Which statement best describes fast-twitch muscle fibers?Multiple Choicemotor unit contains many fibers that are designed for strength and working under anaerobic conditionsmotor units that contain many fibers are are designed for endurance and working under anaerobic conditionsmotor units with few muscle fibers that are useful for endurance activitiesdark in color, contain large numbers of mitochondria and good for strength

Select all correct descriptions of fast-twitch muscle fibers.Multiple select question.Helpful in sprinting or swinging a golf clubHighly resistant to fatigueUsually anaerobicMany fibers in motor unitsDark in color

Choose the muscle fibers that contract more slowly, have more mitochondria and are more fatigue resistant.Multiple choice question.Slow-twitch muscle fibersFast-twitch muscle fibers

Which type of muscle fiber contributes most to muscular endurance?Group of answer choicesall answers are correctcardiacfast-twitchslow-twitch

Which of the following describes slow-twitch fibers?Multiple ChoiceThey have few mitochondria.They have very little myoglobin.They have a rich blood supply.They have high levels of lactic acid.They rely on anaerobic respiration.

Select all that applySlow twitch or Type I muscle fibers Blank______. Multiple select question.respond rapidly to nervous stimulationhave high aerobic capacity but low anaerobic capacityhave a fast form of myosin ATPase, which allows them to break down ATP more rapidly than other muscle fiber typeshave the highest resistance to muscle fatiguehave well developed blood supplies