Psyc 101. Quiz 2. A/B
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| What occurs during the refractory period? | Neurotransmitters are released by the dendrites.
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| The all-or-none law refers to the fact that: | the myelin sheath either completely covers an axon or it does not.
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| The heightened physical arousal that characterizes the fight-or-flight response involves the _____ branch of the nervous system. | somatic
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| Which of the following statements about the properties of neurons is TRUE? | Sensory and motor neurons are the same size and shape, and interneurons are long and thin.
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| The statement that most people only use about 10% of their brain: | has been proven by modern brain research.
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| An action potential occurs when: | potassium ions are electrically transformed into sodium ions.
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| The point of communication between two neurons is called the: | conjunction.
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| The cell body of a neuron: | manufactures myelin.
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| The occipital lobe is to _____ as the temporal lobe is to _____. | vision; audition
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| Which of the following best defines a neurotransmitter? | a special magnetic wave used to generate detailed images of individual neurons
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| About 70% of left-handed people | are bilateral, using both hemispheres for language functions.
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| Your pencil starts to roll off the desk and in a smooth, coordinated fashion you grab it just before it rolls off the edge. Your ability to perform this action involved which of the following brain areas? | the hippocampus
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| During the war in Iraq, some U.S. troops carried atropine injection kits as an antidote to nerve gas. How does the drug atropine counteract nerve gas? | Atropine blocks acetylcholine receptor sites.
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| Miguel jogs about five miles a day. At roughly the three-mile point, Miguel usually experiences a rush of positive feelings due to _____ levels of _____. | increased; endorphins
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| Multiple sclerosis is a disease that involves: | dendrites becoming brittle and breaking.
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| The part of the neuron that carries messages to other cells in the body is the: | nucleus.
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| Damage to Wernicke's area in the brain: | produces difficulty speaking but does not disrupt the ability to comprehend verbal or written words.
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| After too many drinks at a party, your friend awkwardly stumbles into a table, almost knocking it over. Your friend's coordination for simple actions, such as walking between two tables, is reduced because the alcohol has affected his: | thalamus.
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| Which of the following neurotransmitters is implicated in Alzheimer's disease? |
GABA
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| Jake received a severe brain injury in a motorcycle accident and was partially paralyzed on the left side of his body. After several months of intensive physical therapy, he gradually regained the use of his left leg and arm. | This example best illustrates the principle of:
structural plasticity.
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