Neurotransmitter Effects on Ion Channels Quiz
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Questions and Answers

Where are serotonergic neurons located?

  • Cerebellum
  • Pons - raphe nucleus (correct)
  • Thalamus
  • Hippocampus

Which enzyme acts on Norepinephrine to produce serotonin?

  • GABA transaminase
  • Phenylethanolamine N-methyl-transferase (PNMT) (correct)
  • Serotonin reuptake transporter
  • Dopamine decarboxylase

What are the functions of serotonin in the brain?

  • Memory formation
  • Temperature regulation
  • Muscle coordination
  • Appetite regulation (correct)

Which neurotransmitter is most frequently used in the central nervous system as an excitatory neurotransmitter?

<p>Adenosine Triphosphate (ATP) (C)</p> Signup and view all the answers

Which receptor will open when glutamate is present and the postsynaptic membrane is depolarized?

<p>N-methyl-D-aspartate (NMDA) receptor (D)</p> Signup and view all the answers

What is the main characteristic of ionotropic receptors?

<p>They induce a fast reaction to neurotransmitters (A)</p> Signup and view all the answers

What is the role of autoreceptors in neurotransmission?

<p>Inhibit synthesis and release of neurotransmitter (B)</p> Signup and view all the answers

What is the function of G proteins in metabotropic receptors?

<p>Indirectly influence neuron activities through second messengers (D)</p> Signup and view all the answers

What happens when a neurotransmitter binds to a metabotropic receptor?

<p>Synthesis of second messenger is triggered (C)</p> Signup and view all the answers

Which type of receptor leads to graded depolarization in the cell?

<p>Ionotropic receptors (A)</p> Signup and view all the answers

What is the role of second messengers in neurotransmission?

<p>Interact with various parts of the cell after being activated by synaptic activity (B)</p> Signup and view all the answers

What type of neurotransmitter operates slower than excitatory and inhibitory neurotransmitters?

<p>Modulatory neurotransmitter (A)</p> Signup and view all the answers

Which type of neurotransmitter is known to be synthesized in the presynaptic terminal and has a fast effect on adjacent receptors?

<p>Small-molecule transmitter (A)</p> Signup and view all the answers

Neuromodulation takes place over what duration of time?

<p>Minutes (C)</p> Signup and view all the answers

Which neurotransmitter is linked with symptoms like increased salivation, muscle weakening, blurred vision, and paralysis?

<p>ACh (A)</p> Signup and view all the answers

What distinguishes monoamines from small-molecule transmitters in terms of vesicle recycling?

<p>Monoamines have vesicles that are not recycled (A)</p> Signup and view all the answers

What is required for the release of monoamines from the synaptic gap?

<p>Single action potential (D)</p> Signup and view all the answers

What is the main difference between the activation of ionotropic receptors and metabotropic receptors?

<p>Metabotropic effects can last longer than ionotropic effects. (A)</p> Signup and view all the answers

Where does inhibitory input predominantly occur within a neuron?

<p>Synapse of the cell body (B)</p> Signup and view all the answers

What happens when excitatory postsynaptic potentials (EPSPs) and inhibitory postsynaptic potentials (IPSPs) reach the axon hillock?

<p>They trigger an Action Potential. (A)</p> Signup and view all the answers

What is the process by which neurotransmitter molecules are deactivated in the synapse?

<p>Deactivating Enzyme (D)</p> Signup and view all the answers

Which mechanism involves repeated excitation from one active synapse evoking a cumulative effect over time?

<p>Temporal Summation (B)</p> Signup and view all the answers

In which part of a neuron is excitatory input mostly found?

<p>Dendrites (A)</p> Signup and view all the answers

Which enzyme acts on Dopamine to produce Norepinephrine?

<p>Dopamine hydroxylase (D)</p> Signup and view all the answers

Excessive sweating, high blood pressure, and anxiety are associated with increased levels of which neurotransmitter?

<p>Norepinephrine (D)</p> Signup and view all the answers

Which location is primarily associated with the neurotransmitter Serotonin?

<p>Pons (B)</p> Signup and view all the answers

Which neurotransmitter is a building block for adrenaline and is produced from Tryptophan?

<p>Serotonin (C)</p> Signup and view all the answers

Low energy levels, lack of concentration, and contributing to depressive feelings are symptoms associated with decreased levels of which neurotransmitter?

<p>Norepinephrine (D)</p> Signup and view all the answers

Which step in the production of Serotonin involves the action of the enzyme 5 HTP decarboxylase?

<p>Step 2: 5 HTP decarboxylase acting on 5 HTP (D)</p> Signup and view all the answers

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