Exam 3: Neurophysiology: The Structure and Functions of the Cells of the Nervous System

 ?(see Figure 3.20) During exocytosis, ________ ions enter the presynaptic terminal and trigger the migration of ________. ?

 The diameter of an axon is correlated with

 Protein structures on the postsynaptic neuron that have recognition sites on the extracellular side and G proteins on the intracellular side are known as

 Compared with unmyelinated axons, myelinated axons

 While Dr. Jackson is recording the activity of a squid axon, he finds that a larger depolarizing shock is necessary on occasion in order to produce a new action potential. What is the most likely explanation for Dr. Jackson's observations?

 In Alzheimer's disease, neurofibrillary tangles result when ________ proteins levels disconnect from microtubules.

 The most numerous of the cytoskeleton fibers are the

 When potassium concentrations in the extracellular fluid are increased, the resting potential

 When an axo-axonic synapse results in an increase of neurotransmitter released by a target axon, which of the following processes has occurred?

 Inhibitory postsynaptic potentials (IPSPs) generally result when _________ channels are opened.

 Tetrodotoxin from puffer fish interferes with the formation of action potentials by blocking

 The greater the influx of calcium into the presynaptic axon terminal, the greater the

 Sodium-potassium pumps move

 "Permeability" refers to the ability of the cell's

 Ion channels are made up of

 Conduction of action potentials in a myelinated axon is referred to as

 Extracellular fluid is rich in

 A neural structure that typically carries messages to other neurons is known as a(n)

 Which of the following disorders is characterized by a progressive demyelination of the nervous system?

 Compared with the myelin found on small diameter axons, the myelin coating axons of large diameter axons