Anuclear reactor is a. surrounded by a thick pressure vessel filled with a cooling fluid b. powered by a combustion chamber in which uranium is burned c. superheated by water until the control rods are set into motion

It is powered by a combustion chamber in which uranium is burned, or melted rather.

relationships play a major role in a human's emotional and mental wellbeing. healthy relationships with the people around you are even linked to a smaller production of cortisol, a stress hormone.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: