Anticorpos - ajudando os leucócitos

Hello, little scientists, I am Professor Bill Tyson and together we are going to know different forms of science. In our last episode, we talked about leukocytes and their struggle to defend our body from invaders. But they are not alone, rely on the help of proteins called Antibodies.

Let's see how they act. We are constantly attacked by microscopic organisms, which activate our defense system, these organisms are called antigens. We then have a specific leukocyte, called the B-lymphocyte, which recognizes the invading cells.

Once recognized the antigen B lymphocyte initiates the production of antibodies. They leave for the attack, attaching themselves to the antigen. Some prevent the attacker from multiplying.

Some try to break down the plasma membrane. While others call leukocytes to do phagocytosis. Each type of antibody works with a particular type of intruder, in a process called Antigen-antibody.

The way the antibody connects is possible only if it is the antigen it fights. Like a key, it opens only a specific type of lock. And this ability to bind to the antigens is called agglutination.

Our body also has a great memory. If our defense system fights an antigen once, it will not forget it. And whenever this antigen tries to enter again the leukocytes and the antibodies will be there to fight it.

For now, it's just personal, see you next time. Hey guys. Show small scientists that studying science can be fun, and share this video.