The naturally occurring barrier between the brain and the bloodstream that prevents many substances from entering the brain is called the __________.
A) neuroprotective organ
B) endogenous system
C) endocrine system
D) blood-brain barrier

Question

Quizplus · Accepted Answer

The blood-brain barrier is a selective barrier made up of cells that only allow certain substances, such as glucose and oxygen, to pass through into the brain while blocking many others. This barrier helps to protect the brain from harmful chemicals and pathogens that could potentially cause damage.

The Naturally Occurring Barrier Between the Brain and the Bloodstream