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An ______is a muscle that opposes a particular movement.

Correctly relate the story of contraction events in order in a muscle fiber by numbering each event below. 1.  Troponin changes shape. 2.  Calcium ions bind to troponin. 3.  Myosin heads bind to active sites on actin molecules. 4.  Tropomyosin moves and exposes the active sites on the actin molecules. 5.   Cycling continues until calcium ions are taken back into the sarcoplasmic reticulum. 6.   Myosin heads pull on thin myofilaments and slide them toward the center of the sarcomere.

Slow oxidative fibers are fatigue-resistant because of their slow speed of contraction and their dependence on oxygen delivery and are best for

Which of the following is the correct sequence to describe the steps in muscle contraction? 1.  tropomyosin blockage is restored with the removal of the calcium and the contraction ends 2.  myosin heads attach to actin and detach pulling the actin filaments toward the center of the sarcomere 3.  calcium ions bind to troponin which changes shape, removing the blocking action of the tropomyosin 4.  nerve impulse reaches the end of an axon and ACh is released and diffuses across the synaptic cleft to attach to ACh receptors on the sarcolemma of the muscle fiber 5.  action potential travels along the sarcolemma and down the T tubule into the interior of a muscle fiber triggering calcum ion release from the sarcoplasmic reticulum

Considering the muscle, temporalis, this is naming muscle according to

What is the connective tissue sheath that surrounds each fascicle bundle?

This type of muscle tissue is striated and involuntary and contracts at a steady rate and is found in an organ that is found in the cardiovascular system.

Considering the muscle, gluteus maximus, this is naming muscle according to

Oxygen debt is repaid by deep breathing, having been triggered by high levels of what in the blood?

    The illustration above is an example of a