Actin, myosin
This description matches a structure called a myofibril, which is found in muscle cells. Myofibrils are made up of repeating units called sarcomeres that give them a banded appearance. They are responsible for muscle contractions by interacting with motor proteins.
Sarcomeres are the tiny contractile units linked together on a myofibril. They are the functional units of muscle tissue and are responsible for muscle contractions. Sarcomeres consist of thick and thin filaments made of proteins that slide past each other during muscle contraction.
The membranous network that surrounds each myofibril is known as the sarcoplasmic reticulum (SR). It plays a crucial role in muscle contraction by storing and releasing calcium ions, which are essential for initiating the contraction process. The SR is a specialized form of endoplasmic reticulum found in muscle cells, and it helps regulate calcium levels in the cytoplasm during muscle activity.
Z-lines separate one sarcomere from the next within a myofibril. These are structures composed of actin filaments where thin filaments from adjacent sarcomeres are anchored.
They are made up of mostly Chitin.
Myofibrils are made up of actin (thin filaments) and myosin (thick filaments).
Bundles of myofilaments make up
Actin , myosin and others .
This description matches a structure called a myofibril, which is found in muscle cells. Myofibrils are made up of repeating units called sarcomeres that give them a banded appearance. They are responsible for muscle contractions by interacting with motor proteins.
myofilament myofibril myofiber fascicle muscle
Myofibril
sacomeres are a single unit of a muscle fiber multiple sacomeres make up a myofibril
Myofilaments Two types: actin (thin filament) & myosin (thick filament)
Myofibril
myofibril
sarcomere
H band