Types of Nitrogenous Waste Nitrogenous waste comes from the breakdown of excess dietary amino acids and nucleic acids The waste is first converted into ammonia; some organisms excrete it in this fo...
ADH Living organisms can maintain a safe balance of water and solutes in their bodies by osmoregulation Osmoregulation is an example of homeostasis The kidneys play an important role in osmoregulat...
Conserving Water & the Loop of Henlé Animals that live in dry environments such as deserts depend on their ability to conserve water for survival Such animals often have very long loops of Henl...
Ultrastructure of the Glomerulus and Bowman's Capsule Introduction to kidney structure Humans have two kidneys, which remove waste products from the blood and maintain the blood's balance of water ...
Organisms & Osmolarity in the Environment Living organisms need to maintain a safe balance of water and solutes in their cells Failure to maintain this balance will mean that an organism's cell...
Analysing Muscle Contractions in Electron Micrographs Many biological structures are too small to be seen by the naked eye Optical microscopes are an invaluable tool for scientists as they allow fo...
Annotating the Human Elbow The human elbow is an articulated synovial joint which means that it is a junction where two moving bones meet encapsulated in synovial fluid It consists of several compo...
Sliding Filament Model The thick filaments within a myofibril are made up of myosin molecules These are fibrous protein molecules with a globular head The fibrous part of the myosin molecule anchor...
Skeletal Muscle Fibres: Structure Muscles in the body that are attached to the skeleton and aid movement are called skeletal muscles Other muscle types include: Cardiac muscle which is found in the...
