Kyle Anders 5/14/18 (Carra B, Ashleigh B, Alajha J) How Stem Cells are used in a Planarian Introduction: In order to understand and comprehend the experiment being performed there were some words that are needed to be understood about planarians. Nuymber one is obviously what is a plnarian. Planarian: a free-living flatworm that has a three-branched intestine and a tubular pharynx, typically located halfway down the body. Stem Cell: an undifferentiated cell of a multicellular organism
Spermatogenesis Spermatogenesis is the formation of the male sex cell, sperm. This process begins with the differentiation of germ cells to form stem cells. A first mitotic division creates spermatogonia (diploid) and a second creates spermatocytes (diploid). Each spermatocyte then goes through meiosis to firm four haploid spermatids. In the seminiferous tubules the cells move towards the centre of the tubules as they undergo shape changes. The cells go through a spermatocyte and a spermatid stage
Most are seen in fresh water environments, while others are found in large mosses, on land, and even in salt water. They are soft bodied, leaf-shaped, and ciliated animals that have two eyes, and a pointed tail. They have a mouth on the ventral side of their body often located half way to their tail. They typically grow between three and fifteen millimeters in length, and are a gray, brown, or black color. Planarians move by swimming, and some are relatively fast. Majority of planarians are carnivorous
that all portray the dehumanization of the tail members caused by the structure of such capitalist systems. One of the first scenes in Snowpiercer illustrates a seemingly routine check on the tail section with a head count. Within this scene, all the tail sectioners stand neatly in rows, one behind the other, and fall back with every click of the authoritarian guard's counter (Snowpiercer). Specifically for this occasion, Joon-ho elects to show the head count with a long shot, or a view of a
surfactants represent a new class of surfactants that is finding its way into surfactant-based formulations. Dimeric surfactants represent a new class of surfactants. They are made up of two amphiphilic moieties connected at the level of the head groups or very close to the head groups by a spacer group. 4-octylphenol polyethoxylate (Triton X (n = 9-10) Hexadecyltrimethylammonium bromide (C Hydrophobic group Figure 2.1: Hydrophilic and hydrophobic groups of some surfactant molecules. 10 X-100, C8H17-C6H4-(OC2H4)nOH
with a white spot on his chest, laid between my legs with his narrow head on my left thigh. I stayed there for a few minutes waiting for the haze that waking up brings. As that alleviates, I reached over to my bed side table to get my glasses, Keltie reacted to this by hitting my ankles with his tail. He stopped wagging his tail and sat up, staring at me with his large, brown eyes. After a couple of seconds, he began to wag his tail again. There was not a long period of that before he laid down again
(Docked- the removal of portions of an animal's tail) The reason they docked their tail was because it would hit the cart or knock meat off the cart when the dog´s tail would wag. With the descent of the Cattle dogs, Rottweilers main occupation besides being a pet was herding cattle. Although in the 19th century cattle herding was forbidden by law, and so with
are a variety of subtypes. Glycerophospholipids are commonly referred to as plain phospholipids. Within itself it contains three components. First it is constructed with a phosphorylated head group, then a three carbon glycerol backbone, and finally a two hydrocarbon fatty acid chains. The phosphorylated head group is attached to one of the glycerol hydroxyls with addition to the two hydrocarbon fatty acid chains bonded to the other two glycerol hydroxyls.3 The purpose for glycerophospholipids
itself (Curtis & Schulze, 1933). Past experiments using Dugesia dorotocephala, show the ability of planaria to regenerate after severing the organism into different parts (Sánchez Alvarado, 2006). Planaria with transversal cuts below the head and above the tail will produce regenerated segments due to the planaria’s ability to form Neoblasts and undergo epimorphosis to create new body se... ... middle of paper ... ... many organs that would prove vital for scientists to explore regeneration in
Flipping a coin of privacy with FB vs. Ca The concept of flipping a coin is not new in the affairs of men. It has been used to resolve dicey situations over time and again. Flipping a coin is considered fair generally because both the head and tail which are the two likely possibilities have equal chances of occurring. Coin Flipping; the generic use Coin flipping has been used generally and commonly in the following ways over time: Mathematics In the field of mathematics, statistics to be precise;
could not have mixed if there was no fluid in the membrane The more unsaturated phospholipids the more fluid The more unsaturated phospholipids containing unsaturated fatty acids in the membrane the more fluid it is. The “kinks” in the Hydro C tails of the unsaturated phospholipids prevent them from packing closer together, making more movement possible. Cholesterol reduces the fluidity, by preventing phospholipid movement Different types of protein are found within the membrane, each having
To prepare for my media interview on tail docking, I researched multiple tail docking experiments from Penn State libraries` databases and the “Talking to the Media Guide handout. Looking back, I should have been more relaxed during my interview. I believe that it would`ve helped me in giving my responses faster and clearer. However, I made sure that I had my “management decision” terminology, Texel breed standards, and facts about tail-biting in pigs as the three areas that I could bridge back with
the pen. Tails and storm found themselves in what looked like a mess of a waste land. Everything was white, buildings would stand with no base, and parts of them would float. “so…this is what happened to the old world…” tails said. “that wave…this is what it did to the old world…it truly is a purgatory.” Said storm, shocked by what she was seeing. “Well…well…” Tails turned to see mammoth mogul, walking with a cane in all white clothes. “mammoth…” said tails. Unlike other times, tails wasn’t intimated
Taking Chances Have you ever had your eye on the last piece of chocolate cake, but noticed your friend did also, or wanted to sit in the front seat, but was faced by your little brother or sister putting up a fight? At one point or another, everyone has found themselves in some form of disagreement or misunderstanding that has been solved with an easy solution, a coin toss. But how do you decide which side of the coin to chose? With that slice of cake calling your name, it would be quite helpful
redneck relatives? I hope he likes fish. Am I too dressed up for dinner?” W arrived at my grandmothers’ house around 5:30, at once my aunt Gaye grabs me by the arms, “Hey girl! Give your favorite Aunt Gaye a hug!” pulling me under her arm. I yanked my head away, but I already got disillusioned by the smell of month old gym clothes. “And who is this fine young boy behind you?” I was so red by this point that I just took him to the kitchen, introduced him to the rest of my family, that was there. While
dancers are graceful, elegant, and strong white tail deer that are running through the woods, searching for other animals, and being cautious of human hunters. The dancer is elegant but athletic at the same time jumping through the air simulating the gracefulness of the white tail deer. The dancer portrays the feeling of freedom that all wild things have. The dancer moves his body with proud and deliberated movements the same movements as a white tail deer running through the forest, jumping over
in male reproductive system. They are very tiny about 0.002 inches long, because they contain a long tail-like flagella. The main function of sperm cell is to carry the genetic information of male parent and form a new embryo when combined with an egg cell. The shape of the sperm is quite simple, like a structure of snake which comprises of a small ovular head, neck, middle piece and tail. Head : It is spherical in shape which mainly consists of a large nucleus and a cap-like structure called acrosome
is a mixture of sodium or potassium salts and long chain organic acids. One example of such a soap is Sodium stearate, NaCH3(CH2)16CO2. As you can see, a soap molecule is long. It has a carboxylate group called the head group which is polar and hydrophilic, or water attracting. The tail end is a fatty acid, which is non-polar and hydrophobic, or water repelling. In this way, soap is unique. One end attracts water while the other end pushes it away. Initially soaps where made by heating sodium hydroxide
She hopped down from the branch, her white paws falling right into Sage’s path. Pupils widening with excitement, the kitten brought his prey into focus. Sage’s little tail, striped with ginger and cream, thrashed wildly. As her whiskers twitched around the bird, the molly flicked a black ear in the
So, Heads or Tails? (An analysis of the major messages in Tom Stoppard’s film, Rosencrantz and Guildenstern Are Dead) Heads or Tails? The simple flipping of a coin and wondering the probability of whether it will land heads or tails up is parallel to the world and the idea of predestination. Some individuals stand firm in their belief that they have some sort of free will and that the choices that are made everyday are 100 percent due to individual thought and choice. On the flip side, so to speak