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- Neurons a. How does the neuron re-establish its resting membrane potential after an action potential? -Sodium (Na+) gated channels close -Sodium (Na+) gated channels open -Potassium (K+) and sodium (Na+) gated channels close -Sodium/ potassium pumps (Na+/K+ pumps) exchange ions b.Which of the ion channels utilizes a passive transport system (in other words, do not require ATP)? Mark all that apply. -K+ leak channels -K+ channels (gates) -Na+ leak channels -Na+ channels (gates) -Na+/K+ pumps c.The absolute refractory period occurs when the neuron is undergoing the action potential and implies it cannot be further stimulated. True or False d. After an action potential, as the neuron repolarizes, the resting membrane potential is immediately re-established True or False e.Match the type of gate or process with its overall effect on the neuron So Match each term with the best-fit description. Terms: Na+/K+ pump K+ voltage gate Resting membrane potential Hyperpolarization Na+ voltage gate…Please ASAP. Thanku. Question 24 At the equilibrium potential for Na+, which of the following is true? Na+ channels are closed There is no net movement of Na+ Na+ current is inward K+ current is inwardPlease ASAP. Thanku. Question 15 If Na+ channels are blocked by lidocaine (sodium channel blocker), what happens to the equilibrium potential for Na+? Becomes more positive Becomes more negative Does not change
- Frog poison. Batrachotoxin (BTX) is a steroidal alkaloid from the skin of Phyllobates terribilis, a poisonous Colombian frog (the source of the poison used on blowgun darts). In the presence of BTX, Na+Na* channels in an excised patch stay persistently open when the membrane is depolarized. They close when the membrane is repolarized. Which transition is blocked by BTX?Question. Explain the signal transduction mechanism for slow ligand-gated ion channels.Please ASAP. Thanku If one increased the extracellular concentration of K+, what would happen to the membrane potential? Cannot predict becomes more negative No change becomes more positive
- Please ASAP. Thankyou. Question 10 A hypothetical cation has a Nernst potential of -30 mV. At 0 mV, the cation flows in which direction? Into the cell Out of the Cell It does not flowPlease ASAp. Thankyou. Question 4 The resting membrane potential is a negative value because of: a. High K+ inside of cells compared to the outside b. Open K+ channels at rest c. Phospholipid head groups on the inside of the membrane d, High sodium outside the cellPlease asap. Thankyou. Question 8 If the concentration of Na+ inside of a cell increases, the Nernst potential for Na+ will do what? Become more positive Become more negative Not change Not sure
- Plesae ASAP. thanku Which of the following is not true about the glutamate family of ligand-gated ion channels? a. members are AMPA, kinase, and NMDA channels b. they are cation permable c. channels subunits have 3 full transmembrane doamins d. they require 5 subunits to amke a functional channelMultiple Choice. Imagine a solution containing only water, sodium, and glucose. If a voltage is applied to the solution, glucose would move: (a) There would be no net movement of glucose (b) In the opposite direction of sodium (c) In the same direction and speed as sodium (d) In the same direction as sodium, but slower. (e) In the same direction as sodium, but faster.Part C-Comparing and Contrasting the Two Types of Voltage-Gated lon Channels Sort the phrases into the appropriate bins depending on whether they describe similarities or differences between voltage-gated K* channels and voltage-gated Na+ channels. > View Available Hint(s) Reset Help The polarity of the substances they transport across the membrane The direction of ion movement The stimulus that triggers opening through the channel The placement of the channel protein relative to the membrane The inactivation mechanism Similarities Differences