BIOD 152 Module 2 Exam with 100% correct answers

Human Brain Divisions cerebrum, brainstem, diencephalon, cerebellum What protects the brain? skull, meninges, and BBB Ventricles of the brain cavities within the brain filled with cerebrospinal fluid; 2 lateral, 3rd ventricle, 4th ventricle Meninges 3 layers of connective tissue that cover and protect the CNS organs and enclose CSF. Dura Mater thick, outermost layer of the meninges surrounding and protecting the brain and spinal cord pia mater the delicate innermost membrane enveloping the brain and spinal cord. CSF special fluid formed in walls of ventricles from blood plasma by permeating through the choroid plexus; cushions the brain and spinal cord by providing buoyancy, allowing the brain to float. BBB diffusion barrier that prevents most particles from entering CNS tissue; brain and spinal cord separate from general blood circulation. Formed by impermeable brain capillaries, due to astrocytes due to need for stable chemical environment. Cerebrum largest part of the brain, 83%; includes median longitudinal fissure, left and right cerebral hemispheres, gyri, sulci, and fissures corpus callosum A bridge of white nerve fibers that connect cerebral hemispheres Cerebral cortex outer region of the cerebrum, containing sheets of nerve cells; gray matter of the brain Deep sulci frontal, parietal, temporal, occipital Frontal sulci controls higher level executive fx like reasoning and decision making; controls motor fx and control over voluntary muscle actions parietal lobe A region of the cerebral cortex whose functions include processing information about touch; receive sensory info from receptors in mouth for taste and in skn four touch, pain, and pressure. Occipital interprets visual input Temporal sensory areas for hearing and smelling Association areas act mainly to integrate more than 1 type of sensory info for purposeful action