Video shows what sporophyte means. A plant (or the diploid phase in its life cycle) which produces spores by meiosis in order to produce gametophytes.. Sporo...
Concentric contraction involves a shortening of the muscles under loading and is used to accelerate the body or move an object, as when you suddenly move in the opposite direction to hit the baseball.
A concentric contraction is a type of muscle contraction in which the muscles shorten while generating force. During a concentric contraction, a muscle is stimulated to contract according to the sliding filament mechanism.