Cell division

skin consists of three main layers including epidermis, dermis and subcutis that are responsible for its high turnover capacity in repairing different injuries. Similar to other tissues, the stem cells existed in skin tissue play an important role in regulating the balance between cell loss and cell division [22, 23]. siRNA therapeutics are potent alternative for skin regeneration due to their accessibility in the body [24]. Skin repair based on siRNA therapy have yielded promising results for…

In the chapter titled, “Immortality,” Matt Ridley discusses the idea of the immortal cell theory. He presents some case studies as well as his own speculations. To began, he explains how the origin of the first cell is still alive in us today and although this is true it does not mean our species will live forever. The function of our life and all life is to reproduce but to get to that we have over came many challenges. On Chromosome 14, the presence of the TEP1 gene seems to be the source of…

genetic information in cells and some viruses, consisting of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine. DNA sequences are replicated by the cell prior to cell division and may include genes, intergenic spacers, and regions that bind to regulatory proteins. DNA A. adenine T. thymine C. cytosine G. guanine What is RNA ? A nucleic acid present in all living cells and many…

unit of life is the cell. All living things are composed of cells. Cells may only from through a process of division and replication of previously existing cells. Cells are microscopic; however their structure is complex. All types of cells possess a plasma membrane which separates its contents from its surroundings. . There are two types of cells: prokaryotic and eukaryotic. a. Prokaryotic cells are simpler than eukaryotic cells. Within prokaryotic cells are bacteria cells and archaea. All…

efficiently change the internal organization of the cell, and capture organelles through the cytosol. Intermediate filaments are made up of the protein keratin. Their primary function is to strengthen the internal structure of a cell. Microfilaments are the smallest among the three cytoskeletal filaments. They consist of protein actin. Microfilaments are dynamic structures that can rapidly disassemble or assemble themselves, and thus microfilaments enable the cell to move efficiently. Cilia and…

All symptomatic males tested had a forty-seventh chromosome in their cells. Though this may seem like a minimal change beyond the norm, these are the instructions for how the body should develop and if anything is thrown off balance it could result in extreme anomalies. During a process called meiosis, a type of cell division, a sperm or egg may experience a critical error called nondisjunction where the sex chromosomes do not split correctly. When…

Movement of cells are important since some cells depends on movement to carry out its major function. For example, sperm cells need to move from one place to another place to carry out reproduction. Movement of cells are supported by cytoskeleton system of the cells. The cyctoskeleton system are composed of microtubules, microfilaments and intermediate filaments. However, for unicellular organisms such as Paramecium, the movement of cells are regulated through cilia or flagella. Cilia can be…

mature somatic cell is removed from an organism, and the DNA is transferred to an egg cell whose DNA has been removed. This is commonly referred to as somatic cell nuclear transfer or SCNT. Finally, the egg starts the reproductive process and attaches to the uterus of a female in the same species. This results in a whole organism with the same genetic makeup of the donator of the somatic cell (See Appendix B for a diagram of the process). The last type, therapeutic cloning, occurs when a cell is…

It was an honor to have Dr. Jeremy Boss deliver an informative presentation regarding his current research. Dr. Boss presentation was entitled; “Epigenetic regulation of adaptive immune responses”. Dr. Boss’ research is conducted at the illustrious Emory University of Medicine. At his institution, Dr. Boss research efforts are focused around microbiology and immunology. His efforts are to find out how to stop the adaptive immunity diseases. During his presentation, Dr. Boss stated that the…

disease of the body cells. When a cancerous tumour spreads, cells divide and travel to other body parts through blood or lymph where they then destroy tissues and grow into tumours. After heart disease cancer is the most feared death cause, however there are cases where patients are being cured from it and improvements to diagnosis and treatment are being…