MDM2. MDM2 is one of the genes regulated by transcription which p53 regulates. Increased p53 levels result also increased of MDM2 transcription rate, followed by this, it results the degradation of the p53 protein, forming an autoregulatory circuit in cells. There are various stress situations that can cause this such as telomere […]

Biotechnology Protein

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About the Cellular Basis of Cancer

Words: 1885 Pages: 6 5004

At a cellular basis, cancer cells are not that different from normal cells. In fact, from a biological view point cancer cells originate from normal cells. The features of a cancer cell; such as migrating away from its origin point, mutating and replicating itself, evading cell death and providing itself with a supply of oxygen and nutrients, can all be found in normal healthy cells (Oppenheimer 2006; Tu 2010). However, it is what these cells then do to the surrounding […]

Biotechnology Cancer Medicine

Culture Versus Evolution: Mating Preferences

Words: 3183 Pages: 11 5744

There has been a question to what the purpose of life is. From a biological perspective, the question can be examined in a very simple fashion. The purpose of life is to reproduce and further the species. In order to do this, the human race must acquire quality mates in order for their best chance of survival. In this day and age, however, the qualities may be different than what our ancestors had chosen. So this leads to the question […]

Beauty Competition Culture Sex

What is UV Light?

Words: 1463 Pages: 5 4772

"The visual system is arguably the most important sense that humans have in order to navigate the world around them. The eyes are highly susceptible to UV light, making them a prime target for free radical oxidation of both lipids and proteins, causing cell damage and eventually, cell death. One such disease caused by UV light exposure is called age related macular degeneration (AMD), which is the most common cause of blindness in the United States. This disease is complicated […]

Biotechnology Oxygen Protein

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Homeostasis is a Communicable Infection

Words: 755 Pages: 3 4658

Hepatitis A is a communicable infection of the liver that is caused by the hepatitis A virus (HAV). The virus is usually transmitted from one person to another person who is infected with the virus. Another transmittal route is through the feces of an infected person or contaminated food and water (Linder & Malani, 2017). The disease usually affects anyone, but they are certain groups of people that are at higher risks. Some of these groups include drug users, men […]

Medicine Public Health Vaccine

Guardians of the Cell: the Intricate Ballet of Selective Permeability

Words: 586 1486

In the vast universe of biological phenomena, few concepts are as fundamental as selective permeability. At its essence, selective permeability acts as the guardian of a cell, determining which substances can enter or exit, thus ensuring that the cell's internal environment remains stable and conducive to life. This nuanced balance is the crux upon which cellular function—and by extension, all life—hinges. Imagine, for a moment, a bustling city. Just as city walls in ancient civilizations protected inhabitants from potential threats […]

Should People be Allowed to Keep Pit Bulls: Challenging Stereotypes

Words: 964 Pages: 3 1849

Understanding Pit Bulls: Debunking Stereotypes Furious, deadly, killers, fighters … These are just some of the names that people use to describe Pit Bulls. Although 71% of dog bite fatalities are from pit bulls, are we too quick to judge the dogs? When looking at these numbers, you are just looking at numbers without an explanation. These bites are the effects of a cause. In 2005, a technician reached into a sedated dog’s mouth to find the source of the […]

Animals Dog

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Necrosis and Apoptosis

Words: 744 Pages: 2 4823

The two common types of cellular death are necrosis and apoptosis. Necrosis describes the changes of a cell that happen after a specified area of cell death and cellular self-digestion occur. Necrosis is an an accidental cell death which occurs because of the swelling and bursting of the cell. When a supply of oxygen is cut off from a cell, the needed amount of ATP is not being produced, leading to the cell not working effectively. Ion pumps no longer […]

Medicine

Aminoglycoside-Induced Hair Cell Death and Potential Therapies

Words: 1590 Pages: 5 4464

Introduction Hearing loss is the third most common disorder in the United States, being more prevalent than diabetes or cancer (Blackwell et al., 2014). Our ability to hear is dependent on hair cells that can translate the sounds we hear into electrical impulses that can be interpreted by the brain. When sound waves enter the cochlea located in the inner ear, they deflect the apical portion of hair cells, also known as stereocilia. Stereocilia are connected to one another via […]

Biotechnology Death

Cyclic GMP-AMP Synthase

Words: 385 Pages: 1 4358

Genomic DNA can be damaged by endogenous or environmental stresses. During repair, these short single-stranded DNAs are continuously generated and may leak out to the cytoplasm, where they are generally drawn back into the nucleus by DNA repair and replication factors (RPA and Rad51). Alongside this, TREX1, a cytoplasmic exonuclease, is anchored on the outer nuclear membrane to degrade leaking DNAs immediately. This prevents activation of the cGAS/STING pathway against self DNA. Inhibition of any of the above-mentioned proteins leads […]

Biotechnology Immune System

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Essay about Resistance to Stress

Words: 480 Pages: 2 4213

Caloric restriction extends longevity in yeast because the absence of Tor/Sch9 signaling causes a metabolic change that uses acetic acid, which is similar to the generation and use of ketone bodies, acetoacetic acid, and lower than that of glucose (Wei et al., 2009). High levels of acetic acid promotes apoptosis in yeast and is the primary factor promoting culture acidification, chronological aging, and apoptotic death (Burtner et al., 2009). Tor/Sch9 pathway blocks the utilization of acetate. Tor-Sch9 deficiency extends longevity […]

Biotechnology Stress

The Respiratory System Job

Words: 913 Pages: 3 4350

The respiratory system job is to supply oxygen to all parts of the body. Oxygen is carried through the body by red blood cells. The cells in our body need constant oxygen to stay alive. If not, our brain cells will die after four minutes without oxygen. The process known as breathing consist of inhaling and exhaling, which is the respiratory systems way of taking in oxygen and getting rid of the waste gas, carbon dioxide. If carbon dioxide were […]

Job

Potential Cancer Resistance

Words: 296 Pages: 1 4693

Cancer proliferation is characterized by uncontrolled and unregulated cell growth resulting in tumors. In theory, as the size of organism increases there are more cells developing and dividing meaning that this is an increased probability of cancer development. Although, this response is theorized this is not what actually occurs, but why this trend is observed remains poorly understood. The present study aimed to understand these mechanisms of cancer suppression in large, vertebrate mammals in hopes of gaining insight to human […]

Biotechnology Cancer

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Degradation of Glycogen and Necrotic Cell Death

Words: 662 Pages: 2 4267

PYGL (glycogen phosphorylase) catalyzes degradation of glycogen and therefore allows it to be used as an energy source. The researchers were unable to obtain PYGL antibodies to further study the RIP3/PYGL interaction in necrosis. However, the interaction was induced by TNF but not zVAD. They incubated flag RIP3 missing glutathione S-transferase, which did not enhance PYGL activity and could only determine that RIP3 activates PYGL. They measured PYGL activity in N cells, RIP1 knockdown and RIP3 knockdown without and without […]

Biotechnology Death

Senescent Cells and Ageing: Unraveling the Mysteries of Zombie Cells

Words: 1850 Pages: 6 5248

Senescent cells are somatic cells, other than reproductive cells, that can no longer divide, but are resistant to apoptosis (Scudellari, 2017). Although these cells have no use, they do not die off, which gives them their trivial name of “zombie cells”. Zombie cells can exist in various parts of the body, and they all have their own specific resistance to apoptosis, express different extracellular proteins, and secrete different variations of molecules such as cytokines (Scudellari, 2017). This senescence secretion activity […]

Biotechnology

Signal Transducer and Activators of Transcription

Words: 1035 Pages: 3 4254

Abstract Signal transducer and activators of transcription (STAT) protein are cytoplasmic transcription factor that have been known for cell tumor proliferation, survival, invasion, apoptosis and immune response. Each of these STAT family protein have a role and function when they are interacting with the cell in the human body. Among all of the STAT family protein the most important one is the STAT3. STAT3 is involved with many diseases as well as cancer. And the involvement it has with it […]

Biotechnology Immune System

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Who Believe that Darwinism is the Backbone of Social Theory

Words: 431 Pages: 1 4682

It has been extensively argued that homosexuality could possibly have a biological origin; however, it seems to contradict the Darwinian logic of reproductive success. Charles Darwin taught that evolution is possible due to the fact that natural selection acts solely by taking advantage of modest, yet superior, variations in individuals. Homosexuality is troubling for those who believe that Darwinism is the backbone of social theory, specifically psychologists, as social theory requires Darwinism to be completely and thoroughly understood. Homosexuality contradicts […]

Human Sexuality Sex Sexual Orientation Theory

Interactions between Magnetic Nanoparticles and a Static Magnetic Field

Words: 279 Pages: 1 4524

"In this presentation, we reviewed some basic concepts regarding the interactions between magnetic nanoparticles and a static or time-varying external magnetic field. We showed how these pertain to current biomedical applications of magnetic nanoparticles. The focus was, in particular, on magnetic separation and drug delivery, although these are only two of the many biomedical applications of magnetic nanoparticles currently being explored. For example, there's magnetic twisting cytometry, a process in which ferromagnetic microspheres are bound to specific receptors on a […]

Biotechnology Cancer Medicine

Body of Depression

Words: 1604 Pages: 5 6499

Abstract This research article is about depression. It includes peer reviewed articles, an online website, and video from Ted.com. These resources help better understand depression. It discusses the pathophysiology of the disorder and how chemical imbalances of serotonin, dopamine, and norepinephrine contribute to depression. A holistic approach is necessary to properly treat depression due to the many facets. Depression can complicate or start other debilitating conditions such as heart disease and cancer . There are limited tests for diagnosis and […]

Clinical Psychology Depression Mental Disorder

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Coming Home again Summary

Words: 739 Pages: 2 5789

A self-portraying article by Korean-American writer Chang-rae Lee, distributed in the New Yorker back in 1995, is the flash for Wayne Wang's exceptionally close to home mother-child show Coming Home Again. Lee is credited as co-screenwriter of the film, which depicts the manner in which a youthful author named Chang-rae drops his normal everyday employment and sweetheart in New York to deal with his mom, who is gradually biting the dust of stomach disease. Shot in a light-filled San Francisco […]

Art Cancer Disease New York City

My Favorite Season

Words: 661 Pages: 2 6643

The weather in summer is very warm and sunny. You can go to the river, to the outdoor pool and swim there. But there are also rains in summer. The rains are small and warm, such rains are called mushroom rains. But on one holiday “Trinity” there was a heavy downpour that even in all the villages the lights were turned off. I was very scared then, but my mother says: “don't be afraid, everything will be fine”. The weather […]

Animals Person Rain Water

The Marvel of the Amniotic Egg

Words: 515 1496

The natural world offers us many wonders that have evolved over millions of years to provide species with the best chances of survival. One such evolutionary marvel is the amniotic egg. At first glance, an egg might seem like a simple structure, but the amniotic egg, in particular, has played a pivotal role in the evolutionary success of many terrestrial animals, providing a protective environment for the developing embryo. First, it’s essential to recognize what sets the amniotic egg apart. […]

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Saving an Endangered Epecies: the Question of Ethics

Words: 1273 Pages: 4 5168

The amount of gene disorders in American has risen significantly over the past few years. According to Global Genes, “rare diseases affect one in [every] ten Americans.” From this statistic, it is fairly assumed that 30 million people have a rare disease in the United States alone (Global Genes). Food and Drug Administration processes are long and expensive. The waiting time to get a new medication or therapy approved is too long to keep up with the newly emerging health […]

Endangered Species Ethics

Endangered Species: Gila Woodpecker

Words: 725 Pages: 2 5263

The Gila Woodpecker is one of many types of woodpeckers. This bird has an average lifetime of 10 years and the females tend to lay 3-5 eggs (1). The highest population density of the woodpecker is in the Sonoran Desert. Their water is scarce, and they are hunted by different types of animals. The main predators include a fox, bobcat, and coyote(2). The Gila Woodpecker is one of the most innovative birds. They use their long beaks to create small […]

Endangered Species Environmental Impact Nature

Endangered Species Recovery Efforts

Words: 6790 Pages: 23 5459

Background Reintroduction, the intentional movement of an organism into a part of its native range following its extirpation, is a common strategy in the conservation of threatened and endangered species (IUCN, 2013; Soorae, 2018). However, the success of this strategy in the past has been variable (Griffith, et al., 1989; Fischer & Lindenmayer, 2000; Wolf, et al., 1996), leading to calls for greater understanding of target species’ establishment and persistence requirements (Armstrong & Seddon, 2008; Seddon, et al., 2007). Habitat […]

Animals Endangered Species Nature

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