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ofcourse not; slow twitch muscle fibers are: * smaller in diameter * red in color * depend on oxidative phosphorylation for their ATP supply * are highly vascularized (better blood supply) * have more mitochondria * more myoglobin fast twitch muscle fibers * larger * white * glycolysis is the source of ATP * less vascularized * less mitochondria * less myoglobin

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โˆ™ 2009-01-28 13:39:30
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Q: Are slow twitch and fast twitch muscle fibers the same size?
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Are the slow twitch and fast twitch the types of muscle fibers?

technically muscle fibres are classified as red or white but they are the same thing


What are the Fast twitch muscles and slow twitch muscles?

there actually called fast twitch fibres and slow twitch fibres ! and fast twitch fibres are in your muscles and they determine if your going to be fast at a certain thing or the slow twitch fibres the same but slowly :) if you have more fast twitch fibres you will be faster then someone with more slow twitch fibres. like usain bolt he has a lot of fast twitch fibres that's why he is so fast !


Does cardiac muscle and heart have the same relationship?

The heart is composed of cardiac muscle fibers. It is the same thing.


Is a muscle cell a fiber?

Yes, biologists often refer to skeletal muscle cells as fibers, although they aren't the same as plant fibers.


How does muscle contraction occurs?

Muscle fiber generates tension through the action of actin and myosin cross-bridge cycling. While under tension, the muscle may lengthen, shorten, or remain the same. Although the term contraction implies shortening, when referring to the muscular system, it means muscle fibers generating tension with the help of motor neurons (the terms twitch tension, twitch force, and fiber contraction are also used).


Which is the trigger mechanism to initiate contraction in skeletal muscle?

Muscle fiber generates tension through the action of actin and myosin cross-bridge cycling. While under tension, the muscle may lengthen, shorten, or remain the same. Although the term contraction implies shortening, when referring to the muscular system, it means muscle fibers generating tension with the help of motor neurons (the terms twitch tension, twitch force, and fiber contraction are also used).


How do you enlarge the muscles?

Working out with weights will stress the muscles so that, while you rest, they rebuild bigger and stronger. Trauma to the Muscle: Activating The Satellite Cells When muscles undergo intense exercise, as from a resistance training bout, there is trauma to the muscle fibers that is referred to as muscle injury or damage in scientific investigations. This disruption to muscle cell organelles activates satellite cells, which are located on the outside of the muscle fibers between the basal lamina (basement membrane) and the plasma membrane (sarcolemma) of muscles fibers to proliferate to the injury site (Charge and Rudnicki 2004). In essence, a biological effort to repair or replace damaged muscle fibers begins with the satellite cells fusing together and to the muscles fibers, often leading to increases in muscle fiber cross-sectional area or hypertrophy. The satellite cells have only one nucleus and can replicate by dividing. As the satellite cells multiply, some remain as organelles on the muscle fiber where as the majority differentiate (the process cells undergo as they mature into normal cells) and fuse to muscle fibers to form new muscle protein stands (or myofibrils) and/or repair damaged fibers. Thus, the muscle cells' myofibrils will increase in thickness and number. After fusion with the muscle fiber, some satellite cells serve as a source of new nuclei to supplement the growing muscle fiber. With these additional nuclei, the muscle fiber can synthesize more proteins and create more contractile myofilaments, known as actin and myosin, in skeletal muscle cells. It is interesting to note that high numbers of satellite cells are found associated within slow-twitch muscle fibers as compared to fast-twitch muscle fibers within the same muscle, as they are regularly going through cell maintenance repair from daily activities


How long does your body build muscle for after weight lifting?

It takes a few days, beginning immediately. This is why you shouldn't train the same muscles for a few days. It takes a little less though for slow-twitch fibers, like those of your abs.


After weight lifting how long does your body build muscle?

It takes a few days, beginning immediately. This is why you shouldn't train the same muscles for a few days. It takes a little less though for slow-twitch fibers, like those of your abs.


Does most muscle contain a fibers of the same type?

a mixture of fiber types


What kind of muscle makes your heart?

You call it as cardiac muscles. The muscle fibers contract rhythmically. The muscle fibers are attached to each other end to end. This facilitates the conduction of the impulse. The muscle fiber can be stimulated to give you contraction of the the same.


What happens to the muscle cells as they become larger?

You get stronger. The individual muscle fibers become thicker with more myofibrils inside them. The number of muscle cells stays the same, contrary to popular belief that you grow more muscle fibers, this is not true.

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