0
What else can I help you with?
Excitation-contraction coupling refers especially to the means by which do what?
means by which electrical excitation of a muscle results in muscle contraction
What are the 4 stages of a muscle cell?
Tonus (relaxation), Excitation (neural stimulation, Clonus (contraction), Tetanus (prolonged contraction), return to Tonus (relaxation) Or Excitation, Excitation-Contraction Coupling, Contraction, Relaxation
What best describes the events of excitation in excitation-contraction coupling?
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.
What substance couples electrical excitation to muscle contraction?
Ca2+
When does excitation-contraction coupling occur?
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
How do t-tubules contribute to the excitation-contraction coupling process in cardiac muscle?
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.
What is the process of excitation contraction coupling?
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.
What describes the events of contraction in excitation-contraction coupling?
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.
What are the three stages of muscle cell contraction?
A Muscle Twitch is a single contraction of skeletal muscle. The three distinct phases are latent, contraction, and relaxation. Latent Phase: Is the interval from the stimulus application until the muscle begins to contract (shorten). Note that there is no traced activity during this phase, but there are some electrical and chemical changes taking place during this phase. Contraction Phase: This phase is when the muscle fibers shorten, the tracings will show during this phase (a) peak(s). Relaxation Phase: This phase is represented by the downward curve in your tracings, this is when the muscle is going back to its original state of relaxation and the muscle will once again lengthen
What does the depolarization of the traverse tubules promote?
The depolarization of the transverse (T) tubules promotes the release of calcium ions from the sarcoplasmic reticulum into the cytosol of muscle fibers. This calcium release is crucial for muscle contraction, as it facilitates the interaction between actin and myosin filaments. Additionally, the depolarization triggers the excitation-contraction coupling process, enabling muscle fibers to respond to nerve impulses effectively.
What are muscle events?
Muscle events refer to the various physiological processes and activities associated with muscle contraction and relaxation. These events include the excitation of muscle fibers by nerve impulses, the release of calcium ions from the sarcoplasmic reticulum, and the interaction of actin and myosin filaments, which leads to muscle shortening. Additionally, muscle events encompass the metabolic activities that provide the energy required for contraction, such as ATP production. Overall, these coordinated processes enable movement and stability in the body.
What substance does excitation-contraction coupling require?
ca2+ and atp
