Chapter 8 Muscle Test Practice Flashcards
When the sternocephalicus muscle contracts what happens in the animal’s body?
the head and neck are lowered
Which three muscles make up the hamstring muscle?
biceps femoris, semitendinosus, semimembranosus
The outermost connective tissue layer of a muscle is the
Epimysium (surrounds the entire muscle)
The two major sources of energy for normal muscle metabolism are
glucose and oxygen
Cardiac muscle is classified as
involuntary striated muscle
Smooth muscle is classified as
involuntary nonstriated muscle
What type of muscle controls the movement of an animal’s skeleton?
voluntary striated muscle
In muscle the source of a phosphate molecule needed to recharge an ADP molecule to an ATP molecule is
creatine phosphate.
The diaphragm is composed of
Voluntary striated muscle
Which motor unit would an animal most likely use to move its eyeball?
1 nerve fiber, 2 muscle fibers
The respiratory muscles that work together to increase the size of the thoracic cavity when they contract are the
diaphragm and external intercostal muscles.
The internal abdominal oblique muscle is partially named based on
the direction its fibers run
Another name for a skeletal muscle cell is a skeletal muscle
fiber
The linea alba is a/an
aponeurosis.
The “pacemaker” of the heart is the sinoatrial node located in the wall of the
right atrium
The average muscle fiber contraction cycle lasts about
0.1 second
What type of muscle controls the movement of an animal’s skeleton?
voluntary striated muscle
Stretching the wall of the small intestines will result in
increased force of visceral smooth muscle contraction
The muscle in an animal that corresponds to the calf muscle in humans is the
gastrocnemius muscle
When skeletal muscle contracts, which site undergoes the greatest movement?
insertion of the muscle
If the fibers of a muscle are running caudoventrally, in which direction are they running?
to the back of the animal and down
The parasympathetic nervous system has this overall effect on the heart.
It causes it to beat slower with less force.
Anaerobic muscle metabolism results in __ formation as a result of incomplete glucose metabolism.
lactic acid
The contracting unit of a skeletal muscle is the
sarcomere
The all-or-nothing principle of muscle physiology refers to
the contraction of a muscle
Which structure of a muscle contains adipose tissue that contributes to the grossly visible marbling of meat?
perimysium
Groups of cardiac muscle cells adapt their contraction rate to
the fastest cell
The triceps brachii muscle is partially named based on
its location
Which structures contain visceral smooth muscle?
stomach and urinary bladder
A skeletal muscle that contracts at the same time as the prime mover muscle and assists in carrying out the prime mover’s action is a/an
synergist
