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The Muscular System

QuestionAnswer
what are the 3 types of muscle? Cardiac, Smooth and Skeletal
what muscle is only found in the heart? cardiac
Is the cardiac muscle voluntary or involuntary? voluntary
what involuntary muscle is found in the digestive tract? smooth muscle
what voluntary muscle causes body movement? skeletal
what is the skeletal muscle made of? muscle fiber
what is the layer of connective tissue that surrounds the muscle as a whole and binds all the muscle fibers? epimysium
what attaches to the bone by tendons? muscle
what are tendons made of? strong cords of fibrous connective tissue
what is myofibril? long protein bundles that fill the sarcoplasm
what 2 things does myofibril store? glycogen and oxygen
what stacks together to form the myofibrils? thin myofilaments and thick myofilaments
ATP and calcium are required to do what? contract the muscle
what does the skeletal muscle require for contraction? stimulation by a motor neuron
what is muscle tone? a continuous state of partial muscle contraction in which muscles are at their optimal resting state.
what is a motor unit? a neuron and all the fibers it stimulates
what is the minimum voltage needed to cause muscle fiber contractions? threshold
what is the force of a muscle contraction affected by? size of the muscle, degree of stretch, and number of muscle fibers contracting.
what is the condition of rapid contraction with only partial relaxation? incomplete tetanus
what is the meaning of anaerobic? without oxygen
what type of respiration can generate energy quickly to use for intense bursts of activity? anaerobic respiration
what is the main muscle triggering movement? prime mover
the muscles that assist are called? synergists
the muscles balancing the movements of the prime mover and synergists is? antagonists
when a lack of use causes the muscle fibers and the entire muscle to shrink is? atrophy
define bi? 2 origins
what muscle that raises the eyebrow when glancing upward? frontalis
what muscle that flexes the head? sternocleidomastoid
what elevates the ribs during respiration? external intercostals
what depresses the ribs during forced exhalation? internal intercostals
what enlarges the thorax to trigger inspiration? diaphragm
what are the 3 muscles used for breathing? external intercostals, internal intercostals, and diaphragm
what flexes the lumbar region of the spinal column to cause bending forward at the waist? rectus abdominis
what ABDUCTS, flexes, and rotates the arm? deltoid
what flexes and ADDUCTS the upper arm? pectoralis major
what stabilizes the scapula during arm movements? trapezius
what is the bulging calf muscle? gastrocnemius
what is the most powerful muscle in the body? quadriceps femoris
what is the prime mover when extending the forearm? triceps brachii
what is the muscle that extends the upper arm backward? latissimus doris
what lies superficially between the ribs and elevates the ribs during inspiration? external intercostals
what is the longest muscle in the body and aids in the function of the hip and knee? sartorius
what muscle flexes the thigh? Iliopsoas
Created by: sophia7