Random Muscle Facts
Muscles always ________. They never _________.
pull, push
Bending movement that decreases the angle of the joint is:
Flexion
What is the membrane that covers the entire muscle?
epimysium
What muscle allows you to cross your legs?
Sartorius
What is the origin of a muscle?
The place where the muscle begins, also where the muscle contracts towards.
Muscle contraction in which there is no movement is called
Isometric
The movement in which you point your toes towards the sky.
dorsiflexion
In Myofibrils, the smallest fiber of muscle that contains actin and myosin filaments, what is another name for the contractile units?
Sarcomere
What portion of the muscle is attached to the immovable bone?
Origin
The insertion is the place where the muscle ______.
Attaches (ends) or the portion of the muscle that moves.
Muscle fatigue is believed to be caused by:
lack of oxygen and build-up of lactic acid
The movement commonly seen at a ball-and-socket joint is
circumduction
Explain the sliding filament theory.
What disease is characterized by a lack of protein protecting the sarcolemma?
Duchenne Muscular Dystrophy
rectus femoris and 3 vastus muscles
Name 3 categories for naming muscles
size, shape, number of origins, action
In the contraction of a muscle, what is the name of the process?
Sliding Filament Theory
What muscle allows you to bow your head?
Sternocleidomastoid
What muscle is your 6 pack?
rectus abdominis
The smallest component of muscles are called
myofilaments
What is the difference between inversion and eversion?
Inversion is related to feet, the movement of the sole towards the median plane. Eversion, also is related to the feet, the movement of the sole goes away from the median plane.
What is muscle tone?
What is the insertion of the biceps brachii
Radius
What are the 4 functions of the muscular system?
Producing movement, maintaining posture, stabilizing joints, and maintaining heat.