U1.L3: The Neuron

Which part of the neuron receives signals from other neurons?

• Axon

• Dendrite

• Soma

• Myelin sheath

What is the primary function of the axon in a neuron?

• To receive signals

• To process signals

• To transmit signals

• To insulate the neuron

Which of the following best describes an action potential?

• A resting state of the neuron

• A rapid rise and fall in voltage across a cellular membrane

• A slow, steady increase in voltage

• A decrease in voltage leading to hyperpolarization

What is the role of the myelin sheath?

• To generate action potentials

• To insulate the axon and speed up neural transmission

• To receive neurotransmitters

• To connect neurons to blood vessels

Which type of neuron is responsible for carrying signals from the central nervous system to muscles?

• Sensory neurons

• Motor neurons

• Interneurons

• Glial cells

What is the synaptic cleft?

• The gap between the axon terminal and the dendrite of another neuron

• The part of the neuron that generates action potentials

• The insulating layer around the axon

• The cell body of the neuron

Which ion is primarily responsible for the depolarization phase of an action potential?

What is the function of sensory neurons?

• To transmit signals to muscles

• To process information within the central nervous system

• To carry information from sensory receptors to the central nervous system

• To insulate other neurons

Which part of the neuron contains the nucleus?

• Axon

• Dendrite

• Soma

• Myelin sheath

What is the refractory period in neural transmission?

• The time during which a neuron is generating an action potential

• The time during which a neuron cannot fire another action potential

• The time during which neurotransmitters are released

• The time during which the neuron is at rest