Chapter 7 Test
Another name for smooth muscle...
Involuntary Muscle
When a muscle fiber is subjected to to a stimulus, it contracts completely, this is called...
All or None Law
This is a fluid-filled sac that acts as a lubricating structure for muscle movement.
Bursae
Intercalated discs are found in...
Cardiac Muscle
T/F A motor neuron and all the muscles it stimulates is called the neuromuscular junction.
False
T/F Dorsiflexion allows you to stand on your toes.
False
T/F In order for movement to take place, when the prime mover contracts, the synergist must relax.
False
T/F Prolonged inactivity can result in disuse hypertrophy.
False
T/F Since women have two X chromosomes, they are twice as likely to have duchenne muscular dystrophy.
False
T/F Smooth muscle is also called voluntary muscle.
False
T/F Strength training results in increase in total muscle cells.
False
T/F In order for the necessary cross bridges to form, potassium must be released from the endoplasmic reticulum.
False, Calcium
The muscle attachment to the more movable bone is called...
Insertion
The muscle contracts but does not shorten, but an increase of muscle tension occurs, this describes...
Isometric Contraction
The muscle contracts and shortens, and the insertion end moves toward the origin, this describes what type of contraction...
Isotonic Contraction
A single motor neuron with all the muscles it innervates is called...
Motor Unit
The thick myofilament of the skeletal muscles are made up of what protein.
Myosin
The point of contact between the nerve and the muscle fibers is called a...
Neuromuscular Junction
What happens to the muscles during endurance training?
Number of Blood Vessels Increase
What happens to the muscles during weight training?
Number of Myofilaments in each cell increase
The muscle attachment to the more stationary bone is called...
Origin
The movement opposite of dorsiflexion is...
Plantar Flexion
To produce a smooth muscle movement, what muscles contract, which relax?
Prime Mover contracts, and the Antagonist relaxes
Movement around a rotational axis is called...
Rotation
This refers to ankle and foot movement...
Rotation
The basic contractile unit of a skeletal muscle is the...
Sarcomere
When a muscle contraction occurs, what gets shorter?
Sarcomere
The connective tissue that attaches muscle to bone is called the...
Tendon
The minimal level of stimulation required to cause a muscle fiber to to contract is called...
Threshold Stimulus
T/F Cardiac muscle is found in the heart.
True
T/F In order for movement to occur, an antagonist must do the opposite of the prime mover.
True
T/F In the anatomical position, hands are supinated.
True
T/F Like skeletal muscles, cardiac muscles have intercalated discs.
True
T/F Skeletal muscle is also called striated muscle.
True
T/F Tendons anchor muscle to bone.
True
T/F Trying to lift a car (and failing) is an example of an isotonic contraction.
True
Poliomyelitis is...
Viral infection of motor nerves
Another name for skeletal muscle...
Voluntary Striated Muscle
Striations are found in...
Skeletal and Cardiac muscle
What allows you to lift different weights with the same muscle is the...
ATP
Moving a part away from the midline of the body is...
Abduction
The thin myofilament of the skeletal muscles are made up of what protein.
Actin
Moving a part toward the midline of the body is called...
Adduction
Myasthenia gravis is...
Autoimmune muscle disease characterized by weakness and chronic fatigue.
If an injury caused damage to the insertion of the biceps brachii, the injury would be nearest to the...
Bicep
What is the usual function of tonic contractions. What happens?
The muscle begins to contract