A scientist is studying a type of cell and discovers that this cell uses kinesin to transport secretory vesicles down long cytoplasmic extensions. Upon further study, the vesicles are found to contain the substance acetylcholine. What is the most likely classification of this cell?

An experimental drug is given to a patient. The drug is known to inhibit the activity of acetylcholinesterase. What effect would most likely be observed in the patient as a result of this drug?

What neurotransmitter is used to signal muscle contraction at the neuromuscular junction?

At the neuromuscular junction, receptors respond to neurotransmitters to facilitate the depolarization of muscle cell membranes. This is the first step in that muscle cell's ultimate contraction. Which types of receptors would be most likely found on the muscle cell, directly interacting with the neurotransmitter at the neuromuscular junction?

What part of the muscle cell allows an action potential to spread uniformly throughout the cell?

Clostridium tetani is a microorganism that causes constant muscle contraction, and results in the characteristic risus sardonicus, or lockjaw. The toxin produced by this organism acts on inhibitory neurons that downregulate the activity of excitatory neurons directly involved in the neuromuscular junction.

The release of which neurotransmitters are most likely to be inhibited during Clostridium tetani infection?

I. Glycine

II. Glutamate

III. GABA