muscle cells, unique junctions called intercalated discs (gap junctions) link the cells together and define their borders. Intercalated discs are the major portal for cardiac cell-to-cell communication, which is required for coordinated muscle contraction and maintenance of circulation.

What is the meaning of intercalated disc?

Medical Definition of intercalated disk: any of the specialized regions of the sarcolemma and underlying cytoplasm of cardiac muscle cells that comprise the longitudinal and end-to-end junctions between adjacent cells and that function to connect them mechanically and electrically.

What exactly is an intercalated disc what do they contain?

Intercalated discs are part of the sarcolemma and contain two structures important in cardiac muscle contraction: gap junctions and desmosomes. A gap junction forms channels between adjacent cardiac muscle fibers that allow the depolarizing current produced by cations to flow from one cardiac muscle cell to the next.

What are intercalated discs Class 9?

Intercalated discs are specialised regions of cell membrane of two adjacent fibres. The intercalated dics function as a booster of contraction wave and permit the wave of muscle contraction to be transmitted from one cardiac fibre to other.

What is intercalated discs of cardiac muscle?

Intercalated discs are part of the cardiac muscle sarcolemma, so they also contain gap junctions for depolarization between muscle fibers and desmosomes that hold the fibers together during cardiac muscle contraction (Fig. 3b).

What is the function of intercalated discs in the heart?

muscle cells, unique junctions called intercalated discs (gap junctions) link the cells together and define their borders. Intercalated discs are the major portal for cardiac cell-to-cell communication, which is required for coordinated muscle contraction and maintenance of circulation.

What is the function of intercalated discs quizlet?

The intercalated discs enable the muscle cells to synchronize during contraction.

What are the two functions of the intercalated disc?

Intercalated discs are unique structural formations found between the myocardial cells of the heart. They play vital roles in bonding cardiac muscle cells together and in transmitting signals between cells.

What is the benefit of intercalated discs?

An intercalated disc allows the cardiac muscle cells to contract in a wave-like pattern so that the heart can work as a pump.

What is Autorhythmicity Why is the significance of this for heart function?

Heart is a hollow, muscular organ responsible for maintainance of blood flow. It accomplishes that function by being able not only to contract, but to do it without the need of any external stimulus- has autorhythmical capacity.

What is actin and myosin?

Actin and myosin are both proteins that are found in every type of muscle tissue. Thick myosin filaments and thin actin filaments work together to generate muscle contractions and movement. Myosin is a type of molecular motor and converts chemical energy released from ATP into mechanical energy.

What is intercalated disc Class 11?

Hint: Intercalated disks are double membranes that are undulating and are known to hold two cells together by desmosomes and connect them through gap junctions, thereby allowing the conduction of electrical impulse from one cell to the other.

What is oblique bridge in cardiac muscle?

Oblique bridge present between cardiac muscle fibre so these fibre are branched. Intercalated disc present between cardiac muscle fibre. Wave of contraction goes one muscle fibre to another muscle fibre by intercalated disc. It makes wave of contraction more prominant so this disc called booster ring.

What is the function of intercalated discs What did the intercalated discs look like on the slide?

What did the intercalated discs look like on the slide? Cardiac muscle contains sarcomeres, which in themselves contain myofibril proteins, as well as actin and myosin filaments. Cardiac contractile cells have intercalated discs that permit ions to pass between the cells, which transmits the electrical impulse rapidly.

What is muscular tissue and its function?

Muscle tissue is composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts. The tissue is highly cellular and is well supplied with blood vessels.

What is the function of cardiac muscle tissue?

Cardiac muscle tissue is a specialized, organized type of tissue that only exists in the heart. It is responsible for keeping the heart pumping and blood circulating around the body. Cardiac muscle tissue, or myocardium, contains cells that expand and contract in response to electrical impulses from the nervous system.