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Long Answer:Skeletal Muscle Hierarchy:Muscle Organ
Perimysium = white fibrous connective tissue & areolar connective tissue that surrounds each fascicle
Fascicle = bundle of skeletal muscle fibers
Endomysium = areolar connective tissue that surrounds each muscle fiber
Muscle Fiber ( Myofiber) = a muscle cell
Myofibrils = contractile protein organelles
Myofilaments = contractile proteins composed of:
thick filaments = made of myosin
thin filaments = made of actin
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∙ 14y ago
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What is one of the functional units of a myofibril?
sarcomere
What is the correct order of structures as you move from outside a muscle cell to deep inside it?
Fiber, Myofibril, Myofilament.
Is a cell or a molecule smaller?
Molecules are smaller. Sub atomic particles are even smaller
When you cry are your pupils smaller or bigger?
Smaller
What happens to the field of view when you change from low power magnification to high power magnification?
it will stay the same!!
What is the order from largest to smallest myofibril fascicle myofiber myofilament?
myofilament myofibril myofiber fascicle muscle
What is the Smaller fiber in a muscle fiber?
Myofibril
What is the term for a Smaller fiber in a muscle fiber?
The smaller fiber in a muscle fiber is called a myofibril. A band of tissue that connects bone to bone is called a ligament.
Why are myofibers polynucleated?
They're made from many of precursor cells fusing to form a myofiber cell, and each of these precursor cells has their own nucleus which are retained in the specalised myofiber cell.
What is the smallest contractile unit of the muscle fiber?
sarcomere
What another name for myocyte?
Myofibril
Myofibrils consist of contractile proteins called?
Myofilaments Two types: actin (thin filament) & myosin (thick filament)
What is a myofibril made up of?
Actin, myosin
What is the basic functional unit of a myofibril?
sarcomere
What is the fine subunit of muscle fiber?
myofibril
What area of a myofibril is there no actin filaments?
H band
What is a myofibril?
A myofibril is a bundle of contractile filaments (myofilaments), 1-2 μm in diameter, that are arranged in parallel groups in the cytoplasm of striated muscle cells.
