A. transient shortage of oxygen (global ischemia) releases excess glutamate into the extracellular fluid of the brain. this causes neuronal death by hyperexcitation to a greater extent in the hippocampus than in the cortex. which reason best explains why the hippocampus is selectively vulnerable during gloabl ischemia?
a. the mag of ap is greater in hippocampal than cortical neurons
b. the expression of nmda receptors is more abundant in hippocampal than cortical neuorns
c. hippocampal neurons generate a more negative postsynaptic potential than cortical neurons
d. hippocampal synapses have faster neurotransmitter diffusion rates compared to cortical synapses

Astudy that involves interviews of adults is eligible for expedited review. the researcher wants to add an adolescent population (aged 12 to 17) to the study and has designed a parental permission and assent process. no additional changes are planned. which of the following statements about review of the revised protocol is accurate? the research would only be eligible for expedited review if the adolescents are capable of understanding the same consent forms used for the adult population. the research would only be eligible for expedited review if the adolescents have been declared to be emancipated minors. the new research would need full review by a convened irb because children are a protected population. unless the nature of the questions would raise the level of risk to > minimal for adolescents, the research would still qualify for expedited review.