BIO 152 Module 2 Exam Portage 2023

This layer of the meninges is tightly attached to the brain. Pia matar Pia mater (menix) 6/1/23, 9:55 PM Module 2 Exam - Requires Respondus LockDown Browser + Webcam: Essential Human Anatomy & Physiology II with Lab-2021-K… Question 2 3 / 3 pts Your Answer: The ______ fissure separates the cerebrum from the cerebellum. transverse Transverse Question 3 4 / 4 pts Your Answer: What is the purpose of the blood-brain barrier? Describe its maintenance from a cellular level. The blood-brain barrier is a diffusion barrier that prevents particles from entering the CNS, keeping the brain and spinal cord separated from blood circulation. The maintenance of the blood barrier is important to provide a stable chemical environment for the nervous system. The blood-brain barrier is a diffusion barrier which prevents most particles from entering the central nervous system tissue, keeping the brain and spinal cord separate from general blood circulation. The blood-brain barrier is formed by the relatively impermeable brain capillaries, due to the glial cells astrocytes. Maintenance of the blood-brain-barrier is important to provide a stable chemical environment for the nervous system.