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WorksheetsSaltatory Conduction and Muscle Properties Quiz
Total questions: 20
Worksheet time: 10mins
Saltatory conduction occurs in which nerve fibers?
Unmyelinated fibers
Myelinated fibers
Sensory fibers
Autonomic fibers
Saltatory conduction takes place at which structure?
Axon hillock
Schwann cell
Node of Ranvier
Neurilemma
Main advantage of saltatory conduction is?
Slow conduction
More energy consumption
Faster conduction
Continuous conduction
Which ion channel is responsible for absolute refractory period?
K+ channel
Ca2+ channel
Na+ channel
Cl- channel
During absolute refractory period nerve responds to?
Strong stimulus only
Weak stimulus only
Any stimulus
None
Relative refractory period is due to?
Na+ channel inactivation
Hyperpolarization
Depolarization
Resting membrane potential
Which muscle property refers to ability to shorten?
Excitability
Conductivity
Contractility
Elasticity
Ability of muscle to return to original length is?
Extensibility
Elasticity
Excitability
Contractility
Which muscle is involuntary and striated?
Skeletal
Cardiac
Smooth
Visceral
Smooth muscle lacks which feature?
Nucleus
Contractility
Striations
Elasticity
Skeletal muscle nucleus is?
Single central
Single peripheral
Multiple peripheral
Multiple central
Cardiac muscle fibers are connected by?
T tubules
Desmosomes
Intercalated discs
Sarcoplasmic reticulum
All-or-none law applies to?
Whole muscle
Fatigue
Single muscle fiber
Motor unit
All-or-none law means?
Graded response
Maximal response or none
Partial contraction
Fatigue response
Significance of all-or-none law?
Prevents fatigue
Ensures maximal response
Controls strength of contraction
Maintains tone
Motor unit consists of?
One muscle fiber and nerve
Motor neuron only
Motor neuron and muscle fibers
Muscle fibers only
Small motor units are involved in?
Gross movements
Powerful contractions
Fine movements
Posture
Recruitment of motor units increases?
Muscle fatigue
Strength of contraction
Refractory period
Latency
Motor end plate is?
Axon terminal
Muscle fiber membrane
NMJ specialized region
Synaptic vesicle
Miniature end plate potential is due to?
Nerve impulse release
Spontaneous ACh release
Action potential
K+ influx
