Upgrade to remove ads
Only $2.99/month

Exam 3

Terms in this set (59)

The molecule that stores oxygen in skeletal muscle is:
lactic acid
The neurotransmitter released at the neuromuscular junction
acetylcholine
An immovable joint found only between skull bones is called a:
suture
A movement which results in the arms being moved away from the body laterally is called:
abduction
Which of the following does not characterize a synovial joint?
a joint cavity filled with fibrous tissue
A slightly movable joint composed of a bar of cartilage:
symphysis
Articulations permitting only slight degrees of movement
Amphiarthroses
The rotator cuff is important in stabilizing this joint.
Shoulder
Three joints in one; capsule incomplete anteriorly.
Knee
A deep socket is most important stabilizing factor.
Hip
All muscle tissue has all the following properties except:
automaticity (pacemaker)
Which of the following is not a usual result of exercise?
increase in the number of muscle cells
In muscle contraction, calcium acts to:
initiate the formation of cross bridges.
An elaborate network of membranes in skeletal muscle cells that functions in calcium storage is the:
sarcoplasmic reticulum.
Creatine phosphate functions in the muscle cell by:
storing energy which will be transferred to ADP to make ATP as needed.
After nervous stimulation of the muscle cell has ceased, the calcium:
is removed from the cell or stored until the next contraction.
Which of the following is composed of myosin?
thick filaments
Muscle tone is:
a state of sustained partial contraction.
Which of these surrounds the individual muscle cell?
endomysium
Which of the following is not usually associated with a lever system?
synarthotic joint
Which of the following muscles acts in plantar flexion?
gastrocnemius
The muscle that is responsible for bringing about a particular movement.
prime mover
A muscle named 'biceps' is named for the
number of origins
An immovable fibrous joint in the skull is a
suture
The attachment of a muscle to the movable bone is the
Insertion
The phase of contraction that refers to the period of time when a muscle does not respond to a second stimulus is the
refractory
In which type of muscle tissue would you find dense bodies?
Smooth
The release of this element plays a key role in muscle contraction.
Calcium
A sarcomere is the area:
between two Z lines
The hip and shoulder joints are examples of which type joint?
ball-and-socket
The lambdoidal suture is located between what two cranial bones?
occipital, parietal
In a fully contracted muscle the sarcomere is the length of the
A band
Which of the following is not required for muscle contraction?
acetylcholinesterase
The of skeletal muscle fiber is the cell's plasma membrane.
Sarcolemma
Which layer of connective tissue covers a fascicle?
Perimysium
A single stimulus that gives one rapid contraction called a
Twitch
The control center for the entire body which includes the brain and the spinal cord is
central nervous system
Nerves which convey impulses from the periphery to the spinal cord are
afferent
Cells which supply support and protection to the central nervous system are called
neuroglia
Bundles of myelinated neuronal processes in the central nervous system are
tracts
Neurons with several dendrites and one axon would be classified by structure as
multipolar
These fibers conduct nerve impulses from the central nervous system to smooth muscle, cardiac muscle, glands, AND skeletal muscle:
efferent
An action potential is generated when a threshold signal reaches the
axon hillock
Neurons that conduct impulses from the central nervous system to skeletal muscle are part which nervous system?
somatic
Cells which are excitable and highly specialized for conduction of nerve impulses are
neurons
Action potentials are conducted more rapidly when
the axon is myelinated
The action potential can jump at the on the myelinated axon in saltatory conduction.
nodes of Ranvier
These supporting cells in the central nervous system form the myelin sheath.
oligodendroctyes
The supporting cells that line the ventricles and aid in circulation of cerebrospinal fluid:
ependymal cells
A bundle of fibers (axons or dendrites) in the peripheral nervous system are:
nerves
Restoring the membrane potential to the resting state is:
repolarization
The major ion that moves into the neuron with depolarization:
sodium
Groups of neuron cell bodies in the peripheral nervous system form
ganglia
A neurotransmitter is released at the synapse and generates a depolarization of the postsynaptic neuron. This is an
EPSP (excitatory postsynaptic potential)
The cell that is a special type of macrophage to remove foreign matter in the CNS is the:
microglia
Which of the following is true for mature neurons?
They do not undergo mitosis.
Which of the following is not considered a neurotransmitter?
caffeine
Integration occurs at the:
brain or spinal cord
A neurotransmitter that is inhibitory would cause the membrane to
hyperpolarize
YOU MIGHT ALSO LIKE...