Cell nucleus

Metaphase I (MI) (Assembly of meiotic apparatus) During Metaphase I, Chromosomes move together along the metaphase plate. DNA replication, repair spindle function, and chromosome segregation are controlled by regulatory mechanisms of spindle assembly checkpoints (Elledge, 1996). The cellular spindle apparatus includes the spindle microtubules, associated proteins, and any centrosomes or asters present at the spindle poles. The dynamic lengthening and shortening of spindle microtubules (Mitchison…

involves overproduction of amyloid precursor protein (APP), resulting in increased amyloid beta (Aβ) protein and damage to the blood brain barrier (9). This causes amyloid plaque formation, consequently resulting in cell death due to inflammation, oxidative stress, apoptosis and neuronal cell receptor overactivation (9). The mitochondrial cascade hypothesis of AD pathology explains that age related damage to mitochondrial DNA leads to mitochondrial dysfunction which causes oxidative stress and…

Pathophysiology: Cells in the body go through a natural state of mitosis where they replicate copies of themselves. Once a cell realizes there isn’t any more room for growing or sees a defect in itself, the cell goes through apoptosis (cell death). However, there are instances where a cell doesn’t recognize it has a defect or mutation and it starts to affect the shape of the cell. Once this mutated cell starts mitosis, it will regenerate a lot of undifferentiated cells, which turn into a…

single cell, but by the time that we are an adult, we have trillion of cells in our body. This happen because our cells are constantly dividing and when they divide they make new cells. A group of cells form a tissue, a tissue form the organ, an organ compound the system of organ and then the individual. We all have this question, why our cells are dividing constantly? Cells divide to replace old or damaged cells, and also living organism can grow and reproduce. There are two ways that cells can…

eukaryotic cells each with a set niche to make sure the body stays balanced. Form their inception cells are programmed like a computer to provide necessary functions for a person’s body. Along the lines of being like a computer all cells need power to operate. Inside the cell its organelles help the cell attain the fuel it needs to operate. Within these group of organelles is what has been aptly named the, “power plant”, of cells for it takes nutrients and converts it into fuel for cells. Since…

Observation of mitosis in Onion root tips Answer the following question to its full explanation: 1. What is Cytokinesis? Compare and contrast cytokinesis between plant and animal cells. Cytokinesis is the last step in cell division, where the cytoplasm divide and the two daughter cells appear. In Animals, the cytokinesis processes occurs through cleavage. Firstly, in the old metaphase plate position, a cleavage furrow is formed. On each sides of the furrow, a contractile ring formed of actin…

114d, and the third one is called Lily meiosis. Mitosis stages is animal cell. This sample is brown. It combined with two big parts of the cell. There are many small bubbles in first part. The sizes of bubbles inside the big bubble are random. They separate randomly. Some of them are stick together, and some of them are alone. The second part of the sample is white and brown. The second one is As 114d mitosis. It is the plant cell. The second one is brown. Personally, I think it is like the…

plan, it adds the details .Limbs and organs grown between the particular weeks of development. To form a new body parts, an area in the embryo is first marked out.genes controls and instruct the cells in area what to do. For example, become a part of an arm; cell pass on these messages to their neighbour cell.”(genetic…

into cells, each of which is dedicated to production of a part or product family or limited group of families. Parts with similar processing requirements are identified; these are then placed into logical groups called part families and the equipment requirements for each part family are subsequently determined. A part family is a collection of parts which are similar either because of geometric shape and size or similar processing steps required in their manufacture. A manufacturing cell…

Beginning From Conception to Birth, first talks about how our life begins. Every human being starts with a single cell called zygote. (Berger, pg48). All living things consists of cells that has molecules of DNA. DNA molecules are called chromosomes. Then, this chromosomes contain genes. Each one of us has 46 chromosomes that are arranged into 23 pairs. Except for our reproductive cell called gamete. There are two different types of gametes, for a man it is called sperm and for a woman it is…