Excitatory (EPSPs) occur when
* more potassium ions than usual leak out of a cell.
* more calcium ions than usual leak out of a cell.
* chloride ions enter a cell.
* sodium channels are opened.
* hyperpolarizations occur.
#
The ion needed to initiate the release of acetylcholine into the synaptic cleft is
* potassium.
* chloride.
* calcium.
* zinc.
* sodium.
#
In order to signal a stronger stimulus, action potentials become
* more frequent.
* all of these
* higher in amplitude.
* longer lasting.
#
Which of the following will increase the conduction rate of action potentials?
* Increase the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.
* Decrease the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.
* Increase the diameter of the axon, increase the resistance of the axon membrane to ion leakage.
* Decrease the diameter of the axon, increase the resistance of the axon membrane to ion leakage.
#
Active neurons require large amounts of ATP for
* axoplasmic flow.
* recycling neurotransmitters.
* the activity of the sodium-potassium pump.
* synthesis of neurotransmitters.
* all of these
#
Interruption of the supply of which of these can have devastating effects to the brain?
* oxygen
* all of these
* blood
* glucose
#
)Which of these functions is NOT housed in the medulla oblongata?
* centers for control of eye movement
* centers for control of breathing
* the pyramids, where tracts cross to the opposite side of the body
* centers for blood pressure control
* centers for control of vomiting
#
Which of these has a higher concentration in cerebrospinal fluid than in the blood?
* Na+
* H+
* K+
* HCO3-
* Ca2+
#
The most primitive region of the cerebrum is probably the
* limbic system.
* corpus callosum.
* pons.
* reticular system.
* basal nuclei.
#
Which brain area is considered to be the integrating center for homeostasis?
* medulla
* hypothalamus
* thalamus
* pituitary gland
* brain stem
#
The earliest discrete embryonic structure from which the entire nervous system eventually develops is the
* neural crest.
* neural plate.
* ependyma.
* ventricle.
* neural tube.
#
Which of these roles is NOT related to the reticular formation?
* arousal and sleep
* blood pressure regulation
* muscle tone and stretch reflexes
* pain modulation
* regulation of the menstrual cycle
#
The hypothalamus contains centers for __________.
* coordination of reproductive hormones
* temperature regulation
* fight-or-flight response
* growth
* behavioral drives
#
Long-term memory requires the formation of new synapses. MRI and PET scans have allowed researchers to identify __________ in the cerebral cortex.
* reflexes
* long term potentiation
* memory traces
#
Which statement is TRUE about sleep?
* All of these statements are true.
* It is an easily reversible state of inactivity.
* It is characterized by lack of interaction with the external environment.
* Sleep is now considered an active state, requiring neuronal activity.
* During a sleep cycle a person alternates between REM sleep and deep wave sleep.
#
Which of the choices below functions in the control of movement?
* hippocampus
* All of these function in the control of movement.
* basal nuclei
* amygdala
#
Reflexive memories are stored in areas of the
* occipital lobe.
* temporal lobe.
* cerebellum.
* frontal lobe.
* parietal lobe.
#
The brain’s interpretation of sensory stimuli is called
* cortices.
* vision.
* proprioception.
* perception.
* cerebral lateralization.
#
When a puppy is scolded "No!" each time he chews on your ficus tree, eventually he learns to leave the tree alone. This type of learning is called __________.
* associative
* nonassociative
* sensitization
* habituation
#
The structure that connects the two cerebral hemispheres is the
* basal nuclei.
* suprachiasmatic nucleus.
* gray "H."
* corpus callosum.
* hippocampus.
#
Reasoning arises in the outer layer of neurons of the
* amygdala.
* hippocampus.
* basal nuclei.
* cerebral cortex.
#
The measurement of brain activity is recorded by a procedure known as
* electrocardiography.
* electrocution.
* electromyography.
* electroencephalography.
* echoelectrography.
#
Language and verbal skills tend to be concentrated on the __________ side of the brain of right-handed people.
* neither (no lateralization exists)