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Plasma membrane essays
Plasma membrane essays
Difference of prokaryotic and eukaryotic
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Cells The average person’s body contains 37.2 trillion cells (Jones, et al 446-457). Each cell fulfills a specific role within the body to help maintain the overall life and function of an individual. There is a conjoint configuration that can be found throughout most animal cells. Each part of a cell with its specific role is known as an organelle (Mader, Windelspecht 47). The plasma membrane, cytoplasm, nucleus, cytoskeleton, and other organelles are all essential parts of an animal cell (Mader, Windelspecht 47-58). One organelle in animal cells is the plasma membrane (Mader, Windelspecht 47-48). It is composed of a phospholipid bilayer with rooted proteins. The plasma membrane serves as the barrier between the inside and outside of a cell. It also controls what enters and exits the cell. It serves many purposes that are vital for the cell’s survival and task(s) inside the body (Wolfe 6-12). In the plasma membrane, the cytoplasm exists with many organelles carrying out specific tasks (Softschools.com). Cytoplasm is a liquid that mostly contains salt and water. The shape of a cell is kept due to cytoplasm. Organelles stay where they are at due to cytoplasm. Without it, the cell would depress and materials would no longer be easily passed between organelles. Another part of the cytoplasm called …show more content…
Substrates that are broken down in the cytoplasm are brought to mitochondria to be made into a chemical known as adenosine triphosphate (ATP) to be used at a later time. Mitochondria have two membranes. The inner fluid of them called the matrix is used to produce energy for ATP creation by using ribosomes and enzymes to break up carbohydrate products. The second (inner) membrane of mitochondria invaginate to develop cristae. Cristae gives up far more surface area in order to house the necessary products for ATP creation. Mitochondria also help in cellular differentiation and cell death (Mader, Windelspecht
Cytoplasm is a jelly-like fluid inside the cell in which the organelles are suspended. All life activities except reproduction happen here. In a basketball stadium the fans are like cytoplasm in a plant cell. The fans are like cytoplasm because they are all over the stadium like cytoplasm is all over the plant cell. This is how cytoplasm is like the fans because they both are all around the
The Lives of a Cell: Notes of a Biology Watcher by Lewis Thomas consists of short, insightful essays that offer the reader a different perspective on the world and on ourselves.
to construct and or maintain the cell membrane. In a microscopic view of the cell membrane we can
Mitochondria are sub-cellular organelles which are found suspended in the cytoplasm of majority of eukaryotic cells. One of their functions is to produce energy in a form (ATP) that is useful for all cells to maintain the intra and extra cellular functioning. Mitochondrion has a matrix that is surrounded by two membranes called the inner membrane and the outer membrane. These two membranes are separated by an inter membrane space. The outer membrane has proteins embedded in them (most of which are porins- proteins that allow free transfer of molecules such as nutrients, ions, proteins etc.). While the outer membrane is smooth, the inner membrane is highly convoluted into structures called cristae to increase the surface area of the membrane. [1]
This happens because the mitochondria now has more surface area connecting it to its surroundings. The processes that the mitochondria make are to break down the high energy organic molecules into smaller more useful packages. The endoplasmic reticulum is a network of tubes and channels that transport and with the help of ribosomes produce proteins. The rough endoplasmic reticulum contains ribosomes which are not present in the smooth endoplasmic reticulum.
Gardiner, L. (2004). Organelles of Eukaryotic Cells. In Windows to The Universe. Retrieved December 8, 2013, from http://www.windows2universe.org/earth/Life/cell_organelles.html.
These cells can be round or irregular shapes maintained by the plasma membrane. Animal cells have certain organelles that are not found in plant cells such as centrioles, lysosomes, cilia, and flagella. All of these organelles have specific jobs to help the cell function. For example, the centrioles organize the assembly of microtubules during cell division, and the cilia aids cellular locomotion. Animal cells store energy in the structure of complex carbohydrates, and can only produce ten of the twenty amino acids needed to produce
The mitochondria produces food for the cell by converting energy the cell needs. The mitochondria and the nucleus are two organelles within a cell that have many of the same similarities. Both organelles are made of two membranes. These layers isolate within the organelle all things considered, yet have protein channels that permit things to go in and out. Both contain DNA material that conveys qualities that encode for proteins. Both have qualities that make ribosomes, the machines that read the guidelines in RNA to make
The Wooly Mammoth is built up of eukaryotic cells. These eukaryotic cells have nucleuses and many other organelles. The cells are built up of many organelles. Though the cells have many organelles that are all required to keep everything running, some have very distinctive jobs. One organelle is the cell membrane, the cell membrane supports and protects the contents of the cell which makes it a key organelle for the cells survival. Another organelle is the nucleus,
A cell is the simplest unit of matter that the human body is composed off. Cells have great importance in all living things, in particular humans as they provide structure for the body to be able to extract nutrients needed to survive from food, converting the nutrients into energy and using the energy to carry out certain functions in the body. Characteristics of normal cells include several important mechanisms. A cells role is to be able to reproduce them selves exactly, thus being able to go through the process of mitosis. Mitosis is a process of cell divisions that results in two daughter cells that replicates and has the same number of chromosomes as the parent cells. Other characteristics include, being able to stop reproducing cells at the correct time and also being able to self-destruct once the cell has denatured.
The mitochondria is an organelle which is generally an oval shape and is found inside the cytoplasm and is again apart of the eukaryotic cells. The main function of the mitochondria is to complete cellular respiration; in simple terms it acts like a digestive system to break down essential nutrients and to convert it into energy. This energy is usually found to in ATP which is a rich molecule taken from the energy stored in food. Furthermore, mitochondria stores calcium for signalling activities; such as heat, growth and death. They have two unique membranes and mitochondria isn’t found in human cells like the red blood cells yet liver and muscle cells are filled entirely with mitochondria.
Energy production- The most important function of mitochondria is energy production in the form of ATP. The raw materials are food materials and tissues which are broken down in catabolism. These molecules transferred to mitochondria for further processes. In inner membrane they have electrical charges then they help in producton of ATP (Phosphorylaton) by combine with oxygen (Oxidaton) through five electron transport chain complexes. So this overall
The Animal Cell is a little bit different than the Plant Cell for only a couple of reasons. One is how the Plant Cell has a cell wall and the Animal Cell doesn’t. The cell wall protects and gives structure to the cell. Then there is the Nucleus, which serves as a control center for the cell. Inside the Nucleus there are one or more Nucleoli. They are dense, granular bodies that disappear at the beginning of cell division and reappear at the end. Then you have the Cytoplasm. This is the watery material lying within the cell between the cell membrane and the nucleus. The Cytoplasm also contains organelles, which have specific functions in the cell metabolism. Then there are the Golgi Bodies, which serve as processing, packaging, and storage for the cell. These organelles package and ship things out. Another parts of the cell, a very important one in fact, are the Lysosomes. These organelles are used to break things down and contain enzymes.
In this cell though, the nucleus was not present. The plant cells and animal cells were very different. In the plant cells there was motion of cell parts but in the animal cells there was no motion. Also, the nucleus and chloroplast of the plant cell were towards the outside of the cell because the chloroplast can receive sunlight better on the outside of the cell than on the inside. In the animal cells though, the nucleus and cell organelles, were towards the middle of the cell.
Their main purpose is to survive and their functions allow them to do so. All cells have common features whether they are eukaryotic or prokaryotic cells. The common features include a plasma membrane, cytoplasm, ribosomes, and DNA. A plasma membrane which is also known as a cellular membrane, surrounds all cells and its primary function is to protect them. Plasma membrane is made up of two layers of phospholipids which are a class of lipids and has many proteins embedded in it. The proteins have a function of providing support and shape to a cell. There are three different proteins in cell membranes (see appendix 1). The plasma membrane also regulates the entry and exit of the cell, as many molecules cross the cell membrane by osmosis and