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STACK #2 FINAL EXAM
STACK ASSIGNMENT #2 PRE-FINAL EXAM WK 13
| peripheral nervous system (PNS) | consists of the nerve tissues that lie in the periphery, or “outer regions,” of the nervous system. |
| somatic nervous system (SNS) | regulates the somatic effectors, which are the skeletal muscles. The motor pathways that directly control the skeletal muscles make up the somatic motor division. |
| enteric nervous system (ENS) | so-called “second brain” in the wall of the gut. The term enteric means “intestinal,” so you can think of this system as the “intestinal nervous system.” |
| Neurons | excitable cells that conduct the impulses that make possible all nervous system functions. In other words, they form the “wiring” of the nervous system’s information circuits. |
| Glia | glial cells, do not usually conduct information themselves but support the function of neurons in various ways. |
| Autonomic nervous system (ANS) | (1) Sympathetic division—prepares the body to deal with imme-diate threats “fight-or-flight” response (2) Parasympathetic division—coordinates the body’s normal resting activities “rest-and-repair” |
| Flow of cerebrospinal fluid (CSF) | lows inferiorly through the lateral ventricles, interven-tricular foramen, third ventricle, cerebral aqueduct, fourth ventricle, and subarachnoid space and to the blood |
| gray commissure. | The left and right gray columns are joined in the middle by a band called the gray commissure. It is through the gray commissure that the central canal carries CSF through the spinal cord. |
| Proencephalon (forebrain) | Telencephalon Diencephalon Cerebrum Diencephalon Lateral ventricles Third ventricle |
| Mesencephalon (midbrain) | Mesencephalon Midbrain Cerebral aqueduct (of Sylvius) |
| Rhombencephalon (hindbrain) | Metencephalon Myelencephalon Pons Cerebellum Medulla oblongata Fourth ventricle |