Blood Supply of Brain Flashcards
What is the blood-brain barrier (BBB)?
A selective barrier that prevents toxins and pathogens from entering the CNS.
What is the main function of the cerebrospinal fluid (CSF)?
Circulates in brain ventricles, providing nutrients and removing waste
Which major arteries supply the brain with oxygenated blood?
Internal carotid arteries & vertebral arteries.
What is the Circle of Willis?
A network of arteries that ensure continuous blood supply to the brain.
What is a common site for strokes in the brain?
The middle cerebral artery.
What is the pathway of venous return from the brain?
Superior sagittal sinus → Confluence of sinuses → Transverse sinuses → Sigmoid sinuses → Jugular veins → Heart.
Which of the following arteries supply blood to the brain?
A) Internal carotid arteries
B) External carotid arteries
C) Vertebral arteries
D) A & C
D) A & C
The Circle of Willis is important because it:
A) Pumps oxygen into the brain
B) Protects the brain from infections
C) Ensures continuous blood supply even if one artery is blocked
D) Stores cerebrospinal fluid
C) Ensures continuous blood supply even if one artery is blocked
The blood-brain barrier (BBB) functions to:
A) Allow all substances to enter the brain
B) Regulate what enters the CNS
C) Remove CO2 from the bloodstream
D) Produce cerebrospinal fluid
B) Regulate what enters the CNS
The superior sagittal sinus is responsible for:
A) Carrying oxygenated blood to the cerebrum
B) Absorbing cerebrospinal fluid (CSF) and draining blood from the brain
C) Connecting the internal carotid artery to the brainstem
D) Sending blood to the lungs for oxygenation
B) Absorbing cerebrospinal fluid (CSF) and draining blood from the brain
The middle cerebral artery is significant because:
A) It is the largest artery in the body
B) It is a common site for stroke
C) It carries deoxygenated blood
D) It supplies blood to the spinal cord
B) It is a common site for stroke
