Chapter 11 Nervous System A
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jrkjlove Plus on November 7, 2011
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44 terms
Terms | Definitions |
|---|---|
 central nervous system | The______consists of the brain and spinal cord. |
| brain | The______is the largest and most complex part of the nervous system |
| cerebral hemispheres | The brain includes two______, the diencephalon, the brainstem, and the cerebellum. |
| diencephalon | The brain includes two cerebral hemispheres, the______, the brainstem, and the cerebellum. |
| brainstem | The brain includes two cerebral hemispheres, the diencephalon, the______, and the cerebellum. |
| cerebellum | The brain includes two cerebral hemispheres, the diencephalon, the brainstem, and the______. |
| brainstem | The______connects the brain and spinal cord and allows two-way communication between them. |
| spinal cord | The______provides two-way communication between the central nervous system and the peripheral nervous system. |
| cranial cavity, vertebral canal | The brain lies within the______of the skull and the spinal cord occupies the______. |
| meninges | ______are located between the bone and the soft tissues of the nervous system and protect the brain and spinal cord. |
| meninges | The______have three layers. |
| dura mater | The outermost layer is the______and is composed of tough, white, dense connective tissue. |
| dura mater | Dural sinuses are channels in______. |
| pia mater | Denticulate ligaments are bands of______that attach spinal cord to dura mater. |
| epidural space | The______is between the dural sheath and the bony walls of the spinal cord and contains blood vessels. |
| arachnoid mater | The______is thin, weblike membrane that lacks blood vessels and is located between the dura and pia maters. |
| subarachnoid space | The______is between the arachnoid mater and pia mater and contains a fluid called cerebrospinal fluid. |
| pia mater | The______is very thin and contains many nerves and blood vessels. |
| pia mater | The______is attached to the surfaces of the brain and spinal cord. |
| ventricles | ______are interconnected cavities and are located within the cerebral hemispheres and brain stem. |
| central canal | The ventricles are continuous with the______of the spinal cord and are filled with cerebrospinal fluid. |
| lateral ventricles | The largest ventricles are the______which are located in the cerebral hemispheres. |
| third ventricle | The______is located in the midline of the brain beneath the corpus callosum. |
| fourth ventricle | The______is located in the brainstem just in front of the cerebellum. |
| cerebral aqueduct | The______is a connection between the third and fourth ventricles. |
| choroids plexus | The______is a specialized mass of capillaries and functions to secrete cerebrospinal fluid. |
| lateral ventricles | Most of the cerebrospinal fluid arises in the______and circulates into the third ventricle, fourth ventricle, the central canal of the spinal cord, and the subarachnoid space. |
| cerebrospinal fluid | ______is continuously absorbed into the blood. |
| arachnoid granulations | ______are tiny, fingerlike structures that project from the subarachnoid space into the dural sinuses. |
| cerebrospinal fluid | ______is different from blood in that it contains a greater concentration of sodium and lesser concentrations of glucose and potassium. |
| ionic concentration | The functions of cerebrospinal fluid are to help maintain a stable______in the CNS, and provide a pathway to the blood for wastes. |
| cerebrospinal fluid | Because______completely surrounds the brain and spinal cord, it protects them by absorbing forces that might otherwise jar and damage them. |
| multipolar neurons | The brain includes about one hundred billion______and countless branches of the axons (nerve fibers) by which these neurons communicate with each other. |
| dura mater | The______contains many blood vessels and nerves. |
| dura mater | The______attaches to the inside of the cranial cavity and forms the internal periosteum of the surrounding skull bones. |
| dura mater | In some regions, the______extends inward between lobes of the brain and forms supportive protective partitions. |
| dura mater | In some regions, the______splits into two layers, forming channels called dural sinuses. |
| dural sinuses | Venous blood flows through the______as it returns from the brain to vessels leading to the heart. |
| dural sheath | The______terminates as a blind sac at the level of the second sacral vertebrae, below the end of the spinal cord. |
| epidural space | The______contains blood vessels, loose connective tissue, and adipose tissue that pad the spinal cord. |
| arachnoid mater | The______spreads over the brain and spinal cord but generally does not dip into the grooves and depressions of their surfaces. |
| arachnoid mater | Many thin strands extend from the______undersurface and are attached to the pia mater. |
| pia mater | The______follows the contours of the brain and spinal cord contours, passing over the high areas and dipping into the depressions. |
| interventricular foramen | The third ventricle communicates with the lateral ventricle through the______. |
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