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| ____ neuron axons innervate several muscle cells within a muscle. |
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| When repeated stimulation occurs with out a relaxation time, the muscle is maintained in a state of contraction called ____. |
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| Tetanus occurs when we experience muscle ____ and spasms. |
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| During strenuous activity, a great number of motor units are called to contract, a process known as ____ ____. |
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| The body stores carbohydrates in its muscles in the form of a starch called ____. When muscles function, they use the stored inventory, changing it to glucose, as the source of energy. |
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| Muscle fiber, and therefore the muscle, ____ (grows larger) with exercise; the number of fibers does not increase, however. |
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| With ____, the connective tissue increases, as do the elastic fibers. |
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| ____ muscles are attached to bones and therefore permit movement. |
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| ____ muscle tissue is made of small, delicate muscle cells and is found throughout the internal organs of the body, except for the heart. |
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| The third type of muscle tissue is ____ muscle tissue, and is only found in the heart. |
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| When one cell receives a signal to contract, all neighboring cells are ____ and they contract together to produce the action of the heartbeat. |
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| When muscles ____, they become shorter and thicker. |
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| The skeletal muscle that bends at a joint is called a ____, whereas the action of straightening the joint is done by the ____. |
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| The flexor and extensor are considered a ____ team. The purpose of this is to bend and straighten the joints. |
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| The constant state of contraction is known as _____ ____. |
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| Another muscular condition that develops from lack of use is called ____. Here, flexor muscles become shorter and permanently bend the joints. |
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| Some muscular connective tissue sheaths extend to form a strong fibrous structure known as a ____, which are attached to rough surfaces on a bone. |
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| The thickest and strongest tendon in the human body is the ____ ____, which attached the gastrocnemius muscle in the calf of the leg to the heel bone. |
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| When skeletal muscles join bones that meet at joints, one of the bones becomes the ____ on which the muscle has its origin. The bone to be moved becomes the ____ end for the muscle. |
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| The muscle most important in breathing divides the chest cavity from the abdominal cavity. This muscle is called the ____. |
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| When the diaphragm ____, is becomes shorter and therefore flatter, creating a vaccuum that causes the lungs to draw in air. When the muscle relaxes, it returns to it's dome shape and forces air out of the lungs. |
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| Spasmodic contractions of the diapgragm, followed by spasmodic closure of the space between the vocal cords, cause the common ____. |
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| The ____ muscles lie beneath the pectoralis major, between the ribs. |
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| The abdomen is covered by three main muscle layers that run in different directions to make a strong wall to protect the ____. |
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| The shoulder are protected by a triangle of muscle called the ____, which abducts the arm. |
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| The buttocks are formed by the large ____ ____ muscles, which support much of the body's weight and enable us to stand erect. |
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| The ____ ____, with four separate parts (rectus formalis, vastus lateralis, vastus medialis, and vastus intermedius) makes up the bulk of the anterior thigh musculature. |
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| The posterior thigh is the site of the ____ group. |
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| The ____ is the main muscle in the calf of the leg. Its tendon, the Achilles, has been mentioned. |
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| The ____ ____ also allows us to whistle, kiss, smile, grin, grimace with pain, or pout. |
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| The ____ ____ around the eyes help complete the frown and enable us to squint or wink. |
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| The large muscle of the lower jaw is the ____, which enables us to chew. |
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| When too much stress is applied to skeletal muscles while exercising or participating in athletic activities, this can result in a ____. |
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| Vigorous exercise is believed to cause an _____ deficit. When this occurs, lactic acid begins to accumulate, the glycogen is depleted, and the muscle's supply of ATP runs low. |
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| The alternating action of both layers, contracting and relaxing, works the food through the body in a wavelike action called ____. |
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| Smooth, donut-shaped muscle structures called ____ control the flow of food, liquid, or blood. |
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| ____ is an inflammation of the bursa that covers and lubricates the muscles and tendons and occurs most often at the shoulder, elbow, or knee. It normally results in a sports-related activity that damages the muscle-tendon structure. |
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| ____ or tennis elbow, is an inflammation of a forearm tendon at the attachment on the humerus at the elbow. Pain is felt when an object is grasped or the elbow is twisted. |
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| ____ is a chronic musculoskeletal condition characterized by widespread pain. Diagnosis is considered positive when 11 out of 18 joints are painful. |
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| ____ ____ represents about 50% of all the cases of muscular dystrophy. Death usually occurs after 10 to 15 years of having the disease. |
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| ____, also known as wryneck, is a neck deformity that bends the head to the affected side and rotates the chin toward the opposite site side. It can be congenital or acquired. |
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