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the release of this element plays a key role in muscle contraction - correct answer-
calcium
a sarcomere is the area - correct answer-between 2 z lines
the hip and shoulder joints are examples of which type joint - correct answer-ball and
socket
the lambdoidal suture is located between what 2 cranial bones - correct answer-occipital
and parietal
in a fully contracted muscle the sarcomere is the length of the - correct answer-A band
which of the following is not required for muscle contractin - correct answer-
acetylcholinesterase
the ___ of skeletal muscle fiber is the cell's plasma membrane - correct answer-
sarcolemma
which layer of connective tissue covers a fascicle - correct answer-perimysium
a single stimulus that gives one rapid contraction - correct answer-twitch
the control center for the entire body which includes the brain and spinal cord - correct
answer-central nervous system
, nerves which convey impulses from the periphery to the spinal cord - correct answer-
afferent
cells which supply support and protection to the CNS - correct answer-neuroglia
bundles of myelinated neuronal processes in the CNS are - correct answer-tracts
neurons with several dendrites and one axon would be classified by structure as -
correct answer-multipolar
these fibers conduct nerve impulses from the CNS to smooth muscles, cardiac muscle,
glands, and skeletal muscle - correct answer-efferent
an action potential is generated when a threshold signal reaches the - correct answer-
axon hillock
neurons that conduct impulses from the CNS to skeletal muscle are part of which
nervous system - correct answer-somatic
cells which are excitable and highly specialized for conduction of nerve impulses are -
correct answer-neurons
action potentials are conducted more rapidly when - correct answer-the axon is
myelinated
the action potential can jump at the ____ on the myelinated axon in saltatory conduction
- correct answer-nodes of rnavier
these supporting cells in the CNS form the myelin sheath - correct answer-
oligodendrocytes
the supporting cells that line the ventricles and aid in circulation of cerebrospinal fluid -
correct answer-ependymal cells