Mastering Ch9 Flashcards
Why was Ben put on a one month regimen of adrenocorticotropic hormone (ACTH) after being diagnosed with infantile spasms?
To enhance the binding of GABA at the synapses.
Why did the doctor order a PET scan of Ben’s brain after his head drop seizures returned?
To check for areas of the brain that are overly active.
What is the direct cause of the seizures associated with infantile spasms?
ncreased action potential delivery by abnormal regions of the brain
Why is it important to catch infantile spasms early and immediately start intervention?
Continuous action potentials can result in permanent synaptic connections that are abnormal, disrupting proper development of the brain
What were the results of Ben’s PET scan and how will he be treated?
There are two areas in the cerebrum that display too much activity; they will be removed via a surgical procedure.
Which of the following structure allows communication between the two hemispheres of the brain?
Corpus callosum
A(n) __________ agonist could affect pain and locomotion
serotonin
A stroke may have different effects on a patient depending upon where in the brain it occurs. Where would a stroke have occurred if a right-handed patient loses the ability to write (agraphia) because of lack of sensation?
left parietal lobe
Which of the following is the function of the reticular formation?
arousal
Cerebrospinal fluid circulates through the central nervous system (CNS). It leaves the CNS and enters the bloodstream through which structure(s)?
Arachnoid villus
Which of the following is responsible for selectively transports substances into the ventricles of the brain from the bloodstream?
choroid plexus
Which of the following best describes the role of the blood-brain barrier?
The blood-brain barrier is formed by tight junctions between capillary endothelial cells which prevent movement of solutes between cells.
Which mechanism most likely explains the regularity of the internal clock that controls circadian rhythms?
A feedback loop based on gene regulation and protein production
Traditionally, it is taught that the neuron is the functional unit of the nervous system. What do some neuroscientists suggest is a more accurate functional unit? Why?
A neural network, because even the most basic functions require circuits of neurons rather than just a single neuron
Which part or characteristic of the nervous system is the most different when comparing humans with other animals?
The cerebrum
