Nervous System Part 2 Crash Course

How do neurons communicate different types of information if their signals are uniform in strength and speed?

• By using different types of pulses

• By altering the length of each pulse

• By changing the strength of each pulse

• By varying the frequency of pulses

What is the measure of potential energy generated by separated charges in neurons called?

• Current

• Resistance

• Voltage

• Capacitance

What is the resting membrane potential of a neuron typically around?

• -55 millivolts

• +40 millivolts

• -70 millivolts

• 0 millivolts

Which protein is crucial for maintaining the resting membrane potential by pumping ions across the neuron membrane?

• Magnesium pump

• Chloride pump

• Sodium-potassium pump

• Calcium pump

What is the term for the temporary reversal of a membrane potential during an action potential?

• Repolarization

• Depolarization

• Graded potential

• Hyperpolarization

What happens during the refractory period of an axon?

• The axon becomes hyperpolarized permanently

• The axon generates multiple action potentials

• The axon cannot respond to any other stimulus

• The axon can respond to any stimulus

How does the frequency of action potentials change with the intensity of a stimulus?

• It remains constant regardless of intensity

• It fluctuates randomly

• It decreases with higher intensity

• It increases with higher intensity

What is the effect of a myelin sheath on the speed of action potential conduction?

• It stops the conduction entirely

• It slows down the conduction

• It has no effect on the conduction speed

• It speeds up the conduction