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_( (Botulinum toxin; Curare; Nerve gas organophosphate; Tetanus toxin) paralyzes skeletal muscle in its contracted state by inactivating acetylcholinesterase.(Calmodulin; Tropomyosin; Titin; Troponin) is the calcium-binding regulatory protein used in skeletalmuscle.Because a skeletal muscle fiber’s action potential is (much shorter; similar; much longer) in duration compared to its mechanical contraction/relaxation cycle,the effects of multiple, rapidly applied stimulations can summate, leading to unfused or fused tetany.Compared to a skeletal muscle fiber contracting under a light load, one contracting under a heavy load would exhibit a (longer; similar; shorter) latent period, a (faster; similar; slower) shortening velocity), and reach a (lower; similar; higher) maximal shorteningdistance.DHP proteins in skeletalmuscle function as (ligand-gated ryanodine channels in the sarcoplasmic reticulum membrane; mechanically-gated ryanodine channels in the sarcoplasmic reticulummembrane; L-type voltage-gated channels in the plasma membrane; voltage sensors in the T-tubules).The change in membrane potential that occurs at the motor end platein skeletal muscle in response to binding of the neurotransmitter released by an innervating somatic motor neuron is a/an (action potential; excitatory post-synaptic potential or EPSP; inhibitory post-synaptic potential or IPSP).The neurotransmitter released by the somatic motor neuron innervating a skeletal muscle fiber is (always acetylcholine; always norepinephrine; usually acetylcholine but occasionally and atypically norepinephrine; usually norepinephrine but occasionally and atypically acetylcholine).Voltage-gated sodiumchannels needed for action potential generation in skeletal muscle fibers are found in abundance __ (everywherein the sacrolemma; everywhere exceptin the motor end plateof the sarcolemma; nowherein the sarcolemma; only in the motor end plateregion of the sarcolemma)of the muscle fiber.)

          _(________ (Botulinum toxin; Curare; Nerve gas organophosphate; Tetanus toxin) paralyzes skeletal muscle in its contracted state by inactivating acetylcholinesterase.__________(Calmodulin; Tropomyosin; Titin; Troponin) is the calcium-binding regulatory protein used in skeletalmuscle.Because a skeletal muscle fiber’s action potential is __________ (much shorter; similar; much longer) in duration compared to its mechanical contraction/relaxation cycle,the effects of multiple, rapidly applied stimulations can summate, leading to unfused or fused tetany.Compared to a skeletal muscle fiber contracting under a light load, one contracting under a heavy load would exhibit a __________ (longer; similar; shorter) latent period, a __________ (faster; similar; slower) shortening velocity), and reach a __________ (lower; similar; higher) maximal shorteningdistance.DHP proteins in skeletalmuscle function as __________ (ligand-gated ryanodine channels in the sarcoplasmic reticulum membrane; mechanically-gated ryanodine channels in the sarcoplasmic reticulummembrane; L-type voltage-gated channels in the plasma membrane; voltage sensors in the T-tubules).The change in membrane potential that occurs at the motor end platein skeletal muscle in response to binding of the neurotransmitter released by an innervating somatic motor neuron is a/an __________ (action potential; excitatory post-synaptic potential or EPSP; inhibitory post-synaptic potential or IPSP).The neurotransmitter released by the somatic motor neuron innervating a skeletal muscle fiber is __________ (always acetylcholine; always norepinephrine; usually acetylcholine but occasionally and atypically norepinephrine; usually norepinephrine but occasionally and atypically acetylcholine).Voltage-gated sodiumchannels needed for action potential generation in skeletal muscle fibers are found in abundance __________ (everywherein the sacrolemma; everywhere exceptin the motor end plateof the sarcolemma; nowherein the sarcolemma; only in the motor end plateregion of the sarcolemma)of the muscle fiber.)

Added by Ernest G.

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