Exam 2: Communication Within the Nervous System

Describe the electrical and chemical events that initiate an action potential.

The most numerous neuron in the central nervous system is the interneuron.

Which of the following drugs is an agonist for acetylcholine?

Neurons make up only about % of the cells in the brain and about of its volume.

As myelin is lost from axons:

The fact that action potentials occur only at the nodes of Ranvier is the basis for:

Synapses can occur only between axon terminals of one neuron.

___ are atoms that have gained or lost one or more electrons.

The myelin sheath is formed by either oligodendrocytes or Schwann cells.

___ can be long enough to provide a direct connection between the spinal cord and the toes of a giraffe.

The primary function of an axoaxonic synapse is to:

Dopamine plays a key role in drug abuse.

The relationship between a neurotransmitter and its receptor is akin to a:

Anyone who carries an emergency bee sting kit might be surprised to learn it dispenses ___,which is a minor brain neurotransmitter as well as a hormone related to bodily stress.

After a few too many cups of coffee and having to find a restroom,Sal ironically remembered the meaning of the term vesicle,as in:

Which of the following statements regarding the sodium-potassium pump is false?

Conduction underneath the portions of axons covered by myelin is by graded potentials.

A multipolar neuron is always a sensory neuron.

Who first observed that neurons communicate at the synapse via chemicals?

One function of glial cells is to clean up the debris in the nervous system.