Ultrafiltration The nephron is the functional unit of the kidney – the nephrons are responsible for the formation of urine The process of urine formation in the kidneys occurs in two stages:...
Structure of the Kidney and the Nephron Humans have two kidneys The kidneys are responsible for carrying out two very important functions: As an osmoregulatory organ - they regulate the wate...
Required Practical: Producing a Dilution Series and Calibration Curve An alternative version of Benedict’s solution can be used to carry out a quantitative test on an unknown urine sample to...
The Causes of Diabetes There are over 3 million people suffering from diabetes in the UK Diabetes is a condition in which the homeostatic control of blood glucose has failed or deteriorated ...
The Role of the Liver in the Conversion Between Glycogen & Glucose The liver plays a vital role in the conversion between glycogen and glucose The conversion between these molecules help...
The Role of Adrenaline A hormone called adrenaline can affect blood glucose concentration When it is secreted it increases the concentration of blood glucose It does this by binding to diffe...
The Action of Glucagon If the concentration of glucose in the blood decreases below a certain level, cells may not have enough glucose for respiration and may not be able to function normall...
The Action of Insulin If the concentration of glucose in the blood decreases below a certain level, cells may not have enough glucose for respiration and may not be able to function normally...
Negative Feedback The majority of homeostatic control mechanisms in organisms use negative feedback to maintain homeostatic balance (ie. to keep certain physiological factors, such as blood ...
