WHICH ORGANELLE IS THE MOST CRUCIAL TO THE FUNCTION OF ORGANISMS?
ANU BHANDARY
The nucleus is a dark spot in the cell. The nucleus is a double membraned cell found in all eukaryotic organisms. It is the largest organelle in the cell, the location of the nucleus often varies but it is usually thought to be in the middle. On average, the nucleus is 5 µm in width. It contains all the DNA on inside of the cell which is responsible for all hereditary information. The nucleus, as mentioned above is a double-membraned organelle. It has an inner and outer membrane which are away from each other by about 20 to 40 µm (All Answers Ltd., 2015). The outer membrane of the nucleus is attached to the endoplasmic reticulum. The outer membrane helps to keep
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Nuclear pores allow for molecules to be able to transport between the nucleus and the rest of the cell (Wiley, 2014). Inside the nucleus is the nucleoplasm. Nucleoplasm is a lot like the cytoplasm in cells in the sense that it is made of predominately water, proteins, RNA (ribonucleic acid) and DNA (deoxyribonucleic acid). However, the difference between the two being that nucleoplasm contains materials that help prepare DNA and RNA (InnovateUs, Inc., 2013). The cell nucleus also contains chromatin, which is a factor of creating chromosomes. The very middle of the cell is the nucleolus which is the structure that the nucleoplasm is surrounding. The nucleolus is the structure that is responsible for assembling ribosomes. In between the chromatin and the inner membrane is the …show more content…
The nuclear lamina as stated before is structure that exists in between the chromatin and the inner membrane. It is responsible for keeping the structure of the nuclear envelope as well maintaining the nuclear pore complexes, it also assists with DNA synthesis (NCBI, 2015). The nuclear lamina is also quite important to the endoplasmic reticulum (ER) due to the fact the ER is found directly adjacent to the nucleus. The ER can come in two forms: Rough ER and Smooth ER. The rough ER and smooth ER have different functions. The rough ER has ribosomes attached to its outer surface, hence why it is called rough (Britannica, 2016). The rough ER is generally adjacent to the cell nucleus and specialises in the production of proteins. Then those proteins go to their intended places, for example, some proteins may go to the nucleus whilst others go to mitochondria (Swafford, 2016). The smooth ER, on the other hand, specialises in the production of lipids or fat. Without the nucleus’ nuclear lamina, the structural framework for not only the nucleus is compromised but also the structure of the ER. Without the ER it would be impossible to synthesise lipids and
There are many different cells that do many different things. But all of these cells fall into two categories: prokaryotic and eukaryotic cells. Eukaryotic cells contain a nucleus and are larger in size than prokaryotic cells. Prokaryotic cells do not contain a nucleus, are smaller and simpler than eukaryotic cells. Two of their similarities are they both have DNA as their genetic material and are covered by a cell membrane.
parts, and each part has its own job. The nucleus of a cell is very similar
Since DNA has the instructions for making the proteins, but it has to be highly protected, it doesn’t leave the nucleus where it is mostly found (Hall, 6). DNA’s function is to be a long-term storage and transmission of the genetic information (DNA vs RNA, 2014). Copies of certain instructions needed for proteins can be made in the form of RNA. It’s not an exact copy of what is found in DNA, but RNA can travel out of the nucleus with the instructions. RNA make...
The most important and largest cellular organelle is the nucleus, which houses most of the eukaryotic cell’s DNA and is surrounded by a double membrane. The nucleus contains most of the cells genetic material. The nucleus is the control center of the cell.
Eukaryotic cells have their chromosomes contained in a nucleus. Unicellular orgasisms such as amoebas and yeast, or multi-cellular organisms such as plants and animals consist of eukaryotic cells. Human being consist of approximately 1 billion cells per gram tissue. DNA located in 23 pairs of chromosomes is contained in each cell nucleus. Schleiden in 1838 and Schwann in 1839 made very important discoveries that we consist of cells, and Remark discovered that cells prolifarate through division in 1850. Three decades ago, the molecular mechanisms that regulate the cell cycle and thus cell division was able to be identified. It has been known that these vital mechanisms are conserved through evolution and function in the same way in eukaryotic organisms.
The nucleus is a organelle that controls all life activities, especially reproduction. In a basketball stadium, the head coach is like the nucleus. The head coach controls everything that happens especially what his team does. This is how the
The nucleus is one of the most important organelles in a eukaryotic cell. The shape of the nucleus is generally spherical, it should be oval, disc formed reckoning on the sort of cell. The nucleus was found by Robert Brown in 1831 while he was looking at orchids under a microscope. He discovered a blurred area in the cells of the flowers and called it the areola or the nucleus.
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.
Nuclear Medicine is the use of radioisotopes for diagnosis, treatment, and research. Radioactive chemical tracers emit gamma rays which provides diagnostic information about a person's anatomy and the functioning of specific organs. Radioisotopes are also utilizes in treatments of diseases such as cancer. It is estimated that approximately one in two people in Western countries are likely to experience the benefits of nuclear medicine in their lifetime.
Cells are able to grow and reproduce. Cells reproduce by splitting and passing on their genes (hereditary information) to Daughter cells. The nucleus always divides before the rest of the cell divides. Therefore each daughter cell contains their own nucleus. The nucleus controls the cells activities through the genetic material DNA. The cells in a body are all the same except the gametes they were all made from one cell, the Zygote. This is the cell that was formed when two gametes from your parents fused.
The membrane surrounding the nucleus in eukaryotic cells, separate the nucleus from the cytoplasm. Most of the cells we used in the experiments held, were multicellular or consisting of more than one cell. A variety of cells were used in completing the experiments. We used union cells, cheek cells, potato cells, and Elodeo cells. We also used Planaria which is a unicellular organism.
Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. But it also contains highly organized physical structures which are called intracellular organelles. These organelles are important for cellular function. For instance Mitochondria is the one of most important organelle of the cell. Without Mitochondria more than 95% of the cell’s energy, which release from nutrients would cease immediately [Guyton et al. 2007].
The nucleus is often the largest organelle found in a Eukaryotic cell with a size of 10-20 un. It is surrounded by two membrane layers which can be identified on the diagram below. Within the nucleus structure are small pores with a size of 100un in diameter. These pores together make up around one third of the nuclear membrane surface area.
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.
Within the human anatomy, an intricate and complex network of specialised nerve fibres and neurons works in collaboration with the central nervous system and peripheral system, designed to carry out the various actions humans perform every day. The nervous system is also known as the master control unit of the human body, as it operates other major functions such as the circulatory and respiratory systems (Jakab, 2006). It is composed of the central nervous system (CNS) and the peripheral nervous system (PNS). The neurons established within the various sections of the nervous system, is structured with three main parts: a dendrite which is a cluster of branches that operates by receiving information from the receptor and neurons and transferring nerve impulses to the cell body; furthermore, a cell body is composed of a nucleus, that works to provide energy and nutrients for the neuron; lastly is an axon, electrically conducted by the myelin sheath, the axon is a pathway nerve impulses pass through from the cell body. In addition, this is the process in which nerve impulses travel by to be able to access the rest of the system (Core Science, 2010). The correct function of the nervous system is vital to the daily survival of an individual, as it obtains a significant role in the control and co-ordination of the human body. Furthermore, if a situation occurs where the nervous system dysfunctions or develops a disease (such as multiple sclerosis), it would in that case threaten the current status of one’s health and cause havoc in the system.