Wednesday, May 22, 2024

week 3 practice question and explanation

Question 10
/ 1 pts
The refractory period of an action potential...
  
  
  
  
 Question 5
Question 5                                                                                                                           1 / 1 pts
One type of channel involved in generating postsynaptic potentials at a chemical synapse is the:
  
  
  
  
Question 11
/ 1 pts
The faster, more efficient way of propagating an action potential is:
  
  
  
  
 
Question 12
/ 1 pts
The threshold potential is best defined as the potential at which...
  
  
  
  
 
Question 13
/ 1 pts
Action potentials self-propagate because...
  
  
  
  

 Question 7

/ 1 pts
Which of the following does NOT happen to neurotransmitters during synaptic transmission termination?
  
  
  
  

Question 9

1 / 1 pts

During the absolute refractory period, the axon membrane:

  
  
  
  
 Incorrect
Question 6
/ 1 pts
Screen Shot 2022-08-26 at 11.01.39 AM.pngSelective serotonin reuptake inhibitors (or SSRIs), such as Prozac, Celexa, Lexapro, Paxil, and Zoloft, are a class of drugs used to treat mood disorders such as depression and anxiety. They inhibit the transporter responsible for serotonin reuptake into the presynaptic neuron. What is the effect of the SSRIs on the serotonin concentration in the synaptic cleft?
  
Incorrect. If the reuptake transporters are not working, there will be less serotonin reuptake. Therefore, more serotonin will remain in the cleft and will be available to stimulate postsynaptic neurons.
  
IncorrectQuestion 7
/ 1 pts

Which of the following does NOT happen to neurotransmitters during synaptic transmission termination?
  
  
  
  

Question 4

/ 1 pts

Identify the ion that would move through the channel to produce an IPSP.

Ions 1-3 are in the extracellular fluid (blue background),  ions 4-6 are in the cytosol (yellow background). Figure out which ion and which direction it would flow based on what you know about concentration gradients for each ion.

Screen Shot 2022-08-26 at 10.53.19 AM.png

  
  
  

Question 2

/ 1 pts
Some neurotransmitter receptors are ion channels that open when the neurotransmitter binds to them. Those receptors are called:
  
  
  
  
Question 10
/ 1 pts
The refractory period of an action potential...
  
  
  
  
Question 2
/ 1 pts

Some neurotransmitter receptors are ion channels that open when the neurotransmitter binds to them. Those receptors are called:
  
  
  
  
Question1                                                                                                    / 1 pts

Chlorpromazine (marketed under brand names Thorazine and Largactil) is a drug used to treat psychotic disorders such as schizophrenia or manic-depression in adults. Chlorpromazine was developed in the 1950s and its introduction as the first antipsychotic on the market has been labeled as one of the great advances in the history of psychiatry.

Chlorpromazine blocks postsynaptic receptors for several different neurotransmitters, such as dopamine and serotonin. Predict the effect of chlorpromazine on synaptic transmission by selecting all of the steps it will directly inhibit in the picture below.

Screen Shot 2022-08-26 at 10.45.58 AM.png

  
  
  
  
  

No comments:

Post a Comment