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Essential Biochemistry - Neurotransmitters (Section 2)

1
Which of the following is an inhibitory neurotransmitter?
Answer
(A)
GABA
2
What is the function of dendrites?
Answer
(B)
Receive impulses and transmit them towards the cell body
3
What is the name of the enzyme that degrades acetylcholine?
Answer
(A)
Acetylcholinesterase
4
Which neurotransmitter acts as a local depolarizer?
Answer
(C)
Acetylcholine
5
Following are the amine neurotransmitters, except:
Answer
(D)
Acetylcholine
6
Which condition is marked with an excess production of serotonin?
Answer
(B)
Carcinoid Syndrome
7
Which type of neurotransmitter is involved in the production of new impulse?
Answer
(B)
Excitatory neurotransmitter
8
Which of the following are ways in which neurotransmitters are removed from the synaptic cleft?
Answer
A
B
C
9
What structure is a site of functional contact between a neuron and another cell?
Answer
(B)
Synapse
10
Which of the following processes is involved in the release of acetylcholine in response to an action potential?
Answer
(C)
Ca2+ dependent
11
Where are catecholamines stored?
Answer
(B)
In synaptic vesicles
12
Which neurotransmitter is derived from tryptophan?
Answer
(B)
Serotonin
13
What type of channels are opened in the postsynaptic membrane when acetylcholine binds to its receptors?
Answer
(A)
Na+ channels
14
Functions of serotonin include:
Answer
A
B
C
D
15
The excitatory effects of catecholamines are exerted upon:
Answer
(D)
The CNS
16
GABA is an amino acid derivative and is synthesized from
Answer
(B)
Glutamate
17
Various stimuli that activate neurons include:
Answer
A
B
C
18
How is histamine synthesized?
Answer
(B)
From histidine
19
In what process does serotonin undergo Ca2+ dependent release from synaptic vesicles?
Answer
(A)
Degradation
20
Which neurotransmitter, when in excess production, can be marked by
Answer
(C)
Serotonin
21
Which is the most abundant inhibitory neurotransmitter in the brain?
Answer
(A)
GABA
22
Inhibitory effects on smooth muscle are exerted by:
Answer
(C)
Bronchial tree of the lungs
23
A synapse is:
Answer
(A)
A site of neuron-to-neuron communication.
24
Which of the following neurotransmitters is a catecholamine?
Answer
(D)
Dopamine
25
Which neurotransmitters are involved in the treatment of renal failure?
Answer
(A)
Dopamine
26
Which of the following statements are true regarding reuptake mechanisms in the synapse?
Answer
A
B
C
27
What is the role of high affinity reuptake mechanism in the synapse?
Answer
(C)
To re-incorporate neurotransmitters into the presynaptic vesicles.
28
Which neurotransmitter is involved in the sleep-wake cycle?
Answer
(B)
Serotonin
29
Where is histamine mainly found?
Answer
(A)
Hypothalamus
30
Which of the following is synthesized from tyrosine?
Answer
(C)
Dopamine
31
Which of the following statements about neurotransmitters is/are correct?
Answer
A
B
C
D
32
Which of the following is the first chemical neurotransmitter identified?
Answer
(C)
Acetylcholine
33
Which of the following is a characteristic of a typical synapse?
Answer
(B)
Presence of a synaptic cleft
34
Where are neurotransmitters synthesized?
Answer
(C)
Nerve ending
35
Which of the following is not a neurotransmitter?
Answer
(D)
Serine
36
What enzyme is required for the degradation of acetylcholine?
Answer
(B)
Acetylcholinesterase (AChe)
37
Which type of receptors binds neurotransmitters and causes an increase of Cl- conductance?
Answer
(A)
GABA receptors
38
Catecholamines are:
Answer
(B)
A class of neurotransmitters.
39
Which is the name given to the site where communication between neurons occur?
Answer
(B)
Synapse
40
Which of the following events occurs in the synaptic cleft?
Answer
(B)
Neurotransmitters bind to receptors on the postsynaptic membrane.
41
Which of the following is an inhibitory neurotransmitter?
Answer
(A)
GABA
42
Which of the following is a function of GABA?
Answer
(A)
Stimulates the anterior pituitary
43
What is the precursor for acetylcholine synthesis?
Answer
(B)
Choline and Acetyl-CoA
44
Which of the following are classified as catecholamines?
Answer
A
B
D
45
Which of the following best describes the action of excitatory neurotransmitters?
Answer
(C)
They cause local depolarization.
46
Which of the following events occurs during neurotransmitter release?
Answer
(B)
Calcium ions enter the presynaptic neuron
47
Which type of neurotransmitter causes local depolarization?
Answer
(A)
Excitatory neurotransmitter
48
Neurotransmitter serotonin is derived from:
Answer
(A)
Tryptophan
49
Following are the amine neurotransmitters, except:
Answer
(D)
Acetylcholine
50
What is the function of serotonin?
Answer
A
B
C
D