Place the steps in the propagation of nerve impulses in the correct order.
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- A _______________ is a drug that causes temporary paralysis by blocking the transmis- sion of nerve stimuli to the muscles. neuromuscular blocker skeletal muscle relaxantAction potentials occur when ______. a. potassium gates close b. a stimulus pushes membrane potential to threshold c. sodium-potassium pumps become active d. neurotransmitter is reabsorbedWhat membrane protein of the neuron is responsible for briefly increasing the Na+ permeability of the membrane during the rising phase of the nerve impulse? the sodium-potassium pump the voltage gated potassium channel the voltage gated sodium channel the stimulus gated sodium channel the ligand gated ion channels
- Fill in the blank: When sodium ions are actively transported outward through a nerve cell membrane, _______________________ions are transported inward.During a typical action potential in a nerve, which of the following is happening? Multiple choices A. Voltage gated K+ channels are allowing for influx of potassium B. All of these are happening C. Na/K pumps are pumping Na+ in and K+ out D. Voltage gated Na+ channels are allowing for efflux of sodium E. Leak K+ current, with K+ exiting the nerveWhich of the following is FALSE about action potentials? At resting potential, there are more potassium channels open and most sodium channels are closed. Depolarization is due to the flow of Na+ out of the axon via voltage-gated Na+ channels. Hyperpolarization is due to continued loss of K+ from the axon. During repolarization, K+ flows out of the axon along its concentration gradient. Resting membrane potential is primarily established by the Na+/K+ pump.
- please answer the question regarding nervous system - (a) How nerve impulse travels at synapse. Name all chemicals involved? (b) Both the nervous system and endocrine system respond to stress. Explain the benefits of each system's response. asap please.Describe the 6 step sequence of events that occurs at the NMJ in response to a nerve Action Potential.Refer to the graph showing the course of an action potential. Which of the numbered points along the graph represent the time when voltage-gated potassium channels are first activated? a) 1 b) 2 c) 3 d) 4 e) 5
- An influx of positive sodium ions causes opening of the activation gates of voltage regulated sodium channels resulting in a further influx of positive sodium ions, and thus the initial stages of an action potential are regulated by ______ feedback.What causes Hyperpolarization following the spike of the action potential? Voltage-gated K+ channels close slowly allowing K+ ions to leave the cell The opening of leaky Na+ channels The Na+/K+ pump briefly reverses the direction of ion flow Both Na+ channels and K+ channels become inactivated Na+ and Cl- enter the cell until the Na+/Cl- pump closesare these True or False? Receptors on the post-synaptic cell membrane that bind the acetylcholine are voltage-gated channels (channels that open in response to a change in the electrical charge of the membrane). When a muscle cell is not contracting its cell membrane is negative on the inner surface. The effect of a neurotransmitter on the muscle cell membrane is to modify its ion permeability properties temporarily.
