Cells and Stem Cells
1. The Diagram of a typical Animal cell (not drawn)
2. In your own words, describe and explain what each part of the cell does
Vacuole: Vacuoles are used as storage inside the cell, they are found in both the animal cell and the plant cell, but are larger in plant cells because they have to store lots of water for the actual plant to survive and thrive. Vacuoles store food, water and nutrients to help keep the cell alive. The vacuole can also store the waste that the cell produces so it doesn’t contaminate the rest of the cell. This waste usually contains extra water and maybe even poisons that can harm or even kill the cell. Eventually, the waste would be sent out from the cell. Vacuoles are usually made from
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This process then creates energy for the cell. If a certain type of cell needs more energy to survive, there would be a more Mitochondria to help produce more energy that the cell needs. The main function of this energy is to help with the cell cope with the production of adenosine triphosphate. Adenosine triphosphate is produced inside the Mitochondria, using the energy that is in the stored food which is in the vacuole. This helps the cell develop and it keeps itself …show more content…
The Nucleus’s position of the cell is not always in the centre, it can be near the cells membrane for instance.
Nucleolus:
3. Draw two different specialised animal cells. Explain their function and how they have adapted to that particular function? Draw a table to compare and contrast the structure and function of the two cells.
The Sperm Cell and the Nerve Cell
Similarities . The Sperm Cell contains a Nucleus and so does the Nerve Cell. The Nucleus helps control the movement and the cells reproduction.
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Differences . Nerve Cells are covered by lots of many small membranes, these membranes small axons. Axons are responsible for carrying information to other Nerve cells, whereas the Sperm Cell contains no axons, so it can’t communicate with other sperms.
. The Sperm Cell has a flagellum, which is a tail. This flagellum helps the Sperm propel itself and to make it swim as fast as it can until it can get to the females egg. On the other hand, the Nerve Cell doesn’t have a tail, so therefor it cannot move. The Nerve Cell can only send impulses to other Nerve Cells.
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The Mitochondria is one of the organelles. This is the cells source of energy, which means the energy from respiration is converted into glucose.
Plant cells are different than animal cells due to the fact that they need to go through photosynthesis. They are also similarly because they both have a golgi bodies/apparatus. Another difference is that plants have a cell wall and animals don’t. Another way their different is that they don’t have all the same cells. For instance animal cells have nucleolus,chromatin,vacuole, and lysosomes. While plant cells only have chloroplasts, cell wall, and lytic vacuole. Another reason they are both similar is that they both almost have all the same cells like the rough and smooth er. The cells that they both have are golgi bodies/apparatus, cytoplasm, cell membrane, nucleus, mitochondria, ribosomes, endoplasmic reticulum, lysosomes,
The mitochondria is like the cafeteria. The mitochondria generates cellular energy (ATP). Mitochondria are also involved in other cell processes such as cell division and growth, as well as cell death.Mitochondria are bounded by a double membrane. The cafeteria
Mitochondria: The mitochondria functions as the 'powerhouse' of the cell. It provides energy to the cell so that it can produce the energy which the cell needs in order for it to carry out it's function.
The nucleus is the most prominent feature in the cell. It is usually spherical and generally around 10 -20 um in diameter.
The Nucleus has a sphere-shaped body that encloses a variety of organelles, including the nucleolus, and is home to the deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) of a cell inside the chromosomes. It is typically seen as the largest part of the animal cell. The nucleus controls many of the functions and activities inside an animal cell, and is known as the “control centre” of a cell. On the diagram, the nucleolus can be located as the black dot in the middle of the Nucleus, and is the main site for ribosome formation.
Organelles are the internal structures of the cell that are important for the cell to survive. Each organelle has a specific function for the cell. The types of organelles in the cell can be different from each other depending on the type of cell. Plant cells and animal cells both have a cytoskeleton, endoplasmic reticulum (smooth and rough), golgi apparatus, mitochondrion, nucleus, plasma membrane, and ribosomes. Animal and plant cells also have vacuoles, but they are rarely found in animal cells. Vacuoles in animal cells are very small compared to the vacuoles in plant cells. Lysosomes are also rarely found in plant cells but mostly found in animal cells.
All cells have a cellular membrane, which is a thin layer of fat that encloses the cell. A cell membrane is a protective barrier that indicates what goes in and out of it. In a hospital this would be the security guards and doors because the doors are basic entries into a building and security guards determines who and what should be allowed in. All cells also have a cytoplasm which is the jelly-like fluid that fills up a cell and allows the organelles to move
The human egg cell has all the things any other usual cell would have. The function of the ovum is to carry the set of chromosomes contributed by the female and create the right environment to enable fertilization by the sperm. Ova also provide nutrients for the growing embryo until it sinks into the uterus and the placenta takes over (Study.com).The cell contains 3 main parts; the head, midpiece and tail. The head of the sperm cell contains the nucleus of the cell and the acrosome enzymes. The nucleus is the 'brain' of the cell and contains 23 chromosomes; 22 normal chromosomes and 1 sex chromosome .A female egg cell contains many organelles such lysosomes, mitochondria, haploid nucleus and smooth and rough endoplasmic reticulum . Overall the egg cell has many organisms that make the cell function right and without them things would not be the same
The golgi apparatus is an organelle that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell. The job of the golgi apparatus is to package the proteins so that they are able to travel out of the cell. The vacuole can be found inside the cell. The vacuole is a saclike, membrane-enclosed structure. The vacuole is in charge of storing materials like water, salts, proteins, and carbohydrates. Another organelle found in the cell is a lysosomes. A lysosome is a small organelle filled with enzymes. This organelle breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell. The cell wall is an important organelle in the plant cell. The cell wall is a strong supporting layer around the membrane. The cell wall is responsible for protecting the cell and providing structure to the cell. Lastly, the vesicles are very important to the cell. Vesicles are membrane enclosed storage organelles that are smaller than vacuoles. The job of vesicles is to store and move materials between organelles and to and from the cell
In the beginning of the article, the writer describes the main function of lysosomes and how lysosomes relate to other organelles in other types of cells. In the writer’s words, “Lysosomes are found in animal cells...In plant and fungal cells, a similar type of function is carried out inside vacuoles”(p. 1).
During fertilization, Sperm penetrate into MII-arrest oocyte and trigger oocyte by increasing in intracellular calcium (Miyazaki et al., 1993). High level of intracellular calcium that is essential for cellular signaling lead to oocyte activation, meiosis resumption, cortical reaction to block polyspermy and then zygote development. Following egg activation and resumption of the cell cycle, sperm-egg fusion leads to sperm head decondensation and anaphase II plate formation, the second polar body extrusion and recruitment and translation of maternal mRNAs (Cascio and Wassarman,
Micronuclei are very carefully copied and moved so that each daughter cell gets one, but once division is complete usually new macronuclei will be produced from each cell's micronucleus, so careful shepherding of the macronucleus is not necessary. Sexual reproduction in ciliates is called conjugation. During conjugation, there is a transfer of genetic material via cell-to-cell contact by a bridge-like connection. The last system, which can be replaced by an organelle in the protozoa, is the nervous system. The function of the nervous system is to regulate and correlate body activities through conduction within and between individual cells or neurons, which eventually cause a response in some other system. In the paramecium, the macro and micronuclei are responsible for the functions of the nervous system. The nucleus is the control center of the cell and it contains the genetic info needed to copy to make new cells. Just as the brain, nerves and spinal cord would work; the micronucleus and macronucleus control the activities of the cell.
It can also be attached to the nuclear envelope which is found surrounding the nucleus.
Sex Cells: Also known as Gametes, are the sperm cells in males and the eggs cells in females. These cells fuse in a process called fertilization , and the resulting cell (zygote) contains a mix of inherited genes from the father and mother.