every human body has an unaccountable number of this basic unit of a muscle as
a.)muscle fibers
b.)liagments
c.)tendons
d.)muscle
slow twitch muscles are needed for
a.)high intensity , quick , short bursts of energy
b.)endurance activities
c.)speed or power activites
d.)low endurance and short durations excerises
a group of muscle fiber responsible
when a muscle fiber contracts as much as it is called the _______.
a.)maximum potiental
b.)contraction principle
c.)muscular capacity principle
d.)all or none principle
select the answer below that best fits the following description
-voluntary
-come in pairs
-attatch the bones through tendons
-made up of long , cylindrical fibers
a.)skeletal muscles
b.)cardiac muscles
c.)smooth muscles
d.)contracted muscles
