Does the energy associated with the mechanical work performed by a contracting muscle fiber (cell)derive from the stored potential energy of ionic gradients, or from some other source? Please explain.
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Does the energy associated with the mechanical work performed by a contracting muscle fiber (cell)derive from...
A. Derive an equation from first principles that shows how the maximum non-expansion work in a reversible isothermal-isobaric process depends on Gibbs free energy and hence chemical potential B. Using you derivation, show how the standard potential of an electrochemical reaction relates to the change in Gibbs free energy and the work done by the system 10P 2. A. Define both chemical potential and activity coefficient. B. Explain why it necessary to use activity coefficients when discussing ionic solutions? Within...
what is the energy source used for muscle contraction? how does recruitment of motor units work? do all muscle fibers in a motor unit contract every time the somatic motor neuron stimulates it?
Work and Energy Worksheet Systems Total Energy Kinetic Energy Potential Energy Place these words in the correct column. Give an example in the human body of each of these types of work: Carbohydrates • Mechanical work Fats . Chemical work Protein . Transport work ATP Phosphocreotine (PC) Heat Muscle contraction (mechanical work) Chemical work Work and Energy Worksheet Match the term on the left with the best definition on the right. A. oxygen requiring energy reactions Metabolism Bis the amount...
Resources Ex Give ignment Score: 54.4% tion 21 of 25 > Which substances contain, or are examples of, lipids? enzyme DNA O cell wall cell membrane beeswax testosterone Question 7 of 30 When a muscle moves, a phosphate is removed from ATP. Breaking a bond in ATP allows the chemical energy stored in the bond to disperse in a muscle cell in the forms of mechanical energy and heat energy. How does the second law of thermodynamics apply to this...
1.The hyperbolic force dependence of muscle shortening velocity results from the fact that: a. Muscle contraction is best described by a Hookean Spring model. b. Energy is dissipated by mechanical work and viscous drag, both of which depend on changes in sarcomere length. c. ATPase cycling is hyperbolically dependent on the local concentration of Actin. d. Ftot = funi*D*N e. Heat liberation by muscle is constant.
(a) A muscle can be thought of as a fuel cell, producing work from the metabolism of glucose (C6H1206): C6H1206 (glucose) +202(9) + 2H2O(l) + CO2(g). (0.1) Here g and I refer to the gaseous and liquid states, respectively. Using data given in the table, please determine the values of AH and AG for this reaction for one mole of glucose, assuming that the reaction takes place at room temperature and atmospheric pressure. Substance CH 20. (glucose) 0 (9) H200...
Neuron Signaling and Muscle Contraction 1) “Dissect” the various parts of an action potential by describing the status (active or nonactive) of the voltage-gated sodium channel, voltage-gated potassium channel, sodium/potassium pump, and overall voltage and/ or voltage range (in millivolts, or mV) for each of the following. A) Resting membrane (prior to the initiation of an action potential) B) just before threshold to just after threshold (Depolarization) C) Rising phase of the action potential D) Falling phase of the action...
thermal physics question
A muscle can be thought of as a fuel cell that produces work from the metabolism of glucose CeH1206 602-6C02 6H20 Relevant data on the reactants and products are tabulated below: H (kJ/mol) -1273 0 | Δ/G (kJ/mol) -910 0 -394.4 237.1 | Glucose O2 (g) CO2 (g393.5 H2O (1) S (J/Knol) 212 205 214 70 -285.8 5. Assuming ideal operation at room temperature, how much work could your muscles 6. Still assuming ideal operation, will heat...
In addition to glucose, a muscle can also use as second source of energy for sustained exercise? Which of the following is NOT true of action potential frequency? Creatine phosphate in the muscle is used to Select one: O a. Regenerate ATP from ADP b. Breakdown of glucose to make Select one: O a. Creatine phosphate O b. Fatty acids O c. insulin ATP Select one: O a. A subthreshold stimulus will not produce an action potential O b. A...
Thermal question
A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work, and that essentially all the work goes into the vertical climb. (a) (3 marks) With reference to the data above, how many servings of Nutrigrain should she eat to provide enough energy for the climb? (b) (6 marks) Climbing a mountain warms you up, and makes you sweat one...