The blood-brain barrier is effective against the passage of ?
Metabolic waste such as urea
The blood-brain barrier is effective against the passage of ? Metabolic waste such as urea
Inflammation may cause the blood-brain barrier to become less effective at preventing the passage of toxic substances into brain tissue.
Potential barrier is the energy inserted in order to go against the passage of electron.
The plasma membrane
The Bowman's capsules barrier
Epithelial
Palm Passage - look at Reef Pilots web page
A tunnel 'operates' by allowing passage along a route through a barrier.
It can be defined as followed. A fence or other obstacle to prevent something.
A bridge is a structure spanning and providing passage over a gap or barrier, such as a river or roadway.
You're referring to the blood-brain barrier.
It separates the cell from its surroundings and acts as a selective barrier to the passage of substances in and out of the cell