Exam 7: The Nervous System: Neurons and Synapses

What action produces an IPSP on the postsynaptic membrane?

What is NOT true of conduction through dendrites and cell bodies of neurons?

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

The disease ______________ is characterized by destruction of CNS myelin sheaths and the formation of hardened scars.

Which poison inhibits glycine receptors?

Most motor neurons are multipolar.

Which gas(es)can function as a neurotransmitter?

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

During the absolute refractory period,a supramaximal stimulus can bring the cell to threshold.

The nigrostriatal dopamine system is located in part of the midbrain known as the substantia nigra and is degenerated in the disease myasthenia gravis.

What structure is found around PNS axons that is NOT found around CNS axons?

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

Axonal transport from the cell body to the dendrites and axon is retrograde transport.

Serotonin is degraded in presynaptic neurons by monoamine oxidase.

A lack of extracellular Ca²⁺ would cause increased release of neurotransmitters.

The brain produces lipid neurotransmitters called

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?

Nicotinic receptors utilize G-proteins to regulate the opening of ion channels.

Degeneration of spinal motor neurons in adults may be due to a lack of ____________ factor.

Catecholamines activate postsynaptic cells by