Cheek cell practical Task 2 Risk assessment HAZARD RISK MITIGATION Methylene blue stains wear apron/gloves Swab stick spreading bacteria dispose correctly Microscope slide break/cut skin handle with care Cover slide break/cut skin handle with care Microscope drop/fall on foot position carefully
Premium Cell nucleus Bacteria Gene
Cells must move materials through membranes and throughout cytoplasm in order to maintain homoeostasis. The movement is regulated because cellular membranes‚ including the plasma and organelle membranes‚ are selectively permeable[1]. The purpose of an automatic flow of molecules is to create equilibrium on each side of the membrane. In order for molecules to pass through the membranes‚ there must be pores. The size of the pore determines what molecules can cross. Due to the size and polarity‚ only
Premium Cell membrane Protein Cell
regions of membrane lipids involved in cell signaling are called lipid rafts. • Hopanoids are sterol-like molecules found exclusively in bacteria. • Membranes from cells grown in media enriched with stearate are less fluid than normal membranes. This is because the membranes have more saturated fatty acids. • The functions of the biological membrane are : • They contain receptors for the detection of external signals • They provide a means of cell to cell communication • They regulate movement
Premium Cell membrane Protein Lipid bilayer
Give reasons (s) 1- Formaline is used as fixative in preparation for LM examinations 2- Resolution power is difference from magnification power Complete 1- The cells are the smallest …… and …… units in the body. 2- The size of tissue sample for histological preparation is …… in light microscope and ……. in electron microscope. 3- Fixative used in tissue preparation for LM examination is …….. while in EM is …….. 4- Substance used for tissue embedding in preparation for LM examination is
Premium Cell Organelle Endoplasmic reticulum
USE ALTERNATIVE FUELS‚ SAVE PLANET EARTH We are all aware of the current state of our environment. Mother Earth is on the brink of total destruction brought about by pollution‚ irresponsible use of resources‚ and the excessive use of conventional fuel such as fossil fuel and nuclear energy. Part of the efforts to save our planet is to shift from using conventional fuels to alternative ones such as wind energy‚ solar‚ tidal‚ wave‚ oceal‚ thermal‚ dendrothermal‚ biogas and biodiesel‚ alcohol
Premium Energy development Fossil fuel Wind power
ENERGY RESOURCES ABSTRACT The electricity requirements of the world including India are increasing at alarming rate and the power demand has been running ahead of supply. It is also now widely recognized that the fossil fuels (i.e.‚ coal‚ petroleum and natural gas) and other conventional resources‚ presently being used for generation of electrical energy‚ may not be either sufficient or suitable to keep pace with ever increasing demand of the electrical energy of the world
Premium Fuel cell Electrochemistry Energy development
stimulating the early implementation of economically viable sustainable energy technologies. One among them is the fuel cell technology. The paper will give the answers about the fuel cell technologies‚ providing a short description of how they work‚ areas of operation and cost considerations. This paper addresses the technical viability and economy of using various types of fuel cells to replace all the existing conventional power plants . INTRODUCTION: . The hydrogen economy consists of many
Premium Fuel cell Electrochemistry Nuclear power
Differences between fossil fuel and renewable energy One of the great issues facing world in the 21st century is how best to obtain the energy for supporting operations: heat and light‚ transportation‚ production and delivery of goods and services. Fossil fuel supplies nearly 90 percent of the energy‚ according to the U.S. Department of Energy. In contrast‚ only %5 is provided by renewable energy. There are several differences between fossil fuel and renewable energy. Fossil fuel are including: oil
Premium Renewable energy Fossil fuel Energy
Biology – Assignment One Cells. Question One Explain the roles of the main components and features of a cell to the cell function. A typical animal cell is rounded in shape‚ surrounded by a cell membrane. This holds in the cytoplasm‚ which contains other structures such as the nucleus‚ ribosomes‚ and mitochondria. Each cell has tiny structures inside called organelles; each type of organelle performs a particular function. For example there are mitochondria (power stations)‚ ribosomes (protein
Premium Cell Organelle Eukaryote
Stem cells -are biological cells found in all multi cellularorganisms‚ that can divide (throughmitosis) and differentiate into diverse specialized cell types and can self-renew to produce more stem cells. In mammals‚ there are two broad types of stem cells: embryonic stem cells‚ which are isolated from the inner cell mass of blastocysts‚ and adult stem cells‚ which are found in various tissues. In adult organisms‚ stem cells and progenitor cells act as a repair system for the body‚ replenishing
Premium Stem cell