Examlex
The president has many executive branch advisors to assist with making foreign and defense policy. To what extent is the president's foreign policy strength related to this large cadre of advisors? In what situations would the president be most likely to consult with each of the following: the vice president, the secretary of state, the secretary of defense, the secretary of Homeland Security, the director of National Intelligence, the National Security Council, and the Joint Chiefs of Staff?
Blood-Brain Barrier
A selective semipermeable barrier formed by endothelial cells of the brain's capillaries that protects the brain from harmful substances and pathogens in the bloodstream.
CNS
The central nervous system, comprised of the brain and spinal cord, responsible for processing and sending out neural signals.
Myelin Sheath
A fatty layer that encases the axons of some neurons, significantly increasing the speed at which nerve impulses are conducted.
Cerebrospinal Fluid
A clear, colorless body fluid found in the brain and spinal cord, acting as a cushion and providing basic mechanical and immunological protection to the brain.
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