Question 1

Excitatory postsynaptic potentials are produced by

Accepted Answer

A)  glycine.
B)  glutamic acid.
C)  gamma-aminobutyric acid.
D)  benzodiazepines.

Question 2

Repolarization is accomplished through a

Accepted Answer

A)  positive feedback loop.
B)  negative feedback loop.
C)  relative refractory loop.
D)  sodium equilibrium potential.

Question 3

Neuroleptics,which are used to treat schizophrenia,are

Accepted Answer

A)  dopamine agonists.
B)  ACh antagonists.
C)  dopamine antagonists.
D)  glutamate agonists.

Question 4

What is the action of the binding of muscarine to its receptors in the digestive system?

Accepted Answer

A)  alpha subunits bind to K+ channels,close them,leading to depolarization.
B)  alpha subunits bind to K+ channels,open them,leading to hyperpolarization.
C)  beta-gamma subunits bind to K+ channels,close them,leading to depolarization.
D)  beta-gamma subunits bind to K+ channels,open them,leading to hyperpolarization.

Question 5

Parkinson's disease is associated with the loss of dopaminergic neurons.

Accepted Answer

A) True 
 B)False

Question 6

The period of time when Na+ channels are recovering from their inactive state and K+ channels are still open is the

Accepted Answer

A)  repolarization.
B)  absolute refractory period.
C)  relative refractory period.
D)  Repolarization and relative refractory period are correct.

Question 7

Which type of cell lines the ventricles of the brain and help produce cerebrospinal fluid?

Accepted Answer

A)  microglia
B)  satellite cells
C)  ependymal cells
D)  oligodendrocytes

Question 8

Chemical synapses

Accepted Answer

A)  have a delayed impulse transmission.
B)  utilize gap junctions.
C)  occur when two nerve cells are in direct contact with each other.
D)  do not require the release of neurotransmitters.

Question 9

Cholinergic fibers use ____ as the neurotransmitter.

Accepted Answer

A)  norepinephrine
B)  acetylcholine
C)  dopamine
D)  serotonin

Question 10

Chemicals that stimulate action potentials in postsynaptic cells are called

Accepted Answer

A)  hormones.
B)  enzymes.
C)  neurotransmitters.
D)  neurotrophins

Question 11

White matter is

Accepted Answer

A)  myelinated axons in the CNS.
B)  myelinated axons in the PNS.
C)  nonmyelinated cell bodies and dendrites in the CNS.
D)  nonmyelinated axons in the CNS.

Question 12

Which of the following is NOT an action needed for glutamate to open ion channels?

Accepted Answer

A)  NMDA receptor must bind to glycine
B)  the membrane must be partially depolarized from the action of a different neurotransmitter
C)  Cl- must pass through the open channel
D)  Mg2+ is released from NMDA channel to open it

Question 13

An inhibitory postsynaptic potential would be produced by a neurotransmitter opening Cl- channels.

Accepted Answer

A) True 
 B)False

Question 14

Ligand-gated channels,when activated,allow only Na+ to move into the neuron.

Accepted Answer

A) True 
 B)False

Question 15

Postsynaptic inhibition is caused by

Accepted Answer

A)  acetylcholine
B)  GABA
C)  glycine
D)  GABA and glycine

Question 16

What action produces an IPSP on the postsynaptic membrane?

Accepted Answer

A)  influx of Na+ ions
B)  opening of Ca2+ channels into the neuron
C)  outflow of K+ ions
D)  opening of Cl- channels into the neuron

Question 17

____________ is an acetylcholinesterase antagonist used to treat myasthenia gravis.

Accepted Answer

A)  Neostigmine
B)  Muscarine
C)  Naloxone
D)  Nitric oxide

Question 18

Which division of the nervous system innervates involuntary effectors?

Accepted Answer

A)  central nervous system
B)  somatic nervous system
C)  autonomic nervous system
D)  associative nervous system

Question 19

Action potentials would be conducted most rapidly by

Accepted Answer

A)  a 10 mm diameter myelinated axon.
B)  a 10 mm diameter unmyelinated axon.
C)  a 40 mm diameter myelinated axon.
D)  a 40 mm diameter unmyelinated axon.

Question 20

Serotonin is synthesized from the amino acid

Accepted Answer

A)  alanine.
B)  glycine.
C)  tryptophan.
D)  serine.

Exam 7: The Nervous System: Neurons and Synapses

Chemicals that stimulate action potentials in postsynaptic cells are called

Correct AnswerverifiedShow Answer

Excitatory postsynaptic potentials are produced by

Correct AnswerverifiedShow Answer

Postsynaptic inhibition is caused by

Correct AnswerverifiedShow Answer

What is the action of the binding of muscarine to its receptors in the digestive system?

Correct AnswerverifiedShow Answer

____________ is an acetylcholinesterase antagonist used to treat myasthenia gravis.

Correct AnswerverifiedShow Answer

Which type of cell lines the ventricles of the brain and help produce cerebrospinal fluid?

Correct AnswerverifiedShow Answer

Parkinson's disease is associated with the loss of dopaminergic neurons.

Correct AnswerverifiedShow Answer

Cholinergic fibers use ____ as the neurotransmitter.

Correct AnswerverifiedShow Answer

Which of the following is NOT an action needed for glutamate to open ion channels?

Correct AnswerverifiedShow Answer

Repolarization is accomplished through a

Correct AnswerverifiedShow Answer

What action produces an IPSP on the postsynaptic membrane?

Correct AnswerverifiedShow Answer

Serotonin is synthesized from the amino acid

Correct AnswerverifiedShow Answer

Which division of the nervous system innervates involuntary effectors?

Correct AnswerverifiedShow Answer

Action potentials would be conducted most rapidly by

Correct AnswerverifiedShow Answer

An inhibitory postsynaptic potential would be produced by a neurotransmitter opening Cl- channels.

Correct AnswerverifiedShow Answer

The period of time when Na+ channels are recovering from their inactive state and K+ channels are still open is the

Correct AnswerverifiedShow Answer

Neuroleptics,which are used to treat schizophrenia,are

Correct AnswerverifiedShow Answer

White matter is

Correct AnswerverifiedShow Answer

Ligand-gated channels,when activated,allow only Na+ to move into the neuron.

Correct AnswerverifiedShow Answer

Chemical synapses

Correct AnswerverifiedShow Answer

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An inhibitory postsynaptic potential would be produced by a neurotransmitter opening Cl^- channels.

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The period of time when Na⁺ channels are recovering from their inactive state and K⁺ channels are still open is the

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Ligand-gated channels,when activated,allow only Na⁺ to move into the neuron.

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