An olympic runner prepares to run a 100 meter race. which of the body systems listed will probably be least involved in the 100 meter race? a) circulatory b) muscular c) reproductive d) skeletal

C. Reproductive because the circulatory assists the runner in pumping blood into his body, his muscular is the muscles the runner uses to run, and the skeletal supports the muscles and the rest of the body while he is running. The reproductive system isn't actively being used during this 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.

It should be cryosphere and hydrosphere