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Definition
| Cells specialized for the reception of sensations |
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Definition
Cells that make the appropriate response to sensation. (Muscles or glands) |
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Definition
| The nerve supply to our gut tube and responsible for peristalsis. |
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Definition
| Run outward from the brain and spinal cord. |
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Definition
| Clusters of nerve cell bodies which are found in specific regions. |
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Term
| Composition of Central Nervous System |
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Definition
Brain and Spinal Cord. Composed of white and gray matter |
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Term
| Composition of the Peripheral Nervous System |
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Definition
Paired Nerves and Ganglia. Cranial Nerves and their Gangliai - related to the head and gills and the gut tube. Spinal Nerves and their Ganglia - related to the trunk, limbs, and to a few specific regions of the head and neck. Sympathetic chain and related structures. |
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Term
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Definition
| Myelinated axons (which appear white) running from one region to another region |
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Term
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Definition
| Clusters of nerve cell bodies; since nerve cell bodies are never myelinated this region appears to be gray. |
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Term
| Components of Spinal Cord |
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Definition
White matter on the outside, gray matter on the inside. White matter represents pathways running up the cord carrying sensory information to the brain from the regions of the body or pathways running down the cord carrying motor information from the brain to the effector organs of teh body. Upper regions of the cord have more white matter than lower regions. Amount of gray matter at a specific level of the cord is determined by the muscle mass that is innervated by that level of hte cord. (It's massive in the parts of the cord related to the extremities. |
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Definition
| The "thicker" region of teh cord related to teh upper extremities |
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Term
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Definition
| The "thicker" region related to the lower external. |
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Term
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Definition
Spinal nerves are named for the region of the trunk in which they are found. They are numbered according to the vertebrae that they emerge above (cervical) or belowe (thoracic, lumbar,and sacral) Thus there is a "gap" in this method of nomenclature between the sevent cervical vertebrae (C.V.7) and the first thoracic vertebrae (T.V.1) This gap is arbitrarily dismissed by naming the nerve in the region of the eighth cervical spinal nerve C8. (Thus, C8 is a rule/generalization breaker.) |
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Term
| Chordates and all vertebrates are the only animals to be characterized by what.... |
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Definition
1. Dorsal Hollow Nerve Tube 2. A Notochord 3. A Postanal tail 4. Gill slits The direction of blood flow is also somewhat unique; the heart is a ventral structure and blood passes anteriorly in ventral vessels and posteriorly in dorsal vessels. |
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Definition
| Paired blocks of tissue that develop into bone, muscle, and dermis. |
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Term
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Definition
| The somatic portion of the animal is the active, voluntary portion that is related to, or derived from somites. |
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Term
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Definition
| The visceral portion of the animal is the gut tube (viscera) of the animal. |
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Term
Blood Vessels (Visceral or Somatic) |
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Definition
| Blood vessels are visceral structures and they are in the outer body wall. |
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Definition
| Structures that develop from them are primarily segmented |
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Definition
| Any segmentation that is imposed on structures that are not innately segmented |
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Definition
| Divisible into rhombomeres that show a visible structural segmentation |
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Definition
| Have a segmentation at the molecular and genit level (Prosomeres). |
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Definition
| Purely sensory in function |
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Definition
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Definition
| The location of the cell bodies of the sensory neurons in the dorsal root. |
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Definition
| A cluster of nerve cell bodies in the PNS. |
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Definition
| Cluster of nerve cell bodies in the CNS. |
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Term
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Definition
| The visceral motor system of the body that is composed of sympathetic and parasympathetic divisions, and is unique in that it is a two-neuron pathway with the cell body of one neuron in the CNS (the preganglionic neuron) and the cell body of the second neuron in a ganglion in the periphery (the postganglionic neuron). |
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Term
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Definition
| Gets divided into a dorsal ramus and a ventral rami |
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Definition
| Goes only to true-back muscles and the skin over these true back muscles. |
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Term
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Definition
| Each goes to the "other" musculature and related skin of the limbs and trunk. |
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Term
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Definition
Thoracic spinal nerves. Not involved with the braiding of plexuses. Show the segmentation of the body for most of their length. |
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