Exam 7: The Nervous System: Neurons and Synapses

Spatial summation

______ synapses occur between axons of presynaptic cells and dendrites of postynaptic cells.

Regeneration of CNS axons may be prevented in part by inhibitory proteins in the membranes of the

Which of the following is NOT true of axonal transport?

Mutation of the N-methyl-D-aspartate (NMDA)receptor would affect the ability of ____________ to regulate neural function.

The blood-brain barrier may prevent medications from reaching brain tissue.

The blood-brain barrier results mostly from the action of __________,a type of glial cell.

The blood-brain barrier prevents hydrophobic molecules from diffusing into the brain.

Axonal regeneration is inhibited by

A nerve is a bundle of axons in the CNS.

The binding of a neurotransmitter to its receptor protein causes ion channels to open in the post-synaptic membrane.What type of gates are these?

Which of the following is NOT true of norepinephrine?

Conduction of an action potential in a myelinated axon is called

What action produces an IPSP on the postsynaptic membrane?

Alzheimer's disease is associated with the loss of cholinergic fibers that end at the hippocampus and cerebral cortex.

What type of proteins are present in gap junctions that form water-filled channels between neurons?

Synaptic vesicles are docked to the plasma membrane of the axon terminal by a protein complex called

Enhancing the excitability of a synapse so that transmission is favored along certain pathways is called

What type of proteins are present at chemical synapses to ensure the close proximity of the presynaptic and postsynaptic membranes?

In a ligand-gated channel,the neurotransmitter receptor and the channel are separate proteins.