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S. Anat 7

Muscular System

Muscular system provides movement
Muscular system provides motility
Muscular system produces heat
Muscular system includes skeletal muscles
Muscle cells are specialized for contraction
Each muscle is made of thousands of muscle____ cells
Muscles cells (aka) muscle fibers
The brain recruits a _____number of fibers based on need higher
Anchors muscle to bone and other muscles tendon
Tendons are usually_____ round
Flat sheet like tendon Aponeurosis
Tendons are made of fibrous connective tissue
Tendons are a _____of deep fascia that cover muscle continuation
Tendons merge with _____to anchor to bone Periosteum
Where the muscle originate Origin
The origin is usually the more____of the 2 ends Stationary
The origin is usually the _____end Proximal
Opposite end or the origin Insertion
Insertion is usually across a ___from the origin joint
The primary muscle that brings desired movement Protagonist
Muscle that does the opposite of the desired movement Antagonist
Secondary muscles that bring about desired movement Synergist
Initiates the signal to the muscle in the premotor and motor areas of the cortex Frontal lobe
Coordinates movement cerebellum
Sensation of the muscles, conscious input parietal lobes
Subconscious input Cerebellum
Slight contraction of muscle that is present most of the time muscle tone
Muscle tone changes with____ position
Heat production from normal muscle metabolism Thermogenesis
Thermogenesis due to (2) Decomposition (chemical reaction), Friction
Muscle sense (aka) proprioception
Proprioception is the awareness of the position of ______thus the ____ Muscles, Joint
Muscle since is sensed by____receptors stretch
Stretch receptors detect changes in _____ length
Primary energy source ATP
Secondary energy source Creatine, phosphate& glycogen
The most abundant in energy source glycogen
When oxygen need is greater that the supply Oxygen debt
Breathing to supply the oxygen required by the liver to detoxify lactic acid Recover oxygen uptake
Motor nerves ending at the muscle fiber Neuromuscular junction
Enlarged end of the motor neuron motor end plate/axon terminal/synaptic knob
Axon terminal contains sacs of ____ acetylcholine (Ach)
Cell membrane of the muscle fiber Sarcolemma
Sarcolemma contains _____site for Ach receptor
Sarcolemma contains cholinesterase that_______Ach deactivates
The junction between the axon terminal and the muscle fiber Synapse
Contractile units in the muscle fiber Sarcomere
Actin (aka) thin filaments
Myosin (aka) thin filaments
Thicker contractile protein Myosin
Thick contractile protein that interacts with myosin actin
Protein backbone that anchors actin filaments Z line
Forms the end boundaries of the sarcomeres Z line
Protein that anchors myosin to Z line titan
Inhibitory proteins that prevent contraction when relaxed troponin, tropomyosis
ER of the cell membrane Sarcoplasmic reticulum
Reducing the angle of a joint flexion
Increasing the angle of a joint extension
Tilting the foot/ankle medially inversion
Tilting the foot/ankle laterally eversion
Rotating palm up (forward) supination
Rotating the palm down pronation
R&L side bending Lateral flexion
Rotating around a joint (R, L internal external) Rotation
Moving in a circular motion circumduction
Bring part away from midline abduction
Bring part toward midline aduction
Bring part toward the midline or posteriorly retraction
Bring a part away from the midline or anteriorly protraction
Head (chicken) (A, P, R, L) translation
Decreasing the angle of the ankle joint dorsiflexion
Increasing the angle of the ankle joint plantar flexion
Created by: Sarsileigh



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