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Microfilaments contain actin filaments. They are the thinnest filaments of the cytoskeleton, which is a structure found in the cytoplasm of eukaryotic cells.
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Where are actin filaments only located?
in the A band
What are two myofilaments that slide past one another to allow muscle cells to contract?
Actin and Myosin
What part of the cytoskeleton is made of actin subunits?
Micro filaments
If a researcher was interested in slowing down the movement of amoebas by disrupting their cell membranes which protein filaments should she be studying?
Considering that Amoeba sp., among other animal cells, possesses the capacity of dynamic surface extensions containing actin filaments. These filaments produce pseudopodia-stubby distensions of the actin cortex-with which they walked over surfaces. Therefore if there is an interest in slowing down the movement we would have to be interested in fibroblast cells that regularly extend a thin, sheetlike process known as lamellipodium, which contains a dense meshwork of actin filaments. Moreover, actin filaments can form the so-called microspikes, which are about 0.1 um wide and 5 to 10 um long and contain a loose bundle of about 20 actin filaments oriented with their plus ends pointing outward. In conclusion, it will be a good idea to look at the actin protein in order to make a research in amoeba's locomotion processes.
Which of the following become connected by myosin cross-bridges during muscle contraction A) thin filaments and thick filaments B) thin filaments and t-tubules C) thick filaments and titin filame?
Interactions between actin and myosin filaments of the sarcomere are responsible for muscle contractions. The I bands contain only thin (actin) filaments, whereas the A bands contain thick (myosin) filaments.
What are the names of protein filaments in a muscle fiber?
Actin Filaments
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.
What are the filaments of a dynamic skeleton?
Actin filaments
What would enable you to identify the plus end of actin filaments?
add radiolabeled actin subunits to a mixture of actin filaments in which conditions are favorable for polymerization.
Do actin filaments have membranes?
No. They are polymers of actin that form 'filaments'. Membranes in eukaryotic cells are composed of a 'lipid bilayer'
What do actin filaments support?
the cytoskeleton
The thick filaments of muscle fibers are composed of what?
Myosin
What are actin and myosin and are they organized iin a muscle?
Thick filaments are made of the protein myosin and thin filaments are made of the protein actin. Myosin and actin filaments are arranged to form and overlapping pattern which gives muscle tissue its striated appearance.
Do myosin filaments outnumber actin filaments in skeletal muscles?
No. 2 to active
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.
Contratile elements of the cytoskeleton?
Actin filaments
Where are actin filaments only located?
in the A band
