When you stop using tobacco, your senses of smell and taste will return within

They will start to return in about 48 hours or so. Smoking damages the nerve endings on taste buds. But some studies have shown those nerve endings can start to improve within 48 hours once you stop exposing them to cigarettes. And foods will start to taste better; especially sweet, bitter and salty foods as those are the losses most felt by smokers. And since smell and taste are directly linked your sense of smell will also improve at the same time.

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.