What are beta receptors?

beta receptors or beta adrenergic receptors are part of a sympathetic nervous system. The sympathetic nervous system has a continuous effect, but is also responsible for the physical changes that occur in an emergency and create a well -known combat or flight response. These effects in the body are caused by the release of hormones called adrenaline and noradrenaline, which bind to the alpha and beta adrenergic receptors to the target organs and activate them to cause specific changes. The heart beats faster, blood pressure rises, the airways spread and digestion is inhibited. Beta receptors are found in a muscle in the heart, blood vessels, airways and uterus and oily tissue. Beta receptor should not be confused with what is called beta cell receptor, which is found on beta cells in the pancreas. In many cases, beta receptors are placed on smooth muscles, which is not under voluntary control, and their activation leads to muscle relaxation. Beta1 receptors found on the heart muscle are odliSné. When hormones attach and activate them, the heart is stimulated to beat faster and more strongly.

Beta2 receptors are found on smooth muscles in the walls of blood vessels, respiratory passages and in the uterus. Their activation inhibits the contraction of muscles, causing the spread of blood vessels, the airways spread and the uterus relax. Beta3 receptors are located in oily tissue. When activated, they stimulate fat disintegration, a process known as lipolysis, although the meaning is not fully understood.

medicines that stimulate beta receptors can be used to treat conditions such as asthma in which the muscle spasms prevent normal breathing. Medicines that selectively affect beta2 receptors are used on the smooth muscles of the walls of respiratory passages. They cause the muscles to relax, expand the airways and allow the patient to breathe.

Known as beta-blockers have been developed for blocking beta receptors that prevented hormones to bind and activate them. Some of these drugs are blocking beta1 and beta2 receptors. One example is propranolol, which is used to treat high blood pressure or hypertension. It reduces the speed and strength with which the heart beats, but can also affect breathing by narrowing the airways. Other medicines that selectively block Beta1 receptors have a less breathing effect, although it can still be too much for some people with asthma.