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Mostly muscle cells
Cameron Hirthe
Wiki User
∙ 8y agoYes they do have fibers.
Muscle fibers are skeletal that is surround by plasma membrane. The plasma membrane has sarcoplasm.
Wiki User
∙ 13y agoIf you're referring to visual stripes like you see on anatomy pictures then no. Muscles are layered in the "stripes" you see in anatomy pictures.
Wiki User
∙ 14y agoa mixture of fiber types
Wiki User
∙ 11y agoyes
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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.
Are the most body movements isotonic or isometric?
Most body movements involve isotonic muscle contractions: the muscle fibers either lengthen or shorten as they contract.An isometric contraction involves the muscle fibers staying the same length. Holding something steady, or pushing against a brick wall, are examples of isometric contraction.
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 a muscle in the body when it gets longer?
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.
Do all cardiac muscle fibers all contract at the same time?
No. The heart muscle contracts in sections, first the top (atrium) then the bottom (ventricle). But when it is working properly, the heart muscle fibers contract together in large groups.
Does increased muscle density mean more myofibrils per muscle fiber?
Yes, it means that you will gain more myofibrils per muscle fiber. A muscle fiber is a muscle cell, and everybody has about the same number. When you train your muscles, they will develop more myofibrils inside the muscle cells. So you cannot change the number of muscle fibers, or cells, but you can change the number of fibers, or myofibrils, inside them. The end result is more muscle density, not more muscle cells.
What is a pennate muscle?
Pennate MusclesIn a pennate muscle, the fascicles form a common angle with the tendon. Because the muscle cells pull at an angle, contracting pennate muscles do not move their tendons as far as parallel muscles do. But a pennate muscle contains more muscle fibers--and, as a result, produces more tension--than does a parallel muscle of the same size. (Tension production is proportional to the number of contracting sarcomeres; the more muscle fibers, the more myofibrils and sarcomeres.)
How do your muscles inlarge?
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
Why do same cells contain many mitochondria?
Skeletal muscle cells, for instance, contain many mitochondria because the energy consumed in the contraction of the sarcomere is enormous. Skin cells, for instance, contain much less mitochondria as the cellular work the need to do is minimal compared to skeletal muscle cells.
Why do most gay people have no muscle?
This is untrue. Gay people have muscle in the same percentages as straight people.
What is uterine fibrodes?
Uterine fibroids refer to benign tumors that start in the uterus. They are the same smooth muscle fibers as the uterine wall but they are denser than normal uterine wall.
