Lactose intolerance
a disorder characterised by abdominal cramps and diarrhoea after the consumption of food containing lactose (for example milk, ice cream), believed to occur due to a deficiency of intestinal lactase (enzyme that breaks down lactose), may appear first in young adults who have previously tolerated milk well as infants.
The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and then transferred to the internal environment by absorption. Find out more about these processes carried out by the gastrointestinal system through this tutorial...
This tutorial focuses on the way genes control and determine every aspect of the body. It describes lac operon as an example. It also gives an overview of the inborn error of metabolism...
The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial will help you understand the chemical composition of the body. This will come in handy when considering the various interactions between cells and structures. ..
Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an overview of the different carbohydrates and fats the body needs, read this tutorial...