A synapse with all of these; a postsynaptic dendrite, an astrocyte end foot, and the presynaptic terminal button/bouton is called..... A. synaptic convergence B. engulfment synapse C. tripartite synapse D. receptor confluence synapse E. astrocytic engulfment
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A synapse with all of these; a postsynaptic dendrite, an astrocyte end foot, and the presynaptic terminal button/bouton is called.....
A. synaptic convergence
B. engulfment synapse
C. tripartite synapse
D. receptor confluence synapse
E. astrocytic engulfment
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- Saltatory conduction (a) requires more energy than continuous conduction (b) occurs in unmyelinated neurons (c) occurs when the action potential jumps from one node of Ranvier to the next (d) slows transmission of an impulse (e) depends on the action of GABAIn which of these ways does a metabotropic synapse differ from an ionotropic synapse? a. Its effects are slower to start and last longer. b. Its effects are faster to start and last longer. c. Its effects are slower to start and briefer in duration. d. Its effects are faster to start and briefer in duration.Saltatory conduction is a term applied to the "jumping" movement of action potentials Multiple Choice a) along the postsynaptic membrane from dendrite to axon hillock. b) along myelinated axons. c) from one neuron to another. d) in two directions at the same time. e) across electrical synapses.
- Which of these is least likely to trigger an action potential in a post-synaptic cell? A)EPSPs and IPSPs arrive simultaneously at multiple synapses. B)The other choices are equally likely to trigger an action potential. C)Single EPSPs arrive simultaneously at multiple synapses. D)Multiple EPSPs arrive rapidly at a single synapse.Post synaptic neurons membrane potentials are less negative than resting membrane potentials when this occur A. Creates a new set point for the resting membrane potential B. Has a lower propensity to produce an action potential C. Reacts by generating action potential D. Higher chance of reaching the potential thresholdWhat statement about synapse activity is false? A.The input of sodium ions by AMPA receptors is triggered by glutamate binding to the same receptors.B.Calcium entering the dendritic spine during synaptic transmission activates proteins that can potentiate synapse.C.Depolarization of the membrane caused by the arrival of calcium ions makes it possible to eject sodium blocking NMDA receptors.D.Glutamate can be released by the pre-synaptic button following the arrival of an action potential via the axon.
- certain inhaled anesthetic agents are thought to open chlorine ion channels in the membranes of postsynaptic neurons in the brain, an effect that causes IPSPs. why might this action put a person "to sleep" during anesthesia?During saltatory conduction, action potentials are generated: a. along the entire length of the unmyelinated axon. b. regardless if threshold is reached. c. when the entire axolemma is depolarized. d. only at nodes of Ranvier of myelinated axons.the bacterium clostridium tetani produce a toxin called tetanospasmin, the causative agent os the disease tetanus. the toxin prevents the release of inhibitory transmitters in the CNS and so blocks the resulting IPSPs they would normally generate. what are some of the functions of inhibitory synapses? considering this what symptoms would you expect from the disease tetanus, and why? ( hint: imagine trying to stand up if all of the muscles in your lower limb contracted at the same time.)
- Which type of synapse is better suited for vision and hearing, and why?A. Metabotropic synapses because they produce quick, brief effectsB. Metabotropic synapses because they produce longerlasting effectsC. Ionotropic synapses because they produce quick, brief effectsD. Ionotropic synapses because they produce longerlasting effectsWhat determines the effect of neurotransmitter release on the post-synaptic neurons? a. the size of the action potential. b. the post-synaptic receptors c. the neurotransmitter contained in the synaptic vesicles. d. the concentration of calcium ions reached in presynaptic terminals. e. the size of the synaptic vesicles.During the refractory period a) if a neuron reaches threshold the action potential goes to completion b) No stimulus of any strength will trigger a new action potential c) It is possible to trigger a new action potential but only with an unusually strong stimulus d) The signal grows weaker with distance e) The neuron fires at its maximum voltage if a stimulus depolarizes the neuron to threshold