Action Potentials Practice Problems

Continuous propagation cannot occur in the myelinated axons because:

How does high concentration of potassium in the extracellular fluid affect the potential gradient across the cell membrane?

When sodium ions bind to the sodium-potassium pump, they trigger the pump to:

The synaptic cleft functions as a junction or small gap at which neurons communicate with each other. In which part of the neuron is the synaptic cleft usually found:

To successfully initiate an action potential the resting membrane potential needs to be:

The primary role of Acetylcholinesterase (AChE) in postsynaptic neuromuscular junctions is to:

When the Cl- channels in the postsynaptic membranes of a neuron are open for a prolonged period there will be hyperpolarization. What is expected to happen to action potentials in that neuron:

Andrea went on a trip to Japan and wanted to try the famous fugu (Japanese pufferfish). After eating at a random restaurant Andrea was found paralyzed in her hotel room. What is the toxin that is found in most pufferfish:

The drug lithium lowers the accessibility of Na+ into the neuronal axon. Explain how this would affect action potentials:

How would a neurotoxin like those found in snake venom affect nerve impulses:

What is the direct effect of repolarization in a nerve cell:

Dendrites are responsible for receiving synaptic inputs from other neurons and transmitting this information toward the: