Biology Essays

Negative feedback in living organisms Negative feedback is a principle which is used by the body in order to return systems to its normal level; it does this by turning the corrective measures off. Homeostasis uses the principle of negative feedback in order to maintain a constant internal environment. There are a number of different […]

1. How does Anna Vasilevna change by the end of the story from what she is like at the beginning? Explain the part Savushkin plays in these changes and how the language of the story helps us to understand them. In ‘The Winter Oak’, Anna Vasilevna changes in many ways and Savushkin is the key […]

The chapter delves into a fascinating glimpse of upcoming medical possibilities. Although some concepts may initially resemble ideas from a science fiction novel, they are genuinely based on emerging scientific progress. The chapter examines the idea of humans attaining more control over existence, essentially “playing God”. Technological advancements allow healthcare experts to accomplish astonishing feats […]

Atkinson and Shiffrin’s (1978) proposed the idea of the Multi Store Model. The Multi Store Model (MSM) is a structural model. It argues that there are three store stores, the sensory, short term and long term memory which are all unitary stores, they work alone. Each store has a different capacity, duration and way of […]

A pond is a body of freshwater smaller than a lake. Ponds are naturally formed by a depression in the ground filling and retaining water. Streams or spring water is usually fed into these bodies. They can also be man-made ponds which can be created by damming a stream, digging a hole. Ponds are usually […]

Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called “blasts”. Leukemia is a broad term covering a spectrum of diseases. In turn, it is part of the even broader group of diseases affecting the blood, bone marrow, and lymphoid system, which […]

This article examines the partnership between the Central Nervous System (CNS) and Peripheral Nervous System (PNS), where the PNS transmits impulses to and from the CNS. The brain is composed of three primary components: the Cerebrum, which handles memory, thinking, and emotions; the Cerebellum, responsible for coordinating balance; and the brain stem, governing functions like […]

Cells are the basic unit of life that every living thing starts from and is made up of including humans. Within our bodies, cells form tissues. Smooth muscle tissue in the illustration is made of smooth muscle cells attached to one another. When the muscle cells contract the tissue shortens. Organs are formed from two […]

What does biodiversity mean? It is a word used to describe the variety of all life in an ecosystem in addition to the specific habitats and communities in which they live (Convention on Biological Diversity). For years, people have been going back and forth on whether the environment is overprotected or underprotected. I believe that […]

1. Can you identify a portal system in the renal circulation? The glomerulus is the site of the portal circulation in the kidneys. The afferent arteriole enters the glomerulus and ultrafiltration of blood occurs here while the rest of the blood is carried in the efferent arteriole to the venules. Thus blood is carried into […]

The moral status of the embryo is a controversial and complex issue. The main viewpoints are outlined below. 1. The embryo has full moral status from fertilization onwards Either the embryo is viewed as a person whilst it is still an embryo, or it is seen as a potential person. The criteria for ‘personhood’ are […]

1) The relationship between the rate of diffusion, volume and surface area is that the surface area of a subject somewhat correlates with the volume of the object. When the surface area and volume are set up as a ratio, this gives a good idea as to how fast the rate of diffusion will be. […]

The idea of a “designer baby” involves parents using genetic technology to make changes and choose desired or aesthetic alterations in embryos. This raises concerns about how potential parents will decide on having children. Will they choose to interfere in the natural development of an embryo? Is it ethical to modify an unhealthy embryo? Could […]

When determining and discussing the question “how adoption and twin studies have influenced the nature versus nurture debate” it is important to identify the key terms. The nature versus nurture debate is an ongoing debate focusing on how much our environment (nurture) and our genes (nature) affect us as human beings. Twin studies (studies involving […]

On a trip to San Diego Zoo on March 23, I learned about the variety of primate species. Three species that will be analyzed here are the Wolf’s Guenons, the Mandrills, and the Siamangs. Wolf’s Guenons, Old World monkeys, are found at south of Africa’s Congo River. Their habitat is forests, woodlands, near rivers and […]

The woodlouse is a type of crustacean that belongs to the suborder Oniscidea in the order Isopoda. There are over 3,000 known species of woodlice. They have a lengthy exoskeleton and fourteen jointed limbs. As they grow, woodlice need to shed their shell-like exoskeleton. This shedding process occurs in two stages – first the back […]

I research on animals. I study the intimate chemical and electrical processes that are the brain’s mechanisms for storing information, for learning and memory. To discover those mechanisms, I analyse the cellular changes that occur when young chicks learn and remember simple tasks. An anti-vivisectionist once asked me whether my research didn’t make me feel […]

The fetal pig dissection was helpful for one to understand the body and all of the body’s functions. The procedures helped the students precisely do the dissection correctly. The questions that were assigned helped the students have a deeper understanding of the pig’s body. This dissection also helped the students become familiar with some of […]

Species on Earth interact in many different ways (Abrams, 2000). These interactions have evolved over millions of years to become an incredibly complex web of inter-species relationships and understanding these relationships enables science to model future species interactions (Abrams, 2000). From symbiosis to parasitism, Earth seems to have every type of relationship imaginable (Dietl and […]

I have been assigned to write about the fundamental nutritional terms and concepts related to Marian’s case study. To begin, Marian will provide a brief explanation of the key terms used in the field of nutritional health. These terms include: The text below is unified but retains the and their contents: Food: Food is a […]

In 1951 at Johns Hopkins Hospital, a black woman was diagnosed with cervical cancer. She underwent treatment there as it was one of the limited number of hospitals that accepted black patients. Without her knowledge or consent, cells were extracted from her cervix during an examination. These cells, referred to as HeLa cells after her […]

There is no doubt that Veganism is a complex and highly controversial issue. Veganism is primarily known as a type of diet; one that excludes all animal products and byproducts as dairy, eggs, and honey. Basically, there are two groups of vegans. One of them lives the vegan lifestyle for ethical reasons the other for […]