Synapse schematic drawing

A synapse is formed where the axon terminal makes an interface with a patch of cell membrane on a dendrite or cell body of another neuron. A schematic drawing of a... 

Figure 21.1 A schematic drawing of a synapse. The synaptic terminal is shown activated. Synaptic vesicles are fusing with the presynaptic membrane and releasing a neurotransmitter that diffuses across the synaptic cleft and binds to receptors on the postsynaptic membrane. This triggers a new nerve impulse. (Redrawn from D. Voet and J. G. Voet, Biochemistry, 3rd edn, 2004. Donald and Judith G. Voet. Reprinted with permission of John Wiley and Sons, Inc.)...

Fig. 1. Schematic drawing of the cholinergic neurotransmission. In case of ganglionic and neuro-muscular synapses, the receptor is of the nicotinic, sodium channel-coupled type, in case of synapses at the parasympathetic target organs, the receptor is of the muscarinic, G-protein-coupled type. The predominant ehinination pathway of the transmitter acetylcholine...

Fig. 3. Schematic drawing of an adrenergic synapse. Nerve activity releases the endogenous neurotransmitter noradrenaline...

Figure 30-10 (A) Schematic drawing of a synapse. (B) Electron micrograph showing the synaptic junctions in the basal part (pedicle) of a retinal cone cell of a monkey.403 Each pedicle contains synaptic contacts with 12 triads, each made up of processes from a bipolar cell center that carries the principal output signal and processes from two horizontal cells that also synapse with other cones. A ribbon structure within the pedicle is characteristic of these synapses. Note the numerous synaptic vesicles in the pedicle, some arranged around the ribbon, the synaptic clefts, and the characteristic thickening of the membranes surrounding the cleft (below the ribbons). Micrograph courtesy of John Dowling.

Fig. 1. Schematic drawing of hippocampus and slice preparation. (A) Dorsal view of the ventricular surface of the rat hippocampal formation, exposed by removing the neocortex. The hatched bar represents the approximate orientation for slicing. (B) Drawing of isolated hippocampal slice, cut in a near-saggital plane as shown in (A). SUB subiculum CAl, CAS region of small and large pyramids, respectively, from nomenclature of Lorente de No (1934) AD area dentata, containing the granule cell layer FISS hippocampal fissure, PP perforant path input to the granule cells, which send mossy-fiber axons (MF) that synapse on the apical dendrites of CAS pyramidal cells SR stratum radiatum, which includes the Schaffer collateral axons of the CAS pyramids SO stratum oriens, which also contains fibers afferent to pyramidal neurons. The alveus consists mainly of CAl pyramidal cell axons. (From Dingledine et al, 1980.)...

A schematic drawing of a synapse with chemical transmission is given in Figure lA. A synaptic cleft of 200-500 A separates the presynaptic membrane pstri) of the axon from the subsynaptic membrane (55m) of the innervated cdL In the nerve ending we observe mitochondria (m) and, near the presynaptic mon-brane, clusters of synaptic vesicles (sv) of 400-500 A diameter. The vesicles are thought to contain the transmitter in a concentration isotonic with that of blood (0 11-0 ISM). In cholinergic synapses each vesicle contains a few thousand ACh molecules. 

Figure 16.3. Schematic drawing of the preparation used for the adult leg reflex response. The fly is decapitated and the femur of the middle leg is immobilized. The tibia is rhythmically flexed by attachment to a movement generator (speaker) at a set frequency (e.g., 2 Hz). Myogram recordings are made from the tibial extensor muscle the reference electrode is placed in the thorax. A cartoon of a typical recording session is shown. (Inset) Neural circuit underlying the resistance reflex. The sensory neurons of the chordotonal organ (flexion Sn) synapse on the motor neuron (Mn), which in turn synapse on the tibial extensor muscle.

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