Biocheminsider Transpiration Guttation It is a process by which plants exhale water vapour through the stomata. It is a process of secretion of water droplets from the pores of vascular plants such as grass. Transpiration occurs through stomata and lenticels. Guttation occurs through Hydathodes, which are commonly found in angiosperms. In this process, only pure water … Read more
A monosaccharide is a simple sugar that constitutes the building blocks of a more complex form of sugars such as oligosaccharides and polysaccharides.The term monosaccharide etymologically means “single saccharide”. In other words, Monosaccharides are the building blocks of disaccharides (such as sucrose and lactose) and polysaccharides (such as cellulose and starch). Examples are fructose, glucose, and … Read more
1. Open MRI Scans – High-Field (1.5T) A high-field (1.5T), open MRI delivers superb image quality: Open MRI: This refers to the configuration of the equipment. The Open MRI creates a bright imaging and a relatively roomy experience because it is open on three sides. It has a modern design which yields quick and comfortable exams, which is particularly … Read more
The autonomic system is made up of two divisions, the sympathetic and parasympathetic systems. They usually work antagonistically in the organs, but in a well integrated manner. It is the balance of the actions of both divisions that maintains a stable internal environment in the body. The parasympathetic nervous system is a subdivision of the autonomic nervous system (ANS) which … Read more
Reviewed by Drs Natasha Sewpersad and Yasmin Goga, Inkosi Albert Luthuli Central Hospital, and Sunil Soni, Chairperson: South African Thalassaemia Association, June 2010 The 7 Types of Anemia Include: Iron deficiency anaemia Thalassaemia Aplastic anaemia Haemolytic anaemia Sickle cell anaemia Pernicious anaemia Fanconi anaemia Iron Deficiency Anaemia Overview The most common form of anaemia is iron … Read more
The endoplasmic reticulum is the major site of synthesis in the cell. It is a system of flattened sacs (cisternae) that are continuous with the outer nuclear envelope. Its physiological function has a very close association with that of the Golgi apparatus and together, they form the secretory pathway of the cell. The endoplasmic reticulum is classified as either rough … Read more
What is Fick’s law of diffusion? Fick’s law of diffusion explains the diffusion process (movement of molecules from higher concentration to lower concentration region). In 1855, Adolf Fick described the Fick’s Law of Diffusion. A diffusion process that obeys Fick’s laws is called normal diffusion or Fickian diffusion. A diffusion process that does NOT obey Fick’s laws … Read more
Modulus of rigidity is the ratio of shear stress to the corresponding shear strain within the proportional limit of a material. Modulus of rigidity is also known as shear modulus and rigidity modulus values of materials are determined by torsional tests. Modulus of rigidity formulas are G = τ/γ and G = E/(2(1+v)). Here τ … Read more
Poisson’s Ratio is defined as the ratio between the lateral contraction (expansion) strain to the longitudinal extension (contraction) strain when an object is subjected to an external tensile (compressive) force along its longitudinal axis. When a solid bar is subjected to tensile force along its longitudinal axis, the length of the bar increases in the direction of application of … Read more