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.

Sensory neurons in the homeostatic pathway demonstrate spontaneous activity.  For a neuron, what does spontaneous activity mean? Describe a mechanism by which a neuron would demonstrate spontaneous activity. (Good inspiration would be to look at the mechanism of behavior and effect on membrane potentials of HCN channels in the heart.) Assuming these sensory neurons used FM communication, how do they encode increases in stimulation and also to encode decreases in stimulation of receptors?

Synaptic delay :-a- is the time needed for release of neurotransmitter from synaptic vesiclesb- the minimal delay time in the central nervous system is about 0.5 millisecondc- is determined by the type of the neurotransmitterd- is determined by the number of postsynaptic receptors

For this question you may use either a neuron or a skeletal muscle fiber (but not both) to answer. In words and/or figures, describe how the binding of a neurontransmitter to its receptor eventually leads to a mechanical event (neurotransmitter release or skeletal muscle contraction). In other words, describe the steps involved in either muscle contraction or nerve conduction. Remember: You may either 1) type your answer here, 2) type in a separate file and upload the file here with or without additional images or 3) write your answer on a separate sheet of paper, scan or screenshot an image of your response and upload the file here.

When a neuron reaches threshold voltage, all voltage-gated channels are triggered to make conformational changes. The order in which this happens comes down to the timing/speed/kinetics of the different gates on the channels. Put the following events in the order they occur after a neuron reaches threshold voltage. 1. Voltage-gated K+ channels finish closing their gate. 2. Voltage-gated Na+ channels open their activation gate, increasing Na+ permeability. 3. Voltage-gated Na+ channels close their inactivation gates, reducing Na+ permeability. 4. Voltage-gated K+ channels open their gate, increasing K+ permeability. 5. Voltage-gated Na+ channels reset to their original conformation.

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What will be the receptor probability of the active state after you add a high dose of an antagonist?

Plz answer correctly ASAP

compare the structures of the peptide neurotransmitters Met-enkephalin and Leu-enkephalin

Conditions: [Na+] outside = .3 mM [Na+] inside the presynaptic cell = .01 mM [dopamine] inside = .5 mM [dopamine] outside = .001 mM ΔGinward = RT ln [X] inside/[X] outside + z F Vm F = 23,000 cal/mol  V R = 1.987 cal/ mol K Membrane potential is .07 V Temperature is 273 K   Using the information above and image please answer these questions :     Is the concentration of sodium higher on the outside or the inside of the presynaptic cell?          Would the movement of sodium be active or passive moving OUT of the presynaptic cell?  SHOW your work.