Understanding Insulin In Our Bodies

Overview Insulin is made in the beta cells of the pancreas. Its role is to maintain a state of glucose homeostasis in the bloodstream. Insulin responds to hyperglycaemia and is responsible for bring blood glucose levels down. It also promotes the uptake of excess glucose from the blood stream to the liver, muscle cells and […]

How Skeletal Muscles Work

  In order to make our skeletal muscles work, we send messages from the brain via nerve impulses through our central nervous system to particular muscle fibres commanding them to contract (shorten by contracting). The nerve endings fire bursts of energy into the fibres. As a result, they contract and pull on our tendons, which […]