Portage Learning Anatomy & Physiology 2: Module 2 Exam

This layer of the meninges is tightly attached to the brain. - Answer- Pia mater (menix) The _______ fissure separates the right and left cerebral hemispheres. - Answer- Median longitudinal What is the purpose of the blood-brain barrier? Describe its maintenance from a cellular level. - Answer- 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. All the following are functions of the hypothalamus except: - Answer- A. Maintain homeostasis B. Controls the pituitary gland C. Links the nervous and endocrine systems D. Correct! Relays sensory impulses to the cerebrum What is the largest portion of the brain? - Answer- A. Cerebellum B. Correct! Cerebrum C. Corpus collosum D. Cingulate gyrus This region of the brain acts to coordinate multiple sources of sensory information. - Answer- A. Primary sensory cortex B. Primary motor cortex C. Correct! Association area D. Precentral gyrus E. Postcentral gyrus A patient is having difficulty understanding language but is still able to speak fluently. The patient's dermatomes are intact. Which area of the brain is most likely damaged? - Answer- A. Broca's area B. Correct! Wernicke's area C. Occipital lobe D. Parietal lobe E. Primary sensory cortex Describe how memories are stored and retrieved in the brain. Include a specific brain region. - Answer- Memories are not stored in one specific area within the brain but instead are stored throughout the cerebral hemispheres. The hippocampus acts as a memory center to help with memory storage and retrieval. The involvement of the limbic system explains why emotionally charged events result in our most vivid memories.