Which of the following most correctly describes the sequence of toxic events that occur in brain during a stroke?
a. increased blood flow > activation of NA+/K+ transporters > membrane hyperpolarization > GABA release > excessive accumulation of extracellular CA++
b. reduced blood flow > inactivation of Na+/K+ transporters > membrane depolarization > glutamate release > excessive accumulation of intracellular CA++
c. reduced blood flow > activation of Na+/K+ transporters > membrane hyperpolarization > DA release > excessive accumulation of intracellular CL-
d. reduced blood flow > inactivation of Na+/K+ transporters > membrane hyperpolarization > GABA release > excessive accumulation of intracellular CA++
e. increased blood flow > reduced accumulation of extracellular CA++ > membrane hyperpolarization > GABA release
Question 2
A 50-year-old man has experienced a major stroke caused by a thrombus that occluded brain blood vessels. To prevent the occurrence of another stroke, his physicians would most likely
a. administer an anticoagulant.
b. administer drugs that lower blood pressure.
c. cut out the embolus using invasive surgery.
d. use deep brain stimulation to facilitate neuron regrowth.
e. administer massive doses of antibiotics.
Brain Interpretation and Regions
Pre–Main-Sequence Evolutionary Tracks
A model of anxiety in which stressful events or a changing mental condition can produce unfavorable
Validation of the genetic code by amino acid sequence analysis of T4 phage lysozyme mutants
Regulation can occur at any stage in the expression of genetic material in eukaryotes
Sensory Areas of the Brain