Test 2

Question 1

True or false: Competitive binding only happens in the presynaptic neuron.

Answer 1

False

Question 2

Which of the following would be classified as AGONIST effect for the neurotransmitter, ACh?

Answer 2

Blocking the reuptake of ACh and preventing degredation

Question 3

True or false: If a drug prevents an autoreceptor from working properly, this will be an agonist effect.

Answer 3

True

Question 4

Which of the following would be classified as AGONIST effect for the neurotransmitter, DA

Answer 4

Acting as a precursor for Da, stimulating a receptor, blocking an autoreceptor

Question 5

True or false: If a drug and a neurotransmitter can bind to the same postsynaptic receptor at the same time, this is an example of noncompetitive binding.

Answer 5

True

Question 6

Which of the following is involved in IPSPs in a neuron?

Answer 6

1. Cl- coming into the cell via Cl- channels
2. K+ leaving the cell via K+ channels

Question 7

Which of the ions listed below is pushed out of the cell at rest because of diffusion?

Answer 7

K+

Question 8

Which of the following is false regarding ions?

Answer 8

Ions can be either charged or uncharged, and Ions can be positively but not negatively charged.

Question 9

You are a scientist and you discover a previously-unknown post-synaptic receptor. You notice that when a neurotransmitter binds to this new post-synaptic receptor, an ion channel opens immediately. Based on this information, you would classify this new post-synaptic receptor as a

Answer 9

Ionotropic receptor

Question 10

You are a researcher studying ion channels in electric eels. One day you discover an ion channel. All you can discover about it is that it is closed at resting membrane potential, is opened by HYPERpolarization or increased NEGATIVE charge inside the cell, and that it allows a NEGATIVELY charged ion to enter the neuron. Based on what we learned in class, which of the following ion channels can this be?

Answer 10

It can be neither the Na+ nor the K+voltage-dependent channel

Question 11

You are a psychiatrist and you give one of your patients a drug that inhibits reuptake of serotonin. Which of the following best describes what this drug would do?

Answer 11

It would prevent serotonin frombeing moved back into the presynaptic axon terminal by transporter proteins.

Question 12

Which of the following best describes the process of degradation in termination of synaptic signaling?

Answer 12

It refers to the breakdown of neurotransmitters by enzymes in the synapse.

Question 13

Which of the following is true about what sodium-potassium transporters ‘do’ in a neuron?

Answer 13

Intracellular sodium concentrations are kept low.

Question 14

Which of the following is involved in EPSPs in a neuron (select all that apply)?

Answer 14

Na= ions and Na+ion channels