Cell Membrane College Essays Samples For Students

Cholesterol is a fat that is needed to build cells, certain hormones and bile acids. Cholesterol synthesis is determined genetically, without it the body cannot fully function, but an excess can have the opposite, negative effect. After the growth of the organism is finished and the cells do not divide so rapidly, cholesterol continues to be synthesized by the liver in the same size. Moreover, a large part of the cholesterol is synthesized in the liver, while smaller part comes with the food.
Fats in general and cholesterol in particular will not dissolve in blood, so to transport them ...

Lesson 5 Answers:

24.) Plants are classified into four major groups: Bryophytes, Pteridophytes, Gymnosperms and lastly the Angiosperms. Bryophytes are the plants that do not have true vascular systems, which consist of the xylem and the phloem. In this group, includes the mosses, liverworts and hornworts. Together, they are considered as land plants that reproduce their own asexually by producing spores. Spores are produced in the ‘sporangium’ (plural sporangia), a bulb-like structure located at the top of the stalk. It can only be seen through the use of high powered microscope. Because they lack vessels that can bring the nutrients from the roots ...

Human Immunodeficiency Virus, HIV is a retrovirus, which is a unique virus family consisting of RNA as the genetic material instead of DNA. This genetic material is surrounded by an envelope of lipoprotein. HIV differs structurally from other members of the family retrovirus. It is roughly spherical and has a diameter of around 120 nm.
Human Immunodeficiency Virus comprises of two copies of non-covalently joined positive single-stranded RNA enveloped by a conical capsid that consist of the p24 viral protein, which is typical of lentiviruses. Lysine tRNA is reverse transcriptase that is magnesium dependent and is involved in the packaging of both ...

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A cell is a form of the miniature factory that encloses a distinct chemical system that is involved in structural maintenance, homeostasis, energy generation and reproduction. Every organism is made of these structural living units. The cell divides and produces more cells and assists in the growth of the organism. There are two types of cells, eukaryotic and prokaryotic. Eukaryotic cells are characterised by a membrane-bound nucleus enclosing the genetic material. The Eukaryotic cells can be divided into three main parts, plasma membrane, cytoplasm, and nucleus (Cooper & ...

Membrane transport refers to the mechanisms by which ions and other small molecules move across the lipid bilayer of the plasma membrane. The lipid bilayer of the plasma membrane allows the passage of certain molecules down their concentration gradient. This passage depends on the charge, size and polarity of the molecule. Non-polar molecules and small polar molecules diffuse easily across the cell membrane by the process of simple diffusion. However, it becomes difficult for charged polar molecules to enter the cell even though the concentration of the ion is more outside the cell when compared to the cytosol. At ...

Why are lipids important?

Lipids are a form of organic molecules, which are categorized together based on their solubility in non-polar solvents. There are four key lipid groups, which include fatty acids, glycerides, nonglyceride lipids and Complex lipids. Lipids are important since they serve different biological functions, which include storage of energy, source of energy, structural components of the cell membrane, adsorption of vitamins, protection, as well as insulation.

Can the body produce essential fatty acids (EFA’s)? If not, how does thebody obtain these needed lipids?

Essential fatty acids (EFAS) include omega-6 also known as linoleic acid and omega-3 also known as alpha-linolenic acid. The body does not produce them, but they are needed and are used to make other fatty ...

Introduction

Biology is broad and therefore embraces various topics in life that concern living organisms. Micro biology for instance deals with the study of very small organisms that are able to reproduce and sustain their generations. This is where the study of prokaryotes comes into the scene. The contrasting organisms to prokaryotes are referred to as eukaryotes. Contrary to prokaryotes, eukaryotic organisms have complex cell structures. Biology tends to full describe the complete nature of these organisms, their feeding habits, how they reproduce and where they thrive best, that is, their habitats.

Prokaryotes are single celled organisms whose cells lack ...

People working in manufacturing and chemical industries are more prone to health hazards as they are exposed to dangerous substances that have adverse health effects on them. Frequent exposure to synthetic substances causes nausea, vomiting, and headaches, which, if not treated at earlier stages turn into life threatening diseases. These substances directly or indirectly exert toxic elements through biological, chemical, physical, genetic or psychological agents on living organisms and other biological systems, and this study is known as toxicology. In an organism these toxic elements are absorbed systematically through the skin, lungs, or gastro-intestinal tracts. The effect of these ...

Abstract

The prodrug design is an efficient and powerful method that can be practised in a wide range of parent drug compounds, administration routes and preparations. Its main goal is to overcome the drawbacks of regular drug compounds by effectively targeting the drug's particular site of action for improved therapy. This assignment seeks mainly to depict the different classifications of prodrugs and the role these play in drug design through the use of several examples. A brief description highlighting the modern aspects of prodrug design is also covered here.

Introduction:

Prodrugs are inactive forms of drug compounds that undergo chemical or ...

Abstract. In recent time, connectomics which is filed aimed to construct wiring diagram of the brain at the level of synapses and their connections has gained an increasing interest and is very promising for neuroscience. Advance in technology allow to acquire huge volumes of data and the challenge for researchers and scientist now is storage, visualization, and processing of the data. Developing GPU technology provides effective solutions for computing on large datasets and its visualization. Moreover, several recent work propose techniques for optimized segmentation, reconstruction, proofreading, and visualization of connectome. However, existing solutions are still not efficient enough and ...

Discuss the therapeutic effects of Ultrasound in the treatment of a tennis elbow soft tissue injury

Introduction
The ultrasound is used as a treatment for soft tissue injuries using sound waves that are beyond the range of normal hearing. An ultrasound consists of inaudible high frequency mechanical vibrations (Gibbs, Cole and Sassano, 2009) which are created upon the conversion of electrical energy into acoustic energy through mechanical deformation of the piezoelectric crystal which lies within the transducer (Rheumatology, 2011). Therapeutic ultrasound uses a frequency between 0.75 and 3 MHz (Knight, Knight and Draper, 2013) for heating deeper and superficial tissues. Low frequency ultrasound at 1 Mhz is absorbed by tissues up to 3 to 5 cm ...

Introduction

Therapeutic ultrasound is categorically as any form of ultrasonic procedure where ultrasound is used in advancing therapeutic benefits. Ultrasound is defined as a systematic oscillating pressure wave that has a higher frequency capacity compared to the human hearing frequency range. Its frequency in most cases supersedes the upper limit of the hearing range of human beings .The execution of the procedures is normally under the use of focused ultrasound (FUS) and unfocused ultrasound. Therapeutic ultrasound is used to reduce pain that emanates from body tissues by providing a viable solution to swelling and edema of the tissues. . Secondly, it is used to ...

Antifungal Medications

In dentistry and oral care medicine, antifungal medications are prescribed less compared to conventional analgesic or antibiotics. However, it is mandatory that a clinician or dentist is familiar with common antifungal indications and medications available in the market. Antifungals are used to treat oral candidiasis. Oral candidiasis is known to cause complex oral health problems. Oral and pharyngeal candidiasis is caused by the primary fungal organism Candida albicans. Oral candidiasis is listed as an acquired immunodeficiency syndrome by the Centers for Disease Control and Prevention. Due to imbalances in the oral flora, patients using oral antibiotics could develop case of ...

Introduction

Obesity and overweight have been classified as global and serious conditions that have an adverse effect on the human health. Obesity and overweight conditions are defined as excessive or abnormal accumulation of fat that may negatively affect health. In adults the obesity and overweight are measured by the body mass index (BMI), which is simple weight-for-height index (WHO, 2014). The BMI is computed by the ratio of the individual's body weight to the square of body height, indicated in Kg/m2 (WHO, 2014). According to W.H.O., (World Health Organisation), a BMI equal or above 25 is considered as overweight while a BMI ...

“Abstract”

Cholesterol plays a pivotal role in the fluidity of plasma membrane in cells. Evidence of cholesterol evolution from lanosterol suggests that cholesterol has little sensitivity to changes in temperature as opposed to lanosterol. Simulations also revealed that there is no ld-lo coexistence and 3-phase lines in lipid/lanosterol systems as opposed to lipid/cholesterol systems. The sterol also favors a strong interaction with lipids having saturated acyl chains (Miao et al.) which is a key factor in understanding and characterizing the lipid bilayer model. Based on surface potential measurements, cholesterol and ergosterol reduce the penetration of water into the lipid monolayer. Results revealed that excess ...

Q1
Insolation can be described as the amount of energy of solar radiation received on a certain surface area and recorded in a given time. It is also known as solar irradiation and expressed as daily irradiation when recorded during a day and hourly irradiation when recorded during an hour. Throughout the year, the seasons undergo changes based on the quantity of sunlight hitting the Earth as it circles around the Sun.
Seasons occur as a result of Earth tilting on its axis, moving in a loop around the Sun every year. Summer occurs when the hemisphere is angled towards the Sun ...

Webliography

Web Address: http://evolution.about.com/od/Overview/a/Types-Of-Cells.htm
Description: According to this we bite, a cell is a basic unit of living organisms. All living organisms have cells. While others are simple unicellular, others are made up of many cells. There are basically two distinct types of cells: prokaryotic and eukaryotic cells. They are fond in different types or organisms. Each type of cell is made up of different organelles. These are specialized in performing different roles. Basically, prokaryotic are the simplest group of cells on earth. Unlike the eukaryotic cells, they are found in single celled organisms such as bacteria and amoeba. These are ...

The G- protein coupled receptors (GPCRs) include a group of receptors that still undergoes intense research. Such research occurs at both academic levels and in the pharmaceutical industry. Several advancements occurred recently in the structure of the G- protein coupled receptors. There appeared new crystal structures as well as ground states and active states. Such advancements in the structure of these proteins helped in the further understanding of the receptors especially in the therapeutic fields. It also possesses an immense impact on the GPCR field (Andrew, 2008, pp.6).
Several fundamental factors help in the understanding of these receptors. Such ...

Pathogenic and Non-pathogenic Organisms

Similarities in both organisms include the fact that both organisms are non-sporulating. Although, not the only metabolite, Salmonella enterica can produce lactate as one of its metabolite while Lactococcus lactis produces lactate. Both organisms are anaerobes, feeding by fermenting substrates (PHAC, 2010). Salmonella enterica ferments glucose while Lactococcus lactis ferments milk.
Salmonella enterica is different from Lactococcus enterica in several ways. From gram staining, Salmonella enterica is a gram-positive organism while Lactococcus lactis is a gram-negative organism. At the level of feeding, Salmonella enterica feeds on a wide range of carbohydrates (PHAC, 2010). It is a heterofermentative organism whereas Lactococcus lactis is a ...

How an Animal Cell Survives

Although the animal cell is similar in many ways to eukaryotic as well as some few eukaryotic cells, there are strikingly large differences between them, especially the requirements for survival in various environments (Baitsell, 2008). The animal cell is one of the members of eukaryotic cell category, whose structure is quite complicated by the organelles present as well as the diverse functions they play towards the survival of the cell and the organism in general (Solomon, Berg, & Martin, 2004). The cell structure is defined by a plasma membrane that bounds a number of organelles, all of which function towards the ...