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Muscle System Review

QuestionAnswer
Extension occurs when the fingers are bent to form a fist False
Fibromyalgia Chronic, widespread pain in specific muscle sites
When the muscles contract, they become longer and thinner False
Abduction Moving the arms out to the side
Adduction Moving a body part toward the middle
Extension Increasing the angle between two bones
Flexion Bending the lower arm up toward the upper arm
Striated, voluntary Skeletal muscle
Striated, involuntary Cardiac muscle
Several mitochondria Skeletal muscle
Non-striated, involuntary Smooth muscle
Heart muscle Cardiac muscle
Attached and supports bones Skeletal muscle
Makes up walls of hollow organs Smooth muscle
Fascia Dense tissue that surrounds each muscle
Acetylcholine Neurotransmitter that stimulates action potential
Motor Neuron Stimulates skeletal muscle
Eccentric Contraction that occurs when walking down stairs
Concentric Contraction that occurs when you complete a bicep curl
Sodium ions Muscles contract when these ions rush to cells
Potassium ions Muscles relax when these ions leave cell
Synapse Gap between neuron and muscle fiber
Sarcolemma Cell membrane of a muscle cell
Frontalis Muscle that raises eyebrows and wrinkles forehead
Tendon Connects muscle to bone
Strain Injuries due to overstretching of muscles or tendons
Sprain More serious injuries due to tears in the ligaments or cartilage in joints
Hernia Organ protrudes through muscle
Muscular Dystrophy Group of inherited diseases that leads to chronic progressive muscle atrophy; often leads to paralysis or death
Pectoralis major Muscle on upper chest that adducts and flexes the upper arm
Trapezius Muscle on upper back and neck that extends the head and moves the shoulder
Tibialis anterior Muscle on the front of lower leg that flexes and inverts the foot
Rectus abdominus Muscle that extends from the ribs to the pubis and compresses the abdomen
Quadriceps femoris Muscle on the front of thigh that extends the legs
Which two muscles are supported by the Achilles tendon Soleus and gastrocnemius
Biceps brachii Muscle on upper arm that extends the lower arm
Circumduction Moving a circle at a joint
Calcium ions Attached to troponin and tropomyosin filaments in order to allow an actin-myosin "cross bridge"
Zygomaticus Muscle closes, pursues, and protrudes the lips in a kissing action
Created by: erynfabro
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