BIOD 152 Module 2 Exam 2 100% Questions and Answers

BIOD 152 Module 2 Exam 2 100% Questions and Answers This is the most superficial layer of the brain meninges - Dura Mater (Menix) This layer of the meninges is tightly attached to the brain. - Pia mater (Menix) The _______ fissure separates the right and left cerebral hemispheres. - median The ______ fissure separates the cerebrum from the cerebellum. - Transverse Describe the function of the brain ventricles. - There are four ventricles in the interior of the brain, chambers filled with cerebrospinal fluid which is produced there. Once formed the CSF circulates through the ventricles and into the subarachnoid space bathing and floating the brain. What is the purpose of the blood-brain barrier? Describe its maintenance from a cellular level. - 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: - Relays sensory impulses to the cerebrum This ventricle is located anterior to the cerebellum. - fourth What is the largest portion of the brain? - Cerebrum This region of the brain acts to coordinate multiple sources of sensory information. - Association area This region of the brain controls decision making skills - Frontal lobe A patient is having difficulty understanding language but is sill able to speak fluently. The patient's dermatomes are intact. Which area of the brain is most likely damaged? - Wernicke's area A patient is having difficulty producing speech sounds, but other motor movements are normal. Which area of the brain is most likely damaged? - Broca's area Describe how memories are stored and retrieved in the brain. Include a specific brain region. - Memories 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. What is muscle tone and how is it maintained? - Muscle tone is the degree at which muscles remain partially contracted while at rest. Muscle tone is continuously monitored and maintained by the cerebellum to keep bones and joints in place. Which statement is false concerning the brainstem? - The midbrain helps regulate breathing Which of the following is true concerning the cerebellum? - The anterior lobe receives information from the body trunk. Which is most likely a symptom of ALS? - Impaired ability to swallow Which of the following is true concerning a CVA? - A hemorrhagic stroke is due to a broken blood vessel.