Question :
41.Actor Michael J. Fox and boxing great Muhammad Ali have : 1231184
41.Actor Michael J. Fox and boxing great Muhammad Ali have a disease that leads to progressive loss of their motor functioning. This condition results from a shortage of
A)epinephrine.
B)norepinephrine.
C)dopamine.
D)gamma-amniobutyric acid (GABA).
E)serotonin.
42.Regarding Parkinson’s disease, which of the following statements is FALSE?
A)Scientists believe that genetic factors are involved.
B)It is a degenerative brain disease.
C)Symptoms include tremors, muscle rigidity, and difficulty controlling finger and hand movements.
D)It affects about 1.5 million Americans.
E)It involves an excess of the neurotransmitter glutamate.
43.Regarding neurotransmission, which of the following statements is FALSE?
A)The nervous system depends on a balance between neural excitation and inhibition to function effectively.
B)Excitatory effects make an action potential more likely to occur, whereas inhibitory effects make action potentials less likely to occur.
C)All neurotransmitters have both excitatory and inhibitory effects.
D)Neurotransmitters that do not dock at receptor sites are decomposed in the synaptic gap or are reabsorbed by the transmitting neuron.
E)Neurotransmitters carry messages controlling all aspects of human activity, from the biological to the mental to the emotional.
44.Agonists do all of the following EXCEPT
A)increase the availability of neurotransmitters.
B)increase the effectiveness of neurotransmitters.
C)block reuptake of neurotransmitters.
D)mimic the action of neurotransmitters.
E)block receptor sites.
45.In contrast to agonists, antagonists are drugs that
A)increase the availability of neurotransmitters.
B)increase the effectiveness of neurotransmitters.
C)block receptor sites.
D)mimic the action of neurotransmitters.
E)speed up the transmission of neural impulses.
46.Agonists________, whereas antagonists ________.
A)increase the availability of neurotransmitters; increase the effectiveness of neurotransmitters
B)block receptor sites; increase the effectiveness of neurotransmitters.
C)increase the availability of neurotransmitters; block receptor sites.
D)speed up the transmission of neural impulses; mimic the action of neurotransmitters
E)speed up the transmission of neural impulses; increase the effectiveness of neurotransmitters
47.Shelley drinks two caffeinated grande lattes every morning. In terms of neurotransmission, what is happening in Shelley’s body?
A)Caffeine in the coffee serves as an agonist that suppresses the actions of glutamate and enhances the actions of dopamine.
B)Caffeine in the coffee serves as an agonist that suppresses the actions of dopamine.
C)Caffeine in the coffee serves as an antagonist that enhances the actions of glutamate.
D)Caffeine in the coffee serves as an agonist that enhances the actions of glutamate.
E)Caffeine in the coffee serves as an antagonist that suppresses the actions of dopamine.
48.Which of the following acts as an antagonist rather than an agonist?
A)Amphetamines that produce states of pleasure.
B)Caffeine that keeps the central nervous system stimulated.
C)Antipsychotic drugs that help control hallucinations and delusional thinking..
D)Alcohol that produces a relaxed feeling.
E)A tranquilizer like Valium that reduces anxiety in people with panic disorder.
49.Which of the following is an antagonist the blocks the actions of a particular neurotransmitter?
A)Amphetamines that produce states of pleasure.
B)Caffeine that keeps the central nervous system stimulated.
C)Antipsychotic drugs that help control hallucinations and delusional thinking.
D)Alcohol that produces a relaxed feeling.
E)A tranquilizer like Valium that reduces anxiety in people with panic disorder.
50.Cocaine and amphetamines increase the availability of which neurotransmitter?
A)Glutamate
B)Serotonin
C)Norepinephrine
D)Dopamine
E)Gamma-amniobutyric acid (GABA)
