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27 Cards in this Set

  • Front
  • Back
The thin myofilament of the skeletal muscles are made of:
actin
The thick myofilament of the skeletal muscles are made of:
myosin
The basic contractile unit of a skeletal muscle is the:
sarcomere
When a muscle contraction occurs:
the Z lines are pulled closer together
According to the sliding filament model, in order for a sarcomere to contract:
- bridges must form between the actin and myosin
- calcium must be released from the endoplasmic reticulum
- ATP must be broken down for energy
To produce smooth movement at a joint:
the prime mover and synergists must contract
The point of contract between the nerve and the muscle fibers it stimulates is called a:
neuromuscular junction
The minimal level of stimulation required to cause a fiber to contract is called:
a threshold stimulus
What allows you to lift different weights with the same muscle is the:
number of motor units used by the muscle
The muscle contracts and shortens and the insertion end moves toward the point of origin. This describes:
isotonic contractions
The muscle contracts but does not shorten, but an increase in muscle tension occurs. This describes:
isometric contractions
Endurance training leads to:
an increased number of blood vessels to the muscle
Which of the following muscles are muscles that move the upper extremities?
biceps brachii, triceps brachii, latissimus dorsi
Which of the following muscles are muscles that move the lower extremities?
sartorius, iliopsoas, gracilis
This refers to ankle and foot movement:
dorsiflexion
The movement that is opposite dorsiflexion is:
plantar flexion
Moving a part of the body away from the midline of the body is called:
abduction
This describes the hand position when the body is in anatomical position:
supination
Myasthenia gravis is:
an autoimmune disease
Duchenne muscular dystrophy is:
also called pseudohypertrophy
Poliomyelitis is:
caused by a viral infection
Intercalated disks are found in:
cardiac muscle
Another name for smooth muscle is:
visceral muscle
The muscle attachment to the more movable bone is called the:
insertion
The connective tissue that attaches muscle to bone is called:
tendon
If an injury caused damage to the insertion of the biceps brachii muscle (the anterior muscle of the upper arm), the injury would be nearest to:
the elbow
Striations are found in:
skeletal muscle and cardiac muscle