Important Parts Of A Cell

* Cells allow things to go in and out of the organism (allows diffusion to happen so good things go in and bad things go out)

The body has two faces, the cis face which fuses with incoming transport vesicles, and the trans face which excretes the secretory vesicles. The cis face fuses with vesicles coming from the ER effectively from many directions due to its convex shape, whereas the concave trans face can direct the secretory vesicles to their destination. When fusing with the cis face, the transport vesicles release their proteins to be absorbed for modification. Each cisternal layer of the Golgi body holds different enzymes which each modify the passing proteins in separate ways. Between the layers the proteins are moved through the gaps by small vesicles. When a protein has been modified correctly, it leaves the Golgi body via secretory vesicles which then carry the modified proteins to the cell membrane or another organelle. The proteins that are transported to the cell membrane are either excreted from the cell, or absorbed into the membrane to aid with its function. Some of the secretory vesicles which hold hydrolytic enzymes stay within the cytoplasm and function as lysosomes.

In this report i will be writing brief description on the functions of the main cell components of the body cell.

The cell membrane consists of eight distinctive parts that each have their own unique structure and function. The phospholipid bilayer is an integral part of the cell membrane because it is the external layer of the cell membrane and composes the barriers that isolate the internal cell components and organelles from the extracellular environment. It is composed of a series of phospholipids that have a hydrophobic region and a hydrophilic region. These regions are composed of the hydrophilic heads and the hydrophobic tails of the phospholipids, this organization of the polar heads and nonpolar tails allows the heads of the cell to form hydrogen bonds with water molecules while the tails are able to avoid water. The phospholipid bilayer also has many important functions within the cell, it gives the cell shape, provides protection, and it is selectively permeable which allows it to only let very specific molecules pass through its surface. The phospholipid bilayer is an important structure because it prevents harmful and unwanted molecules from entering the cell and isolates organelles which helps to maintain the internal environmental homeostasis of the cell.

All cells have a cell membrane. The structure of membranes is formed from a double layer of phospholipids with proteins floating in it. The proteins are embedded on the surface and inside or bridge the double layers of phospholipids. This structure is called a mosaic model. The main function of cell membranes is to provide protection and support for the cell and they also control what enter and exit the cell to maintain internal balance, called homeostasis. There are two types of a membrane protein: integral proteins and peripheral proteins. The integral membrane proteins are

To maintain homeostasis, cells must move materials in and out of their cell membranes. The cell membranes are semi-permeable, which helps to regulate what enters and leaves the cell. Phospholipid fatty acids are hydrophobic, meaning they dislike water and help to limit the movement of water across the membrane. The membrane is actually a phospholipid bilayer containing embedded proteins.

There are two types of proteins located within the cell membrane: integral proteins and peripheral proteins. Integral proteins are found within the

The cell membrane is the frame holding the cell together. It also allows nutrients to enter and waste to vacate. In our theatre

A very large percentage of our body is composed of fluids. The most basic and widely known fluid, water, is essential daily to maintain life. Other fluids in our body also broadly include serum, cerebrospinal fluid, albumin, and urine to name just a few. There is a very critical balance of these fluids that we must maintain for homeostasis; otherwise we could have an excess or deficit. There are two main fluid compartments within your body, being the intracellular and extracellular compartments. (McLaffert, Johnston, Hendry, & Farley, 2014) One-third of your body consists of the extracellular space which is found on the outside of cells. The compartment of extracellular can be further broken down into intravascular, or plasma and interstitial.

I. Introduction: • The cell is the smallest basic element of all life, but it has incredible biological organization functions such as metabolism, growth, movement, reproduction, and heredity. A human cell has three major parts: the plasma membrane, the cytoplasm, and the nucleus. The plasma membrane is a partially permeable membrane which controls substances entering or leaving the cell. It also acts like a barrier blocking harmful things from entering the cell and lets nutrients in. There are two types of movement across the plasma membrane: passively or actively.

Proteins serve a myriad of functions whether within or outside of the cells. These functions include structural roles (cytoskeleton), transport of

In the constantly fluctuating environment of the body it is essential for living cells in to be able to maintain a homeostatic balance, in order for them to function effectively (Owen, 2015). Cell membranes enable this by controlling which

Proteins are a major molecular constituent of cells they are vital for all living organisms and make up about 15% of body mass. They are versatile macromolecules as they serve as a catalyst for biochemical reactions (Hayward, 1999).

The membrane of the red blood cell plays many roles that aid in regulating their surface deformability, flexibility, adhesion to other cells and immune recognition. These functions are highly dependent on its composition, which defines its properties. The red blood cell membrane is composed of 3 layers: the glycocalyx on the exterior, which is rich in carbohydrates; the lipid bilayer which contains many transmembrane proteins, besides its lipidic main constituents; and the membrane skeleton, a structural network of proteins located on the inner surface of the lipid bilayer. In human erythrocytes, like in most mammal erythrocytes, half of the membrane mass is represented by proteins and the other half are lipids, namely phospholipids and cholesterol.[29]

The plasma membrane maintains dynamic homeostasis by separating the internal metabolic events of the cell from its external environment and controlling the movement of materials into and out of the cell. The membrane is a double phospholipid membrane, also referred to as a phospholipid bilayer, and has polar hydrophilic ("water loving") phosphate heads around the outside and non polar hydrophobic ("water fearing") fatty acid tails on the inside of the membrane. Slight variations in these structure of the fatty acids in the membrane alter the fluidity of the membrane. Phospholipids with saturated fatty acid pack more tightly, because of the nature of their single carbon bonds. This leads to a more rigid membrane. Unsaturated fatty acids, which have double carbon bonds, limit packing and result in a more flexible membrane. Cholesterol molecules distributed throughout the phospholipid bilayer provide some stability to the plasma membranes of animal cells. At higher temperatures the cholesterol molecules allow the membrane to be firmer, at lower temperatures they allow for flexibility.