Revision Structure of the Nervous System Quiz

Which type of neuron sends impulses from receptors in the skin and sense organs to the brain and spinal cord?

• Motor neuron

• Interneuron

• Sensory neuron

• Reflex arc neuron

What are the three main regions of a neuron?

• Diffusion, ion channels, endocytosis

• Neurotransmitter, action potential, myelin

• Synapse, node, threshold

• Dendrites, cell body, axon

What is the minimum stimulus to cause an action potential to be produced called?

• Neurotransmitter

• Myelin sheath

• Threshold

• Reflex arc

What is the small gap between the axon of one neuron and the dendrite of another neuron called?

• Dendrite

• Node

• Myelin

• Synapse

Which is NOT a step that leads to the voluntary contraction of a muscle?

• Sodium ions enter skeletal muscle

• A neurotransmitter binds to receptors on skeletal muscle

• An action potential travels along the muscle fiber

• A neurotransmitter is released from a sensory neuron

Which happens first after the threshold is reached for an action potential?

• They cannot move between nodes on neurons

• They move at one speed on all neurons

• They move faster on neurons that have myelin

• They move only on neurons that do not have myelin

Which is true about action potentials?

• Sensory neuron → interneuron → motor neuron

• Motor neuron → sensory neuron → interneuron

• Interneuron → motor neuron → sensory neuron

• Motor neuron → interneuron → sensory neuron

Which is a chemical that diffuses across a synapse and binds to receptors on a neighboring neuron?

• A neurotransmitter binds to receptors on skeletal muscle

• A neurotransmitter

• An action potential travels along the muscle fiber

• Sodium ions enter skeletal muscle

Which is the correct path that a nerve impulse will follow in a reflex arc?

• Myelin

• Node

• Neurotransmitter

• Dendrite

Which is NOT a factor that affects action potential speed?

• Neurotransmitter

• Neuron diameter

• Temperature

• Myelin sheath