Which ligand-gated channel directly allows for the passage of both sodium and potassium across the cell membrane when the proper ligand is bound to it? Group of answer choices Voltage-gated sodium channel Na+/K+ ATPase nicotinic acetylcholine receptor muscarinic acetylcholine receptor 1 answer

Place the following events in chronological order from 1-8: Nat enters the cell, and depolarization occurs to approximately +30 mV. The voltage across the cell membrane is -70 mV, the resting membrane potential. Upon reaching the peak of the action potential, the VG Nat channels are inactivated by the closing of their inactivation gate and the activation gate of each VG K channel opens. VG K channels close by the closing of their activation gate, and the resting membrane potential is gradually restored. An excitatory post-synaptic potential depolarizes the membrane to threshold and the activation gate of VG Nat channels open. Upon returning to the resting membrane potential, VG Na channels are reset by opening of the inactivation gate and the closing of the activation gate. VG K+ channels are slow to close, resulting in an excess of K* efflux and hyperpolarization. Depolarization occurs as K+ flows out of the cell.

Correct answer: Ligand-gated ion channel don’t open until the neurotransmitter diffuses across the synapse and binds to the receptor, The calcium channels are blocked in the presynaptic cells, It takes time for the vesicular exocytosis to occur Please explain why each of the correct answer choices are correct. Thank you.

Matching (may not use all choices; may use some choices more than once) 45. Sección Release of inhibitory neurotransmitter 46. Decreased concentration of leaky sodium channels in the membrane Arsenic poisoning prevents mitochondria from making ATP 47. 48. Extreme sodium deficiency 49. Acetylcholinesterase concentration is decreased 50. Overdose of Potassium Chloride 51. Increased concentration of leaky potassium channels in the membrane Salto de columna A. Makes RMP more negative B. Makes RMP less negative

Which of the following is NOT a weakness of the Meyer Overton theory? does not predict how temperature effects will affect neuron function by membrane expansion cannot rationalize why straight-chain alcohols lose potency after increasing their alkyl chain length beyond a cutoff length. does not explain why enantiomers of anesthetics have differing properties does not predict efficacy based on lipid/gas partition coefficient does not explain why certain hydrophobic compounds do not induce unconsciousness

Match the events listed with their order in the mechanisms behind the firing of an action potential under normal conditions (without tetrodotoxin present in the man's body).  The cell has a resting membrane potential of -65 mV. You should match these events at the initial segment of a bipolar neuron. Please note that this is a sequence question. Although not an option below, you should consider that neurotransmitters are bound to ligand-gated receptors causing EPSPs. Now, put the process in the correct sequence: **arrange from 1-10

apucreceptors ava ble at the synapse are reflected in this number. Question 2: In this chapter, we discussed a GABA-gated ion channel that is permeable to Cl. GABA also activates a G-protein-coupled receptor called the GABA receptor, which causes potassium-selective B channels to open. What effect would GABAB receptor activation have on the membrane potential? GABAB receptor activation causes potassium-selective channels to open. As a result this bringhs the

The following diagram represents a typical serotonergic synapse. Where, specifically, do antidepressants work (e.g. SSRI)? Neurotransmitter Neurotransmitter transporter Аxon Synaptic vesicle terminal Voltage- gated Ca?+ channel Synaptic cleft Receptor Postsynaptic density Dendrite Neurotransmitter Synaptic Vesicle Neurotransmitter transporter (aka Reuptake transporter) Receptor O All of the above

What proteins are responsible for the decrease of membrane potential in section 3? opening of voltage gated sodium channels opening of voltage gated potassium channels potassium leak channels opening of ligand gated sodium channels Na+/ K+/atpase

The key feature of AMPA receptors as demonstrated experimentally is Na voltage-gated channels activity inward-rectifier K* channels activity inactivation of Ca²+ channels Ca²+ and Na* permeability Ca²+ permeability