Which of the following is an example of proper movement for a biceps curl?
rotate the arm at the shoulder with the back straight
bend the arm at the elbow with the back straight
rotate the elbow and arch the back
bend the elbow and move the upper arm forward

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.