APK 2105C Study Guide - Midterm Guide: Sarcolemma, Oxidative Phosphorylation, Soleus Muscle
8 Dec 2016
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Golgi tendon organs: sense high and low levels of contraction and passive stretches; inhibit contraction of muscle, protective sensory high/low tension signal; transmit tension information from tendon to cns. Understand the load velocity curve and how different loads alter the rate of shortening. Isotonic is dynamic contraction with load, becomes isometric when too heavy load and muscle cannot overcome force. See chart on page 4 with star by it latent period before shortening (increases until plateau), beginning of plateau is shortening, which ends at end of plateau and decreases until another stimulus, and repeats. When longer latent period before shortening, higher load, less time can hold load, will become isometric. Understand all of the steps involved in excitation contraction coupling. Series of events that link end-plate potential to muscle contraction. 1: ach released from axon terminal of motor neuron, binds to receptors in motor end plate, elicits end plate potential that triggers ap in muscle cell.
