Biology Free Essay Examples And Topic Ideas

Diabetes and Homeostatic Control

Words: 507 Pages: 2 6515

Homeostasis is a fundamental concept in physiology, referring to the body’s ability to maintain a stable internal environment despite external changes. This principle is crucial for survival, ensuring that essential bodily functions operate within a narrow range. Key parameters that must remain constant include body temperature, blood pressure, and the concentration of various chemicals in the blood. When homeostasis is disrupted, it can lead to significant health issues. One condition where homeostasis plays a critical role is diabetes mellitus, a […]

Circulatory System Diabetes Insulin Medicine

Animal Breathing: Evolution’s Design

Words: 870 Pages: 3 5419

The complexity and diversity of respiratory systems across the animal kingdom offer a fascinating glimpse into the evolutionary adaptations that have enabled organisms to thrive in various environments. Every living creature, whether a simple microorganism or a complex mammal, requires a mechanism to obtain oxygen, expel waste, and metabolize food for energy production. This essay delves into the various respiratory systems found in the animal kingdom, illustrating the remarkable ways in which life has adapted to meet these essential needs. […]

Endangered Species: Turtle Habitat Program

Words: 586 Pages: 2 6479

Conservation Need: Sea turtle habitats, particularly in the Gulf of Mexico and the Savannah, Georgia area, are facing severe threats. Once thriving, these habitats have suffered significant losses, with approximately five species of sea turtles disappearing from over 53% of their original wetland territories. The urgent need for conservation stems from critical environmental degradation factors, including pollution, coastal development, and human interference, which have significantly reduced the quality and availability of these vital habitats. Performance Targets: A comprehensive conservation strategy […]

Endangered Species Environmental Impact Human Nature

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The Fascinating Life of Butterflies: Unveiling Nature’s Metamorphosis

Words: 782 Pages: 3 6893

Introduction Butterflies, with their vibrant colors and delicate wings, have long captured the imagination of humans. From small children chasing them with nets to serious scientists meticulously studying their transformations, butterflies continue to intrigue and enchant us. This fascination is evident in the fact that one of the largest collections in the Natural History Museum is dedicated to Lepidoptera, encompassing butterflies and moths, with 10 million specimens. Each butterfly tells a unique story about the world around it, offering insights […]

Animals Nature

Henrietta Lacks – Scientist

Words: 2322 Pages: 8 6151

Although Henrietta Lacks died 65 years ago, her cells known as the HeLa line, live on, propelling scientific advances around the world. After their discovery, HeLa cells enabled the development of in vitro fertilization, the first clone of a human cell, the development of the polio vaccine, advances in gene mapping, and so much more. However, prior to the publishing of Rebecca Skloot’s The Immortal Life of Henrietta Lacks, few people knew the source of the HeLa cells. Skloot’s book […]

Henrietta Lacks Medicine

Diosgenin in Colon Cancer

Words: 878 Pages: 3 5658

The author noted that diosgenin constrains the 3-hydroxy-3-methylglutaryl CoA reductase expression and stimulates apoptosis in human colon tumor cells. Diosgenin is also a potent inhibitor of HCT-116 with growth inhibition and induction of apoptosis [39]. Diosgenin induces apoptosis via the cyclooxygenase-2 and 5-lipoxygenase pathways in HT-29 and HCT-116 [40]. The author described diosgenin's ability to enhance 5-LOX activity; its inhibition by AA-861 notably reduces the apoptosis of colorectal tumor cells. Moreover, colorectal carcinoma cells expressing COX-2 are less sensitive to […]

Biotechnology Cancer

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Alcohol in Moderation

Words: 394 Pages: 1 5574

Alcohol, in moderation, can have positive health benefits, but when it is drunk in excess, it can negatively influence the body. (1) Alcohol can have an altering effect on the liver cell structure. When these cells are permanently changed, it affects the liver's ability to metabolize fat, which can lead to the development of a fatty liver. (2) The brain cells are also influenced when alcohol is introduced into the body. Brain cells are killed with excessive drinking, and it […]

Alcohol Alcohol Abuse Alcoholism Malnutrition Medicine Nutrition

Cancer is a Vast Disease Category

Words: 2004 Pages: 7 6566

Abstract Cancer is a vast disease category that requires constant research for a cure. Over the decades, different treatment plans have arisen to try and combat the range of cancer cells. Some treatment has resulted in success, some end in death, and others are still an ongoing battle for the patients. Anti-cancer drugs have many side effects that come with them such as fatigue, inflammation, infection, and necrosis of cancerous cells. Cancer medicine has come a long way and now […]

Biotechnology Cancer Disease Medicine

The Dance of Molecules: Reactants in Cellular Respiration

Words: 550 2511

If one were to observe the bustling world inside our cells, it would rival the most intricate ballet or the busiest of city streets. At the heart of this choreography lies cellular respiration, the metabolic pathway that provides energy to power this cellular world. In a harmonious dance, specific reactants come together and undergo a series of reactions to produce the precious molecule ATP, the cell's primary energy currency. But what exactly are these reactants, and why are they so […]

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Biology of Sexual Orientation

Words: 1000 Pages: 3 5662

Sexual orientation represents one of the most distinct gender differences observed within the animal kingdom. Introduction It is a fundamental aspect of human behavior, with the vast majority of individuals identifying as heterosexual. This norm, however, does not encompass the entirety of human experience, as a significant minority, estimated between 2% and 6%, report predominantly homosexual attractions (Diamond, 1993). Understanding the biological basis of sexual orientation has long been a subject of scientific inquiry, providing insights into the complex interplay […]

Culture Gender Human Sexuality Sex Sexual Orientation

Respiratory Distress and Failure: a Medical Overview

Words: 919 Pages: 3 6230

Respiratory distress and failure are critical conditions that demand immediate attention and precise intervention, especially within emergency medical services. Introduction These conditions arise when the body's respiratory system struggles or fails to maintain adequate gas exchange, leading to insufficient oxygen levels in the blood. This essay delves into the intricacies of respiratory distress and failure, exploring their symptoms, underlying causes, and the vital role of emergency medical technicians (EMTs) in managing these life-threatening situations. By examining the distinctions between respiratory […]

Sepsis and Homeostasis

Words: 529 Pages: 2 6283

According to the Gale Encyclopedia of Nursing and Allied Health, Sepsis is a systemic infection that spreads rapidly through the bloodstream and body tissues. Sepsis develops as a result of a massive immune response to bacterial infection that begins as a localized infection, but then spreads into the bloodstream. (Oberleitner & Culvert, 2018) Normal immune and physiologic responses eradicate pathogens, and the pathophysiology of sepsis is due to the inappropriate regulation of these normal reactions (Stearns-Kurosawa, Osuchowski, Valentine & Remick, […]

Immune System Medicine

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Mitochondrial Dysfunction in Leukocytes from PCOS

Words: 730 Pages: 2 5554

Mitochondrial dysfunction in leukocytes from PCOS women with insulin resistance was evident by a decrease in mitochondria oxygen (O2) consumption. This was indicated by an increase in ROS production, the oxidized glutathione/glutathione ratio, and TNF? levels, as well as a decrease in mitochondrial membrane potential. Additionally, a defect was observed in the activity of complex I of the mitochondria, which may contribute to the oxidative stress evident in these PCOS women [72]. Furthermore, PCOS women with IR exhibited impaired endothelium […]

Biotechnology Exercise

Foreign Aid and Micro-entrepreneurship Microfinance Sustainability and Complementary Programs

Words: 1085 Pages: 4 5702

Cross-borrowing enables clients to collect more money from various institutions without close inspection, and the number of applicants for microfinance has rocketed due to cross-borrowing. This has caused new problems for the microfinance sector. The purpose of achieving self-financial sustainability did not have a positive outcome. Because of the poor portfolios of the clients, MFIs could not demand repayment of the debts from the borrowers. Cross-borrowing also deteriorated the financial situation of the poor and trapped them in the cycle […]

Sustainability

Diffuse Intrinsic Pontine Gliomas

Words: 3372 Pages: 11 5425

Introduction/Epidemiology A diffuse intrinsic pontine glioma (DIPG), is a malignant tumor of the pons of the brainstem that originates in the supportive tissue called the glia. Specifically, these tumors are diffuse astrocytomas meaning that the tumor develops from astroglial cells of the brain stem. This tumor accounts for about 10%-20% of all brain tumors in children and roughly 80% of the 300-400 pediatric brainstem tumors that are diagnosed each year. The majority of children who develop this tumor type are […]

Biotechnology Cancer Immune System

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Facts about Cells

Words: 333 Pages: 1 5982

All living cells will eventually decay and die. There are two recognized types of cell death: apoptosis and necrosis. Apoptosis refers to the “self-destruction” of a cell by its own mechanisms. Typically, a cell will undergo apoptosis when it is no longer able to repair itself. This could result from a number of possible cell injuries including viral infection, mutation, protein dysfunction, and DNA damage by way of free radicals. Apoptosis is implemented by enzymes called caspases, which have the […]

Medicine

The Delicate Dance of Life: Unraveling the Mystery of Birth

Words: 626 2533

There are moments in life that spark insatiable curiosity, and few questions resonate as universally as, "Where do babies come from?" While many a parent has pondered how best to answer this when posed by a young child, the reality is that the genesis of human life is both a scientific marvel and a philosophical wonder. At the heart of the biological explanation is the union of two distinct cells: the sperm from the father and the egg from the […]

The Enigma of the Dracula Monkey: Nature’s Mysterious Marvels

Words: 503 2439

In the dense, layered canopies of the Southeast Asian rainforests, an elusive and rather unusual primate goes about its daily activities, virtually unseen by the human eye. Aptly nicknamed the "Dracula monkey," the Nycticebus coucang, or the slow loris, is not just another adorable face in the animal kingdom. Behind those wide, innocuous eyes lies a fascinating story of evolution, survival, and mystery that's captured the curiosity of scientists and nature enthusiasts alike. The slow loris, despite its innocent appearance, […]

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The Unsettling Realism of “Never Let me Go”

Words: 726 Pages: 2 2984

Science fiction films often depict advanced technologies and societal transformations in futuristic worlds. This imaginative leap, while intriguing, often lacks the emotional resonance needed to deeply engage viewers, as the characters and their environments are too detached from our own reality. However, the 2010 film "Never Let Me Go," adapted from Kazuo Ishiguro's 2005 novel, offers a stark contrast. Set between the 1970s and 1990s, it presents a hauntingly familiar world, thus providing a unique and disturbing exploration of human […]

Never Let Me Go

Apoptosis in each Living Thing

Words: 350 Pages: 1 5475

Apoptosis goes on in each living thing. It shapes the beginning life form of every animal and is behind the huge adjustments of caterpillars into butterflies and tadpoles into frogs. Some plant cells moreover deliberately execute themselves, for example, to stop an assaulting parasitic or bacterial tainting spreading. In run of the mill tissues there is a concordance between the period of new cells by methods for cell division and the loss of cells by methods for cell downfall. Old […]

Biotechnology

The Vital Role of Apoptosis in Developmental Biology

Words: 1030 Pages: 3 5784

Apoptosis, a fundamental cellular process, enables cells to undergo programmed and organized death. Introduction This form of programmed cell death, or PCD, is indispensable for maintaining the stability and equilibrium of living organisms. It is a universal process observed across both vertebrates and invertebrates (Miguel-Aliaga et al., 2009). Understanding "normal" development often involves comparing it against what is considered abnormal, given that PCD has a distinguishable relationship with cell division and differentiation. When these processes fall out of balance, developmental […]

Death

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Intracellular Role of Apoptosis in In-Vivo Reactions Occurring in Multi-Cellular Organisms

Words: 1944 Pages: 6 5312

There are two well-known methods of cell execution: Apoptosis and Necrosis. Necrosis is regarded as a violent form of cell death, whereas apoptosis, on the other hand, is a more benign, modulated, and rational mode of killing cells. This process involves making well-informed decisions about selected cells to be terminated for the greater good of the host organisms. The advantages associated with the use of apoptosis as a regulated manner of programmed cell execution are well documented in literature. These […]

Biotechnology

Estrogen, a Steroid Hormone

Words: 246 Pages: 1 5844

Our results extend previous observations describing estrogen's neuroprotective effects. A previous study suggested that the sex hormones estrogen and testosterone worked differently as neuroprotective agents. It provided data for a role of testosterone as a neuroprotective hormone in neurons. When looking at how they regulate protease activity, their results show that testosterone and dihydrotestosterone inhibited calpain activation and the generation of the 17-kDa tau fragment, but did not work on caspase-3 activation and tau truncation at Asp421 as estrogen did. […]

Biotechnology Dementia Medicine

Immunity – Humans are Exposed with Microbes

Words: 1525 Pages: 5 5753

Humans are exposed to microbes that contain a vast array of allergenic substances, threatening normal homeostasis. Therefore, the immune system is important to defend the body from pathogens. It eliminates pathological microbes and toxic or allergenic proteins, but it must avoid responses that cause excessive damage to self-tissues or potentially eliminate beneficial commensal microbes. A general feature of the immune system is that its mechanisms rely on detecting structural features of the pathogen or toxin that mark it as distinct […]

Biotechnology Immune System Medicine

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Role of OX -Notch Signaling in Thymic Treg Development and Homeostasis

Words: 501 Pages: 2 5663

Regulatory T cells (Tregs) plays a crucial role in immune tolerance and diminution of their homeostatic balance causes autoimmunity. Tregs are generated in the thymus (Natural Tregs) and contribute a major portion of the peripheral Treg pool where they suppress self-reactive effector T-cell response. Thymic Treg development occurs in two phases i) In TCR-dependent phase where thymocytes expressing high-affinity T-cell Receptors (TCR) give rise to CD4+CD25-FoxP3low and CD4+CD25+FoxP3- Treg progenitors, ii) In the second TCR-independent phase thymic Treg progenitors gain […]

Immune System

The Dance of Nerves: Somatic Vs. Autonomic Systems

Words: 546 2461

In the intricate tapestry of the human body, nerves play a crucial role, acting as the threads that connect our internal world with the external environment. Like a symphony's conductor coordinating individual instruments to produce harmonious music, our nervous system ensures that different parts of our body work in tandem. Two principal actors in this performance are the somatic and autonomic nervous systems. Although they share the stage, each plays a unique role, making them both distinct and indispensable. The […]

Globular Protein – Caspase-9 Enzyme

Words: 1591 Pages: 5 5401

The globular protein caspase-9 may initially not seem very important or significant, as it sounds like the ninth of many other caspase proteins. However, this protein plays a vital role, not only in the cell’s life cycle but also in the life of humans and other mammals. Caspase-9 is an enzyme whose function ultimately leads to cell degradation and apoptosis. This protein is a member of the peptidase family C14, and is encoded by the CASP9 gene located on the […]

Biotechnology Protein

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Biological Basis of Human Sexual Orientation

Words: 1557 Pages: 5 6007

The desire to study the biological basis of human sexual orientation in the scientific community is relatively recent phenomenon. To this day, sexual orientation acquisition remains one of the most prominent biological mechanisms unknown to science. It has become clear, however, that human sexual arousal, which is usually triggered by external stimuli or endogenous factors, is a multidimensional experience comprising cognitive, emotional, motivational, and physiological components (Hu et al, 2008). With this in mind, from as early as the 1990s, […]

Sexual Orientation

Ethical Challenges in Medical Research: the Story of HeLa Cells

Words: 593 Pages: 2 6503

The book "The Immortal Life of Henrietta Lacks," written by American author Rebecca Skloot, delves into the complex narrative of Henrietta Lacks, a poor tobacco farmer from the Southern United States. In 1951, Henrietta's cervical cancer cells were collected without her knowledge or consent, leading to the creation of the HeLa cell line. This line of cells became the first immortal human cell line and has been instrumental in numerous scientific and medical advancements. However, the ethical implications of using […]

Cancer Health Care Henrietta Lacks Medicine Public Health

About the Cellular Basis of Cancer

Words: 1885 Pages: 6 5919

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

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