QuestionSBA
QuestionChoice
This is correct, glucose is a large molecule so has to cross the BBB via a GLUT1 glucose transporter via facilitated diffusion.
10002686
a
Glucose
QuestionChoice
This is incorrect, water is a small molecule that easily diffuses across the BBB.
10002690
e
Water
QuestionChoice
This is incorrect, Nitrous Oxide is a small molecule which readily diffuses across the BBB.
10002688
c
Nitrous Oxide
QuestionChoice
This is incorrect. Carbon Dioxide is a small inorganic molecule which readily diffuses across the BBB.
10002689
d
Carbon Dioxide
QuestionChoice
This is incorrect, oxygen is a small molecule which readily diffuses across the BBB.
10002687
b
Oxygen
Concept
Chapter
2693
4065
Blood-Brain Barrier
Topic
152
Neuroscience
13084
The blood-brain barrier is a crucial feature of the central nervous system as it is a highly selective semipermeable border formed of epithelial cells around the central nervous system that prevents certain molecules and pathogens in the blood from entering the central nervous system.

Which of these molecules below does not passively diffuse across the blood-brain barrier?
a