Exam 3: Synapses

A drug that produces excitement, alertness, elevated mood, and decreased fatigue is referred to as a:

At the synapse, cocaine:

Most neurons release more than one kind of neurotransmitter.

Suppose a new neurotransmitter is identified that does not excite or inhibit postsynaptic cells, but affects the release of other neurotransmitters or the sensitivity of postsynaptic cells. This neurotransmitter would most likely be categorized as a(n):

A reflex arc consists only of sensory neurons.

Why are the withdrawal effects of marijuana usually less intense than other drugs?

Which of the following is TRUE about EPSPs?

Whether or not a neurotransmitter is excitatory depends on the response of the postsynaptic receptor.

The research that firmly established synaptic communication as chemical was:

Which one of Sherrington's inferences about the synapse was WRONG?

A new drug is discovered that affects the activity of enzymes. Which of the following stages of synaptic transmission is most likely to be affected?

Insulin increases the entry of tryptophan into the brain by:

Reflexive flexion and extension of a dog's legs can still occur when the spinal cord is disconnected from the brain.

If a drug has high affinity and low efficacy, what effect does it have on the postsynaptic neuron?

The catecholamines include:

In a reflex arc, the coordination between contraction of certain muscles and relaxation of others is mediated by:

Activation of autoreceptors tends to:

The "decision" for a neuron to fire is determined by the:

A chemical is called a(n) ____ when it flows through the blood to targets throughout the body.

Receptor molecules for neurotransmitters that exert metabotropic effects are proteins that bind to ____ outside the membrane, and attach to ____ inside the membrane.