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Heart excitation nerve impulses that result in heart muscle contraction originates in?
Wiki User
∙ 14y ago
the pacemaker area or the sinoatrial node
Wiki User
∙ 14y ago
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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 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 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 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
What minerals are needed for muscle contraction and conduction of nerve impulses?
phosphorous.
When does contraction occurs?
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
Muscle contraction is triggered by impulses carried over what?
when ATP attaches to the myosin heah
What has the author Jozef Zachar written?
Jozef Zachar has written: 'Electrogenesis and contractility in skeletal muscle cells' -- subject- s -: Excitation - Physiology -, Muscle cells, Muscle contraction
Why does tetradotoxin lead to death?
It blocks the channel for sodium on the sceletal muscle and inhibits therefor the transmission of electrical impulses that are necessary for muscle contraction
