week 2 -protection of the brain

Question 1

Describe how meninges protect the CNS

Answer 1

meninges protect the CNS by Covering and protecting the CNS. it also Protects blood vessels and encloses venous sinuses Containing cerebrospinal fluid (CSF) that form partitions within the skull

Question 2

Describe how cerebrospinal fluid protects the CNS

Answer 2

Forms a liquid cushion to the CNS organs
Nourishes the brain and carries chemical signals throughout it

Question 3

describe how blood-brain barrier protects the CNS

Answer 3

blood-brain barrier protects the CNS by Maintaining a stable environment in the brain it restricts the passage of large molecules and bacteria into the CSF which allows the diffusion of small molecules (O2, hormones, CO2, glucose, amino acids, electrolytes). Alcohol, nicotine, anesthetics can pass through the BBB