Arrange the following events that occur at a single synapse in the correct order. Assume only one action potential occurs in the presynaptic neuron, (Hint: begin with action potential in synaptic knob as #1) neurotransmitter release opening of synaptic knob Ca++ channels opening of chemically gated ion channels binding of neurotransmitter to receptors action potential in synaptic knob postsynaptic potential

Arrange the following events that occur at a single synapse in the correct order. Assume only one action potential occurs in the presynaptic neuron, (Hint: begin with action potential in synaptic knob as #1) neurotransmitter release opening of synaptic knob Ca++ channels opening of chemically gated ion channels binding of neurotransmitter to receptors action potential in synaptic knob postsynaptic potential

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Which of the following are the likely explanations for the failure of a postsynaptic neuron to trigger an action potential? Select all that apply. The EPSPs are neutralized by the neurotransmitter The summation of IPSPs and EPSPs is insufficient to depolarize the cell to threshold The synapses generating the EPSPs are too close to the axon hillock The synapses generating the EPSPs are too far from the axon hillock
If a post synaptic neuron is stimulated to threshold by spatial summation this implies that the post synaptic cell has a lower than normal threshold the postsynaptic cell has many synapses with many presynaptic neurons the post synaptic cell is getting stimulated many times during a short period of time by a single presynaptic neuron the post synaptic cell is slow to repolarize
Order the following in the correct sequence that results in generation of action potential local potential is generated at axon hillock action potential may or may not result in subsequent post synaptic neuron depending on type of neurotransmitter and receptors etc. stimulus is picked up by dendrites If the potential reaches a threshold, action potential spreads throughout the axon signal then reaches synaptic knob, which releases neurotrasmitters A Moving to another question will save this response. « < Question 51 17 étv 80 DII DD F2 F3 F4 F5 F9 F10 23 24 2 3 4 5 6 7 8. 10 R T Y S. D J K C V * CO
Rank the action potential starting from the neuron at resting state
In chemical synapses, neurons communicate with other neurons or skeletal muscles via neurotransmitters (NT). Explain the steps of neurotransmission beginning from the action potential arriving at the axon terminal to the termination of NT actions. (answer max 8 sentences)
Summation means that a post-synaptic neuron only has an action potential if: there are no IPSPs there are no EPSPs there are more IPSPs than EPSPs there are more EPSPs than IPSPs
which way does the neurotransmitter NO move
Assume a neuron is at rest and the following changes happen: Step 1: Neurotransmitter binds to an ionotropic excitatory neurotransmitter receptor causing an EPSP. Step 2: With the neurotransmitter still bound either a NAM or non-competitive antagonist bind to the allosteric site of the receptor. Answer the following questions that explains how the NAM and non-competitive antagonist would differ in their actions. 4.) A. Going from step 1 to step 2 what would happen to the ionotropic receptor (ion channel) as a result of the NAM. B. Going from step 1 to step 2 what would happen to the ionotropic receptor (ion channel) as a result of the non-competitive antagonist. C. Going from step 1 to step 2 how would membrane potential change as a result of the NAM D. Going from step 1 to step 2 how would the membrane potential change as a result of the non-competitive antagonist.
Based upon the changes in permeability seen in the trace below and your knowledge of ion distributions across a cell, predict how ion movements would change during an action potential. Drag and drop each phrase into the appropriate box on the action potential trace. Drag the appropriate labels to their respective targets. Note: not all labels will be used. ►View Available Hint(s) Sodium (Na+) ions move to the axon Sodium (Na) ions move out of the axon Less potassium (K) ions move out of the axon Potassium (K) ions move out of the axon Potassium (K¹) ions move into the axon Sodium (Na) ions stop moving in Membrane potential (mv) +30 +10 0 -10- -30 -50 -70 -90 A PNa 0 PNa 5 6 1 PK Threshold PK 2 Reset Help
With respect to the three structural types of neurons (unipolar, bipolar & multipolar): State which parts of each type of neuron receive information, which parts integrate information, and which parts conduct the output signal of the neuron. Describe the location of the cell bodies of each type of neuron within the nervous system.
Describe at least 2 processes at the synapse that shift the effect of an action potential of a pre synaptic cell on the response of a post synaptic cell.
When an impulse arrives at the synapse, the synaptic vesicles open and release neurotransmitters into the cleft within a thousandth of a second. Within another ten thousandth of a second, these molecules have diffused across the cleft and bound to receptor sites in the effector cell. In what two ways is transmission across a synapse terminated so that the neuron’s signal is concluded?