Exam 12: Nervous System: Nervous Tissue

The nervous system contains more neurons than glial cells.

The type of voltage-gated channel that possesses an inactivation gate that temporarily closes after the channel is active is the

Neurotransmitter is released from the synaptic knob by exocytosis,and it then diffuses across the synaptic cleft.

A neurotransmitter binds chemically gated ion channels on the postsynaptic cell,causing a depolarization.Functionally,this neurotransmitter can be classified as excitatory.

A nerve cell that has dendrites but no axons is categorized as a(n)___________ neuron.

The separation of oppositely charged ionic particles across a resting neuron's membrane results in a potential that is measured as a

Chemical synapses are more common than electrical synapses.

Contrast chemically gated and voltage-gated channels.How do their functions differ In which segments of a neuron are they found

When transmission occurs at a synapse,neurotransmitter is released by

The type of transport protein that moves a substance down its concentration gradient is a

The size of an EPSP is independent of the amount of excitatory neurotransmitter that is released by the presynaptic cell.

An action potential involves a temporary reversal of polarity across the plasma membrane (that is,the inside of the axon becomes relatively positive compared to the interstitial fluid).

You walk into a restaurant and amidst the sights,sounds,and smells of food preparation,you notice that you have begun to salivate.This is evidence that a particular neuronal circuit has been activated.Which one

Based on function,the vast majority of neurons are

In a mixed nerve

What effect would an acetylcholinesterase inhibitor have on an acetylcholine synapse Describe how you think it would influence muscle function.What effect do serotonin reuptake inhibitors have on serotonin synapses Describe how you think they influence mood.

As it moves from the tip of a dendrite to the axon hillock,a postsynaptic potential will maintain a constant amplitude.

Somatic motor neuron axons fall into the category of

To measure the resting potential of a neuron,a physiologist would place

Which functional class of neurons lies entirely within the central nervous system