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Dissection reveals that the brain is made up of many anatomically distinct areas composed of clusters of neuron cell bodies interspersed by bundles of myelinated axons and pathways between those clusters. These clusters of neuron cell bodies are referred to as


A) gray matter.
B) white matter.
C) the limbic system.
D) the subcortex.

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Regarding the brain, which of the following statements is FALSE?


A) Scientists typically use introspection to clarify how your eyes send information to your primary visual area and how other brain structures cooperate to interpret that information as written language.
B) Scientists have found that incoming information scatters all over the brain and converges again as it goes out through the spinal cord, to muscles and glands.
C) The brain is a vast information-processing system, keeping track of the external world and responding to current needs.
D) Understanding just how the brain lets you read, love someone, or even play catch may hold the key to improving ourselves and helping those who are experiencing difficulties.

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The fastest neurons can send impulses at about __________ miles per hour.


A) 200
B) 425
C) 150
D) 45

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The individual nerve cells specialized to carry and process information are called


A) neurotransmitters.
B) synapses.
C) ions.
D) neurons.

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Which of the following are defined by large fissures on the surface of the cortex or are regarded as separate areas because of their function?


A) the limbic systems
B) the lobes
C) the ventromedial chisms
D) the saltatory connections

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When the threshold for firing within a neuron occurs, we say that which of the following is taking place?


A) volume gradient
B) myelination
C) action potential
D) resting discharge

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Areas of the brain that are NOT primarily sensory or motor in function are called the


A) somatosensory areas.
B) association cortex.
C) temporal lobes.
D) incidental lobes.

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The human capacity to empathize and identify with other people's points of view and their feelings may arise directly from the activation of


A) mirror neurons.
B) the pons.
C) neurogenic nodes.
D) neurilemmas.

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Research by Daniel Langleben has shown that more activity will occur in the front of the brain when a person is lying than when telling the truth with the brain scan technique utilized in this research being the __________.

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functional...

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You are sitting on a stool when suddenly you lean back and fall off the stool, hitting the back of your head on the floor. You "see stars" as you try to sit back up. This sensation of "seeing stars" occurs because


A) neurons in your occipital lobe are stimulated.
B) your eyes are jarred to the extent stars are seen.
C) neurons in your retina are stimulated.
D) neurons in your hypothalamus are stimulated.

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Receptor sites for neurotransmitters are found in large numbers


A) on the axon terminals.
B) on dendrites and cell bodies.
C) within the ion channels.
D) on the myelin sheath and neurilemma.

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Which of the following hormones is released from the pituitary gland and plays a broad role in regulating many behaviors generally involved in happiness, including pregnancy, parenthood, sexual activity, social bonding, trust, and the reduction of stress reactions?


A) melatonin
B) oxytocin
C) corticoids
D) androgens

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In humans, which of the following looks like a giant, wrinkled walnut that consists of the two large hemispheres and covers the upper part of the brain?


A) cerebellum
B) cerebral cortex
C) limbic system
D) hippocampus

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A person who has aphasia would have an impaired


A) ability to walk.
B) sense of smell.
C) ability to see.
D) ability to use language.

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Musicians, who practice special motor skills throughout their lives, have larger than average cerebellums.

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Regarding dexterity, there is a greater portion of motor cortex devoted to the


A) hands and fingers.
B) feet and toes.
C) legs.
D) arms.

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Small gaps in the myelin result in nerve impulses jumping from gap to gap, which causes these nerve impulses to move


A) faster.
B) slower.
C) at a normal speed.
D) at a declining rate of speed.

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The three main areas of the subcortex are the


A) brainstem, cerebellum, and corpus callosum.
B) forebrain, brainstem, and the upper parts of the hindbrain.
C) brainstem, midbrain, and cerebral cortex.
D) brainstem, midbrain, and the lower parts of the forebrain.

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Regarding the cerebral cortex of humans, which of the following statements is FALSE?


A) The cerebral cortex covers most of the brain with a mantle of gray matter.
B) The cerebral cortex is only 10 millimeters thick (one third of an inch) .
C) The cerebral cortex contains 70 percent of the neurons in the central nervous system.
D) The cerebral cortex shows corticalization.

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Communication is carried out between neurons when neurotransmitters are released into the


A) neurilemma tunnel.
B) synaptic gap.
C) dendritic furrow.
D) ion channels.

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