Term
|
Definition
| functional connection between axon of a neuron and dendrite or cell body of another neuron or membrane of another cell type |
|
|
Term
|
Definition
| (efferent) message always runs in one direction; one-way conduction; Impulse travels from dendrite to cell body to axon |
|
|
Term
|
Definition
| (afferent) neurons that transmit impulses from receptors to the central nervous sytem |
|
|
Term
|
Definition
| (internuncial) neuron between a sensory and a motor neuron |
|
|
Term
| Sensory, integrative, and motor |
|
Definition
| list 3 functions of the nervous system |
|
|
Term
| central nervous system; peripheral nervous system |
|
Definition
| two main parts of the nervous sytem are: |
|
|
Term
|
Definition
| axon terminals of the first nerve, before the synapse |
|
|
Term
|
Definition
| dendrite of the second nerve |
|
|
Term
|
Definition
| neuroglial cells in the PNS; surround axon of a peripheral neuron; form neurilemma and myelin sheath |
|
|
Term
|
Definition
| star-shaped neuroglial cells of the CNS; provide structural support for nerve tissue |
|
|
Term
|
Definition
| occur in rows along nerve fibers; provide insulating myelin sheaths in CNS around axons, but do not form neurilemma (neuroglial cells) |
|
|
Term
|
Definition
| phagocytic cells of the CNS (neuroglial); eat bacteria and cellular debris |
|
|
Term
|
Definition
| cuboidal or columnar cells; may have cilia; lines ventricals and cavities of the brain and central canal of cord, forms choroid plexus. (neuroglial cells of the CNS) |
|
|
Term
| resting membrane potential |
|
Definition
| the difference in electrical charge between the inside and the outside of an undisturbed nerve cell membrane |
|
|
Term
|
Definition
| least stimulus necessary to excite receptor; may be a combination of subthreshold impulses, i.e. summation - a second impulse arrives before the 1st one finishes, and the combination causes the threshold potential to be reached |
|
|
Term
|
Definition
| when threshold potential is reached, electrical changes cause the channels for sodium to open which causes depolarization (an action occurs) |
|
|
Term
|
Definition
| the weakest stimulus that will excite the receptor |
|
|
Term
|
Definition
| once depolarization happens, it will sweep through the whole nerve |
|
|
Term
All or nothing response;
Electrical Changes;
Impulse speed depends on size of fibers (larger fibers = faster);
absolute refractory period |
|
Definition
| list 4 facts about conductivity |
|
|
Term
| EPSP - Excitatory postsynaptic potential |
|
Definition
| How a nerve can become excited: increase postsynaptic permeability to Na (an enormous amount of Na being avail. makes depolarization easier) |
|
|
Term
| IPSP - inhibitory postsynaptic potential |
|
Definition
| how a nerve can be inhibited: make postsynaptic membrane more permeable to K and Cl (K moves out of cell, Cl moves in; inside of cell is very negative == hyperpolarized) |
|
|
Term
| Acetylcholine (Ach); Norepinephrine (NE); Epinephrine (E); Dopamine (DA) |
|
Definition
| Name 4 chemicals that excite. |
|
|
Term
| glutamic acid and aspartic acid |
|
Definition
| 2 amino acids that excite |
|
|
Term
|
Definition
| a chem. and two amino acids that inhibit |
|
|
Term
1)sensory neuron;
2)at the dorsal ganglion;
3)the efferent axon enters the cord;
4)synapses w/a dendrite;
5)motor axon exits the ventral root |
|
Definition
|
|
Term
|
Definition
| is a nerve pathway consisting of sensory neurons |
|
|
Term
|
Definition
| removing CSF from the subarachnoid space of the meninges in the spinal cord |
|
|
Term
|
Definition
| anesthesia of the lower half of the body; caused by injury to the spinal cord or by injecting anesthesia (subarachnoid space) |
|
|
Term
|
Definition
| CSF collects in the ventricles of the brain due to blockage ("water on the brain"); head gets larger while brain gets smaller |
|
|
Term
|
Definition
| either of 2 ventricles on either side of hemisphere |
|
|
Term
|
Definition
| opening connects 3rd ventricle in diencephalon to lateral ventricle |
|
|
Term
|
Definition
| in midline of brain, beneath the corpus callosum |
|
|
Term
|
Definition
| in brainstem; just anterior to cerebellum |
|
|
Term
|
Definition
| Mass of specialized capillaries that secretes cerebrospinal fluid into a brain ventricle |
|
|
Term
|
Definition
| a narrow canal that connects 4th to the 3rd ventricle and passes lengthwise through the brainstem |
|
|
Term
1) lateral ventricles;
2) interventricular foramen;
3) third ventricle;
4) cerebral aqueduct;
5) 4th ventricle;
6) foramen;
7) subarachnoid space;
8) arachnoid granulations;
9) blood filled dural space |
|
Definition
| List the flow and formation of CSF |
|
|
