Sertoli cell

    Page 2 of 50 - About 500 Essays
  • Passive Migration Analysis

    Both navigational and migratory behaviors are seen in a large variety of vertebrates across all spheres of life. The ability to navigate and knowing when to migrate is, at least in part, genetic (Lee et al. 2013 and Smith 1985). This means that some organisms can have birth defects that will hinder their navigational and/or migratory behaviors (Lee et al. 2013). Migration is defined as a mass leaving of one place for another, pre-determined one, on a repeating basis (Merriam-Webster 2018). In…

    Words: 1100 - Pages: 5
  • Pyramidal CA1 Neurons

    Neurons are only a subset of the billions of cells in our brain, but they are the powerhouse driving everything we do. Common genetic and cellular properties define them as neurons. Beyond these defining features, neurons are heterogeneous in there gene expression, shape, and role in driving behavior (cite Zeisel et al. 2015 and Kamme et al 2003). Even within very homogenous populations such as the pyramidal CA1 neurons, there is significant variation in neuronal properties. This leads to…

    Words: 1222 - Pages: 5
  • Ethically Informative Essay: The Stem Cell Debate

    Scientists are using stem cells to mess with the embryos they come from and diseases common all around the world. This topic is so popular people feel that “a fixation on it alone has come at the cost of many other important issues being overlooked or, at the very least, under-examined” (Lysaght, Tamra, and Alastair V. Campbell 251). Stem cells are undifferentiated cells that can be transformed into any type of cell (Rebecca). Scientists take these cells to make new cells, tissues, and organs to…

    Words: 1676 - Pages: 7
  • Animal Physiology: The Biological Form Of An Animal

    thus peptide bonds get exposed and vulnerable to pepsin. Proteins are cut up into smaller polypeptides by pepsin. The gastric juice does not destroy the stomach cells because they are activated only when they reach the lumen. HCL composes of hydrogen and chloride ions that are secreted by parietal cells. Pepsin is released by chief cells in the inactive form, pepsinogen. It is the HCL that catalyzes the chain of events of making pepsin…

    Words: 1730 - Pages: 7
  • The Rh Factor Essay

    blood type system, because it hooks 45 different surface antigen on the surface of the red cells that are controlled by two closely linked genes on chromosome 1. The antiserum for blood sample was the outcome results of the research that was done on the rhesus monkeys which lead to the naming of the Rh system. (Oneil, 31-07-2015) The RH factor works in a certain way, when the antiserum agglutinate your red cells you are Rh positive (Rh+) and when it does not , you are Rh negative (Rh-).Although…

    Words: 883 - Pages: 4
  • Mendelian Inheritance Lab Report

    Mendelian inheritance is centered around three laws discovered by Gregor Mendel. First is the law of segregation which states that during the formation of gamete the two allele pairs separate randomly. The second law is independent assortment which states during gamete formation each pair of the allele will segregate independently of the rest of the pairs of the chromosomes. The third law is the law of dominance which is that alleles can be dominant or recessive with the expression of the…

    Words: 1132 - Pages: 5
  • Goldfish Respiration Experiment

    Respiration Rate Analysis on Goldfish While Being Exposed to Varying Water Temperatures Avarie Wideman, Bronwyn Edgell, Brooke Farrell, Shannon Porter & Emma Milne 1 Uxbridge Secondary School, Uxbridge, Canada ________________________________________ Results After completing the goldfish respiration experiment we were left with an abundance of data that has lead us to these results. Through the experiment we have discovered that the goldfish's respiration is affected when exposed to extreme…

    Words: 811 - Pages: 4
  • Protein Solubility

    innate protein particles or aggregates.However, there is a mechanistic difference between the two aspects. In the case of a pure solubility issue, i.e. a protein becomes insoluble in a certain solution (no changes in protein structure and integrity) and a solid phase is formed, a strong dilution of the system may lead to the dissolution of the protein. In such a circumstance, the term “protein associates” may more appropriately describe the formed protein solid .In this instance, protein…

    Words: 833 - Pages: 4
  • Human Cloning Essay

    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…

    Words: 1744 - Pages: 7
  • Onion Cell Experiment

    Comparing and Discovering the Properties of Animal and Plant Cells INTRODUCTION: Scientists have developed classification units among livings. One of this classification types is kingdoms. It represents widely covered societies, including Animalia and Plantae. It is known that all livings are composed of cells, from the cell theory, so animals and plants also have a cell association. The cellular structures of animal and plants cells are clearly different. These structural differences will be…

    Words: 1039 - Pages: 5
  • Page 1 2 3 4 5 6 7 8 9 50

Related Topics:

Popular Topics: