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Anatomy week 13
| Question | Answer |
|---|---|
| The ventral rami of most spinal nerves subdivide to form complex networks called | plexuses |
| The enteric nervous system is made up of a complex network of nerve plexuses that control the visceral effectors in the | intestinal wall |
| The large fluid-filled spaces within the brain are called the | ventricle |
| Spinal cord tracts provide conduction paths to and from the brain. The tracts that conduct sensory impulses down the cord from the brain are called _____ tracts. | descending |
| Dendrites and cell bodies of sympathetic preganglionic neurons are located in the | gray matter of the thoracic and upper lumbar segments of the spinal cord. |
| superior constrictor | constricts the upper portion of the pharyngeal lumen as a sphincter. |
| Middle Constrictor | acts as a sphincter when contracted. |
| Inferior Constrictor | draws the lower portion of the pharynx forward and pulls the lateral walls of the lower pharynx forward and inward. |
| Cardiac output is determined by | stroke volume and heart rate |
| The term used to describe the collection of mechanisms that influence the circulation of blood is: | Hemodynamics |
| Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of | vasodilation |
| Which two factors promote the return of venous blood to the heart? | blood-pumping action of respirations and skeletal muscle contractions |
| are ascending spinal cord tracts motor or sensory? | sensory |
| are descending spinal cord tracts motor or sensory? | motor |
| are sensory neurons afferent or efferent? | afferent |
| are motor neurons afferent or efferent? | efferent |
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