Acondition in the brain, heart or other body arteries in which there is a bulge on the wall of the artery that can cause dangerous bleeding if it bursts is known as: aneurysm leukopenia bradycardia myelodysplastic syndrome submit

The condition is known as Aneurysm. 
An aneurysm refers to a weakening of an artery wall that creates a bulge, or distention, of the artery. Most aneurysms do not show symptoms and are not dangerous. The bulge can rapture and cause internal bleeding.The exact cause is unclear but certain factors contribute toe the condition,for example; damaged tissue in the arteries can play a role, arteries can also be harmed by blockages such as fatty deposits.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.