Muscular system 1
Thin filaments are made of protein molecules called___
actin
Thick filaments are made up of_____-
myosin
The energy required for muscle contraction is obtained from_________
ATP
Production of energy with oxygen is called__________.
aerobic respiration
Muscles only______,they don't push.
pull
Wrapped in perimysium
Fascicles
Muscle cells are long fibers that run parralel to each other and are held together by?
Endomysium
Skeletal muscle is covered by a fourth tough layer of connective tissue called the________
Fascia
Muscles that work with prime movers by providing the opposing action is the _____________.
Antagonist
What muscle is named for its triangular shape?
Deltoid
Which muscle cells have more than one nucleus, are striated and are controlled voluntarily?
Skeletal
Contraction of these muscles in the neck causes flexion of the head toward the chest leading to the nickname "prayer muscle"
Sternocleidomastoid
The type of muscle found in the uterus, blood vessels, and urinary bladder is known as ____ muscle.
smooth
Stretching or tearing of the muscle or the tendon that connects muscle to bone.
Strain
The antagonist of the biceps brachii
triceps brachii
The contractile unit of a skeletal muscle, situated between the Z-lines is called
Sarcomere
The action potential traveling down the T tubule causes the sarcoplasmic reticulum to release ____ ions into the fluids surrounding the myofibrils.
Calcium
The biceps femoris, the semitendinosus, and the semimembranosus muscles are also known as the ____.
Inflammation of a tendon is called ____.
Tendonitis
The straight muscle in the middle of the quadriceps group is the
rectus femoris
What are 3 general functions of the muscular system
Movement
Heat Production
Posture
ATP may be made through a reaction between adenosine diphosphate and _________ which is stored in the muscles
creatine phosphate
If oxygen is not available to a muscle cell, pyruvic acid is changed to ____ and builds up in the muscle cell.
Lactic acid
Genetic disorder characterized by muscle wasting
muscular dystrophy
Autoimmune disease characterized by muscle weakness in face and throat
Myasthenia gravis