ANSC 4402 GENETICS AND CONDITIONING EXAM
QUESTIONS AND ANSWERS A+ GRADED
twitch
the contraction and relaxation of a muscle fiber is called a ___
slow twitch, fast twitch high oxidative (FTa), fast twitch low oxidative (FTb)
what are the 3 muscle fiber types?
athletic
fiber type influences ___ potential
3
fast twitch fibers contract ___ times faster than slow twitch fibers
red fibers or type 1 fibers
what are slow twitch muscle fibers also known as?
oxygen
mitochondria use ___ to burn fatty acids or glycogen
endurance activities (high tolerance against fatigue)
what are slow twitch muscle fibers best for?
capillaries
slow twitch muscle fibers are surrounded by ___ so oxygen can quickly reach them
contract slowly and are able to hold that contraction for a relatively long time
without fatigue
what are slow twitch muscles able to do?
white fibers or type 2 fibers
what are fast twitch muscle fibers also called?
have high concentrations of enzymes that rapidly produce energy from glycogen
what do fast twitch muscle fibers have and what do they do?
FTa or 2A fibers and both
what are fast twitch high oxidative muscle fibers called and do they use aerobic or
anaerobic metabolism?
FTb or 2B fibers
they use anaerobic metabolism only, they lack enzymes necessary to use oxygen
(even if present), and they have the fastest contractility of all the fibers
what are fast twitch low oxidative muscle fibers called? and what makes them different
from high oxidative?
hereditary and breed
what determines fiber types?
cannot
slow twitch fibers can or cannot be trained to contract any faster?
initial warm-up, a few minutes into warm-up, continued exercise
what are the 3 stages of exercise/use of muscle fibers?
capillaries are not yet supplying oxygen to the muscle. muscles must use the
anaerobic fuel source, phosphocreatine, in the fast twitch muscle fibers
what happens in the initial warm up?
QUESTIONS AND ANSWERS A+ GRADED
twitch
the contraction and relaxation of a muscle fiber is called a ___
slow twitch, fast twitch high oxidative (FTa), fast twitch low oxidative (FTb)
what are the 3 muscle fiber types?
athletic
fiber type influences ___ potential
3
fast twitch fibers contract ___ times faster than slow twitch fibers
red fibers or type 1 fibers
what are slow twitch muscle fibers also known as?
oxygen
mitochondria use ___ to burn fatty acids or glycogen
endurance activities (high tolerance against fatigue)
what are slow twitch muscle fibers best for?
capillaries
slow twitch muscle fibers are surrounded by ___ so oxygen can quickly reach them
contract slowly and are able to hold that contraction for a relatively long time
without fatigue
what are slow twitch muscles able to do?
white fibers or type 2 fibers
what are fast twitch muscle fibers also called?
have high concentrations of enzymes that rapidly produce energy from glycogen
what do fast twitch muscle fibers have and what do they do?
FTa or 2A fibers and both
what are fast twitch high oxidative muscle fibers called and do they use aerobic or
anaerobic metabolism?
FTb or 2B fibers
they use anaerobic metabolism only, they lack enzymes necessary to use oxygen
(even if present), and they have the fastest contractility of all the fibers
what are fast twitch low oxidative muscle fibers called? and what makes them different
from high oxidative?
hereditary and breed
what determines fiber types?
cannot
slow twitch fibers can or cannot be trained to contract any faster?
initial warm-up, a few minutes into warm-up, continued exercise
what are the 3 stages of exercise/use of muscle fibers?
capillaries are not yet supplying oxygen to the muscle. muscles must use the
anaerobic fuel source, phosphocreatine, in the fast twitch muscle fibers
what happens in the initial warm up?
