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Is the inner core of the Earth primarily composed of liquid or solid material?
The inner core of the Earth is primarily composed of solid material.
Which two rocks are primarily composed of a mineral that bubbles with acid?
The two rocks that are primarily composed of a mineral that bubbles with acid are limestone and marble.
Which layer of earth is composed primarily of solid iron?
The inner core is solid and composed mostly of iron.
Are bronze and steel metals?
Yes, bronze and steel are both metals. Bronze is an alloy primarily composed of copper and usually contains tin, while steel is an alloy that is primarily composed of iron and contains carbon.
What two rocks are primarily composed of a mineral that bubbles with acid?
Limestone and marble are primarily composed of calcite, a mineral that reacts with acid by producing bubbles. This reaction is commonly used to identify these rocks in the field.
Myofibrils are composed primarily of two protein filaments called?
thick filaments and thin filaments
What Primarily composes myofibrils?
Myofibrils are primarily composed of proteins called actin and myosin. These proteins are arranged in repeated units called sarcomeres, which are responsible for muscle contraction. Other proteins such as troponin and tropomyosin also play important roles in regulating muscle contraction.
Myofibrils are made primarily of what?
actin and myosin
What are the rod-like structures within the skeletal muscle fiber that contain thin and thick filaments organized into sarcomeres?
The rod-like structures within skeletal muscle fibers are known as myofibrils. These myofibrils are composed of repeating units called sarcomeres, which contain organized arrangements of thin filaments (primarily actin) and thick filaments (primarily myosin). The coordinated contraction of these sarcomeres results in muscle contraction. Myofibrils are essential for the overall function and strength of skeletal muscle tissue.
What is the smallest myfibril myofilament muscle fiber or fascicles?
The smallest unit among myofibrils, myofilaments, muscle fibers, and fascicles is the myofilament. Myofilaments are the microscopic protein filaments (actin and myosin) within myofibrils that are responsible for muscle contraction. Myofibrils are bundles of myofilaments, muscle fibers are composed of many myofibrils, and fascicles are groups of muscle fibers.
Which section goes into myofibrils organised along muscle fibers?
Myofibrils are composed of proteins such as actin, myosin, titin. These proteins are organized into thin filaments and thick filaments, which repeat along the length of the myofibril in sections called sarcomeres.
Do myofibrils contain many sarcomeres?
Yes, myofibrils contain numerous sarcomeres, which are the fundamental contractile units of muscle fibers. Each sarcomere is made up of interdigitating thick and thin filaments, primarily composed of myosin and actin, respectively. The arrangement of sarcomeres in series along the length of the myofibril allows for coordinated contraction and contributes to the overall striated appearance of skeletal and cardiac muscle.
What are Long threadlike structures found in muscle fibers?
Myofibrils are thread like structures found in muscle fiber composed of bundles of myofilaments.
The thick filaments of muscle fibers are composed of what?
Myosin
What makes up myofibrils?
Thin filaments consist primarily of the protein actin, coiled with nebulin filaments. Thick filaments consist primarily of the protein myosin, held in place by tit in filaments.
Is the mitotic spindle primarily composed of microtubules?
Yes, the mitotic spindle is primarily composed of microtubules.
What contains a sarcolemma sarcoplasm myofilaments and myofibrils?
A muscle fiber contains a sarcolemma, sarcoplasm, myofilaments, and myofibrils. The sarcolemma is the cell membrane that surrounds the muscle fiber, while the sarcoplasm is the cytoplasm of the muscle cell, containing various organelles and substrates for energy production. Myofilaments, which are composed of actin and myosin, are organized into myofibrils that facilitate muscle contraction. Together, these components enable the muscle fiber to function effectively during contraction and relaxation.
