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WorksheetsExPhys Ch 3: Neural Control of Exercising Muscle
Total questions: 15
Worksheet time: 8mins
Which division of the nervous system is responsible for incoming signals?
Motor (efferent)
Sensory (afferent)
Central
Autonomic
Which system includes the brain and spinal cord?
Central nervous system
Peripheral nervous system
Autonomic nervous system
Somatic nervous system
Which part of the neuron is responsible for receiving signals?
Dendrites
Axon
Cell body
Nucleus
How many Na+ ions are moved for each 2 K+ ions by the Na+-K+ pump?
1
2
3
4
Which ion leaves the cell during hyperpolarization?
Na⁺
Cl⁻
K⁺
Ca²⁺
Which of the following is true about depolarization?
It makes the cell more negative.
It is not required for nerve impulses.
It involves Na⁺ entering the cell.
It involves K⁺ leaving the cell.
Which type of potential can help decide whether to pass a signal to the axon?
Graded potentials (GPs)
Action potentials (APs)
Resting potentials
Threshold potentials
What does an inhibitory signal cause in terms of ion movement?
Na⁺ influx
K⁺ efflux
Ca²⁺ influx
Cl⁻ influx
Which refractory period allows for the possibility of Na⁺ channels reopening?
Absolute refractory period
Relative refractory period
Both A and B
Neither A nor B
What is the primary ion movement during the relative refractory period?
Na⁺ influx
K⁺ efflux
Ca²⁺ influx
Cl⁻ influx
What are the gaps in the myelin sheath called?
Synaptic clefts
Nodes of Ranvier
Axon hillocks
Dendritic spines
What type of conduction occurs due to the presence of myelin?
Continuous conduction
Saltatory conduction
Retrograde conduction
Diffuse conduction
What is the role of myelin in nerve conduction?
It slows down the nerve impulse.
It speeds up the nerve impulse.
It has no effect on nerve conduction.
It reverses the direction of the nerve impulse.
Which ion is primarily responsible for the resting membrane potential?
Ca²⁺
K⁺
Cl⁻
Na⁺
What is the function of the synaptic cleft?
To separate the presynaptic and postsynaptic neurons
To transmit electrical signals
To store neurotransmitters
To generate action potentials
