Neuron and Action Potential Quiz

What are the three main parts of a neuron?

• Synapse, Nucleus, Myelin, Dendrites

• Axon, Nucleus, Myelin, Dendrites

• Soma, Synapse, Axon

• Dendrites, Soma, Axon

What is the function of dendrites in a neuron?

• To release neurotransmitters

• To receive signals from other neurons

• To generate action potential

• To store energy

What is the role of neurotransmitters in neuron communication?

• To convert chemical signals into electrical signals

• To store genetic information

• To form ionic bonds

• To act as a chemical signal

What is the role of ions in neuron communication?

• To convert chemical signals to electrical signals

• To store genetic information

• To form ionic bonds

• To act as a chemical signal

What is the resting membrane potential of a neuron? (Hint: Use "mV" for "miliVolts".)

What is the process called when the cell becomes less negative due to the influx of positive charge?

• Depolarization

• Hyperpolarization

• Repolarization

• Polarization

What is the result of the opening of ligand-gated Cl- ion channels?

• Action potential

• Inhibitory postsynaptic potential (IPSP)

• Excitatory postsynaptic potential (EPSP)

• Resting membrane potential

What triggers the opening of voltage-gated Na+ channels at the start of the axon?

• Change in pressure

• Change in temperature

• Change in pH level

• Change in voltage

Tags

NGSS.HS-PS2-5

What is the threshold charge required for an action potential to take place? (Hint: Use "mV" for "miliVolts".)

Tags

NGSS.HS-PS2-5

What is the function of myelin in the propagation of electrical signal in neurons?

• To speed up the signal

• To allow ions to flow into the cell

• To slow down the signal

• To generate electrical charge