cross bridge formation
"Excitation-contraction coupling" connects muscle fiber excitation to the muscle fiber contraction (cross bridge formation). During contraction, myosin heads form cross bridges many times-with each cross bridge generating a small amount of tension in the muscle fiber.
T-tubules in cardiac muscle help transmit electrical signals deep into the muscle cells, allowing for synchronized contraction of the heart muscle. This process, known as excitation-contraction coupling, ensures that the heart beats effectively and efficiently.
Excitation coupling is the process by which an action potential in a muscle cell triggers the release of calcium ions from the sarcoplasmic reticulum, leading to muscle contraction. The steps of excitation coupling in muscle cells involve depolarization of the cell membrane, activation of voltage-gated calcium channels, release of calcium ions from the sarcoplasmic reticulum, and activation of the contractile proteins within the muscle cell.
Excitation-contraction coupling requires calcium ions to trigger the release of calcium from the sarcoplasmic reticulum in muscle cells, leading to muscle contraction. It also involves the action of proteins like troponin and tropomyosin to regulate the interaction between actin and myosin filaments.
The first phase after a stimulus in a muscle contraction is excitation-contraction coupling. This involves the transmission of the action potential along the sarcolemma and the release of calcium ions from the sarcoplasmic reticulum.
The muscular system coordinates the contraction of the whole muscle through a process called excitation-contraction coupling. When a signal from the nervous system reaches a muscle fiber, it triggers the release of calcium ions, which bind to proteins in the muscle cells and initiate the contraction process. This coordinated effort allows the entire muscle to contract in a synchronized manner, enabling movement and strength.
means by which electrical excitation of a muscle results in muscle contraction
T-tubules in cardiac muscle help transmit electrical signals deep into the muscle cells, allowing for synchronized contraction of the heart muscle. This process, known as excitation-contraction coupling, ensures that the heart beats effectively and efficiently.
Ca2+ and ATP
Tonus (relaxation), Excitation (neural stimulation, Clonus (contraction), Tetanus (prolonged contraction), return to Tonus (relaxation) Or Excitation, Excitation-Contraction Coupling, Contraction, Relaxation
cross bridge formation "Excitation-contraction coupling" connects muscle fiber excitation to the muscle fiber contraction (cross bridge formation). During contraction, myosin heads form cross bridges many times-with each cross bridge generating a small amount of tension in the muscle fiber.
Propagation of the action potential along the sarcolemma
the Ca++ ion
Latent period; Delay This is the time required for excitation, excitation-contraction coupling, and tensing of the elastic components of the muscle Chapter 11 Anatomy & Physiology "The Unity of Form and Function" 5th Edition Saladin
calcium release and binding to troponin molecules
cross bridge formation "Excitation-contraction coupling" connects muscle fiber excitation to the muscle fiber contraction (cross bridge formation). During contraction, myosin heads form cross bridges many times-with each cross bridge generating a small amount of tension in the muscle fiber.
Excitation coupling is the process by which an action potential in a muscle cell triggers the release of calcium ions from the sarcoplasmic reticulum, leading to muscle contraction. The steps of excitation coupling in muscle cells involve depolarization of the cell membrane, activation of voltage-gated calcium channels, release of calcium ions from the sarcoplasmic reticulum, and activation of the contractile proteins within the muscle cell.
ca2+ and atp