BIOD 152 Module 2 Exam Questions & Answers Graded A+

Human Brain Divisions - Answer-cerebrum, brainstem, diencephalon, cerebellum What protects the brain? - Answer-skull, meninges, and BBB Ventricles of the brain - Answer-cavities within the brain filled with cerebrospinal fluid; 2 lateral, 3rd ventricle, 4th ventricle Meninges - Answer-3 layers of connective tissue that cover and protect the CNS organs and enclose CSF. Dura Mater - Answer-thick, outermost layer of the meninges surrounding and protecting the brain and spinal cord pia mater - Answer-the delicate innermost membrane enveloping the brain and spinal cord. CSF - Answer-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 - Answer-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 - Answer-largest part of the brain, 83%; includes median longitudinal fissure, left and right cerebral hemispheres, gyri, sulci, and fissures corpus callosum - Answer-A bridge of white nerve fibers that connect cerebral hemispheres Cerebral cortex - Answer-outer region of the cerebrum, containing sheets of nerve cells; gray matter of the brainDeep sulci - Answer-frontal, parietal, temporal, occipital Frontal sulci - Answer-controls higher level executive fx like reasoning and decision making; controls motor fx and control over voluntary muscle actions parietal lobe - Answer-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 - Answer-interprets visual input Temporal - Answer-sensory areas for hearing and smelling