Review properties of isotonic twitches and the load-velocity relation of skeleta

Question

Review properties of isotonic twitches and the load-velocity relation of skeletal muscle fibers. Imagine that you stimulate a single skeletal muscle fiber with a maximum tetanic stimulus, vary the size of the load it lifts, and allow it to shorten isotonically. no The slowest contractions would occur at the loads. heaviest The fastest contractions would occur at the loads. slower The shortening velocity is maximal when there is load sotonic The shortening velocity is zero when the load is equal to the maxima tension longer At heavier loads, the latent period is shorter At heavier loads, the velocity of shortening (distance shorted per unit time) is farther At heavier loads, the duration of the movement of the load is isometric At lighter loads, the distance shortened is ightest

Explanation / Answer

The slowest contraction occur at the heaviest loads

The fastest contraction occur at the lightest loads

The shortening velocity is maximal when there is no load

The shortening velocity is zero when the load is equal to the maximal isometric tension

At heavier loads the latent period is longer

At heavier loads the velocity of shortening (distance shorted per unit time) is slower

At heavier loads the duration of the movement of the load is shorter

At lighter loads, the distance shortened is farther

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