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What muscle contains sarcolemma sarcoplasm filaments and myofibrils?
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What part of the muscle cell contains myofibrils?
The sarcoplasm
What myofibril contains only thick myofilaments?
No, myofibrils contain both thick filaments (myosin) and thin filaments (actin) which when activated overlap each other as part of muscular contraction.
Which organelles contains the contractile elements found in skeletal muscle?
Myofibrils
What contains actin filaments?
Microfilaments contain actin filaments. They are the thinnest filaments of the cytoskeleton, which is a structure found in the cytoplasm of eukaryotic cells.
What contains filament?
Microfilaments contain actin filaments. They are the thinnest filaments of the cytoskeleton, which is a structure found in the cytoplasm of eukaryotic cells.
Structure of muscle?
the sacromere, contains two kinds of filaments.
How is the H band distinguished from the other prominent structural features of the sarcomere?
It is a lighter region that contains thick filaments, but no thin filaments.
Describe the major events of muscle fiber contraction?
Muscle fiber contraction is a complex process involving a number of cell parts and chemical substances that result in the sliding movement of the actin and myosin filaments and causes a contraction. A myosin filament is composed of protein strands with globular ends called cross-bridges that extend outward along the length of the filament. The actin filaments have ADP molecules attached to its surface that serve as active sites for linking the cross-bridges of the myosin filaments. Although the process is not completely understood, the sliding filament theory suggests that the myosin cross-bridge attaches to an actin active site and bends slightly, pulling the actin with it. It releases its attachment, straightens, and combines with another active site further down the actin filament, causing the sarcomere to shorten. When the nerve impulse reaches the distal end of its branch, acetylcholine is released into the gap. The acetylcholine diffuses rapidly across the motor end plate and combines with protein receptors in the sarcolemma. This causes a muscle impulse to be generated and pass in all directions over the entire sarcolemma, and through the T-tubules deep into the fiber. The S.R., which contains a high concentration of calcium ions, becomes more permeable and allows the ions to diffuse into the sarcoplasm. When a high enough concentration is present in the sarcoplasm, the linkages between the actin and myosin filaments occur and contraction takes place. The calcium ions are moved quickly back into the S.R. by an active transport system (calcium pump). When enough calcium ions have been removed from the sarcoplasm, the muscle relaxes. At the same time, the acetylcholine is rapidly decomposed by the enzyme cholinesterase. This prevents a single nerve impulse from causing a sustained contraction.
The area of the sarcemere that contains only thin filaments?
It's the I Band.
The area of the sarcemere that contains only thick filaments?
H zone
What is a corrolla?
a corolla contains a stamen. it also has a lot of filaments and anther.
What contains overlapping thick and thin filaments?
up your derriere it is very yummy
