Brain and Nerve Impulses Quiz

How fast do nerve impulses transmit messages in the brain?

• 50 meters per second

• 100 meters per second

• 150 meters per second

• 200 meters per second

What is said to be more numerous in the brain than stars in the universe?

• Blood cells

• Nerve cells

• Muscle cells

• Skin cells

What is the functional unit of the neural system?

• Neurons

• Axons

• Synapses

• Dendrites

How do neurons communicate with each other in scientific terms?

• Chemical impulse

• Nerve impulse

• Magnetic impulse

• Thermal impulse

What type of signals generally travel along the axon of a neuron?

• Chemical signals

• Thermal signals

• Electrical signals

• Magnetic signals

What is the primary function of neurons as described in the text?

• To store energy

• To transmit nerve impulses

• To produce hormones

• To digest nutrients

What is the membrane potential?

• The difference in temperature inside and outside the cell

• The difference in total charge between the inside and outside of the cell

• The difference in pressure inside and outside the cell

• The difference in mass between the inside and outside of the cell

What is the resting membrane potential?

• The voltage difference when a neuron is active

• The voltage difference across the cell membrane in a resting state

• The voltage difference when a neuron is damaged

• The voltage difference when a neuron is excited

What is an action potential?

• A long-term change in the electrical potential

• A short-term change in the electrical potential

• A permanent change in the electrical potential

• A medium-term change in the electrical potential

What triggers the generation of a nerve impulse?

• A weak stimulus

• A strong stimulus

• A chemical imbalance

• A temperature change