Exercise 2 skeletal muscle physiology worksheet

What happened in the isolated skeletal muscle when the maximal voltage was applied?

Physioex exercise 2 activity 2

At the threshold stimulus, do sodium ions start to move into or out of the cell to bring about the membrane depolarization? Maximal active tension will be produced in a skeletal muscle fiber when You correctly answered: a. Is the total muscle force generated by the higher frequency stimulation greater than the force generated in previous stimulations? When the stimulus frequency reaches a value beyond which no further increase of skeletal muscle force can occur, the muscle has reached its You correctly answered: c. Describe the process of excitation-contraction coupling in skeletal muscle fibers. Which of the following distinguishes a state of unfused tetanus from a state of complete fused tetanus? Which of the following is not thought to be a contributing factor to the development of fatigue? Skeletal muscle fibers are innervated stimulated by You correctly answered: c. Specifically, what happened to the muscle force generated with stronger electrical stimulations and why did this change occur? Which of the following correctly matches the twitch phase with its definition?

The graded depolarization in the skeletal muscle fiber that is elicited in response to one action potential from the motor neuron is called You correctly answered: c. How well did the results compare with your prediction?

describe the process of excitation-contraction coupling in skeletal muscle fibers

During the latent period for an isometric contraction You correctly answered: c. Mi respuesta estaba mal.

physioex exercise 2 activity 3

You correctly answered: d. Describe the force of contraction with each subsequent stimulus. When skeletal muscle twitches fuse so that the peaks and valleys of each twitch become indistinguishable from each other, the muscle is in a state known as You correctly answered: d.

Three phases of skeletal muscle twitch

Your answer: se genera fuerza pasiva apartir de la longuitud 80, a medida que aumenta la longuitud aumenta la fuerza pasiva menorr a Which of the following is not thought to be a contributing factor to the development of fatigue? Describe the process of excitation-contraction coupling in skeletal muscle fibers. Your answer: By turning the stimulator off, a period of rest is created; thus allowing the concentrations of intercellular concentrations of Lactic Acid, ADP, and Pi to decrease. Your answer: si el peso aumentar a 2. Which protein is mostly responsible for the development of passive force in a muscle? How did the frequency of stimulation affect the amount of force generated by the isolated skeletal muscle when the frequency of stimulation was increased such that the muscle twitches did not fully relax between subsequent stimuli? Your answer: la acetilcolina es el neurotransmisor que abre los canales que permiten el paso de Sodio y Potasio. Which of the following distinguishes a state of unfused tetanus from a state of complete fused tetanus? Your answer: La acetilcolina es un neurotransmisor que produce la despolarizacioni del musculo. Which of the following is not thought to be a contributing factor to the development of fatigue? In this experiment you observed the effect of stimulating the isolated skeletal muscle multiple times in a short period with complete relaxation between the stimuli.

Your answer: la sumacion y el reclutamiento de unidades motoras -son similares en que en ambas aumentan la fuerza del musculo, pero estas difieren en : 1.

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2: Skeletal Muscle Physiology