QUESTION 9 What is the relationship between action potential conduction velocity and axonal diameter? O a. Action potential conduction velocity decreases with increasing axonal diameter O b. Action potential conduction velocity increases with decreasing axonal diameter Oc. Action potential conduction velocity increases with increasing axonal diameter O d. There is no relationship between the action potential conduction velocity and the axonal diameter QUESTION 10 The movement of what ion occurs in the rising phase of the action potential? Oa. Inward Na+ Ob. Outward K OC. Outward Na+ Od. Inward K+ QUESTION 11 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Type here to search O W

QUESTION 9 What is the relationship between action potential conduction velocity and axonal diameter? O a. Action potential conduction velocity decreases with increasing axonal diameter O b. Action potential conduction velocity increases with decreasing axonal diameter Oc. Action potential conduction velocity increases with increasing axonal diameter O d. There is no relationship between the action potential conduction velocity and the axonal diameter QUESTION 10 The movement of what ion occurs in the rising phase of the action potential? Oa. Inward Na+ Ob. Outward K OC. Outward Na+ Od. Inward K+ QUESTION 11 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Type here to search O W

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter39: Information Flow And The Neuron

Section: Chapter Questions

Problem 5TYK: The major role of the Na+/K+ pump is to: a. cause a rapid firing of the action potential so the...

See similar textbooks

Similar questions

Figure 35.11 Potassium channel blockers, such as amiodarone and procainamide, which are used to treat abnormal electrical activity in the heart, called cardiac dysrhythmia, impede the movement of K+ through voltage-gated K+ channels. Which part of the action potential would you expect potassium channels to affect?
In the propagation of a nerve impulse: a. the refractory period begins as the K+ channel opens, allowing K+ ions to flow outward along their concentrationgradient. b. Na+ ions flow out of the axon with their concentration gradient. c. positive charges lower the membrane potential to its lowestaction potential. d. gated K+ channels open at the same time as the activationgate of Na+ channels closes. e. the depolarizing stimulus lowers the membrane potential toopen the Na+ gates.
Action potentials occur when ______. a. potassium gates close b. a stimulus pushes membrane potential to threshold c. sodium-potassium pumps become active d. neurotransmitter is reabsorbed
Excericse affects your heart rate. Then describe how the action potential graph would change due to this situation( excercise ) . Discuss repolarization / hyperpolarization, and the time between action potential peaks.
a) How does a CAP differ from a single action potential? b) Action potentials are said to be all or none responses. Why does the frog sciatic nerve give a graded response?
What happens when a resting neuron’s membranedepolarizes?(A) There is a net diffusion of Na+out of the cell.(B) The equilibrium potential for K+(EK) becomesmore positive.(C) The neuron’s membrane voltage becomesmore positive.(D) The cell’s inside is more negative than the outside
1. If you block calcium channels on an axon, which will not occur? A) exocytosis of neurotransmitter B) repolarization phase of the action potential C) depolarization phase of the action potential D) hyperpolarization phase of the action potential E) graded potential
A change in the voltage across a neuron’s plasma membranethat makes the neuron less likely to fire an action potential isa. a change that makes the resting potential less negative.b. an excitatory postsynaptic potential.c. an inhibitory postsynaptic potential.d. a change that lowers the threshold.
In SA nodal cells the upstroke of the action potential:A)is characterized by a substantial overshoot component.B)results from rapid inward movement of Na+.C)results from inward movement of Ca2+D)results from inward movement of K+.
During an action potential, what do the transient changes in membrane e permeability allow?
A muscle cell contains acetylcholine receptors that act as ligand-gated cation channels,and it also contains voltage-gated Na+ channels of the type found in neurons. Intheory, could a muscle cell get away with having only acetylcholine-gated cationchannels, which would serve the dual purpose of receiving neurotransmitter signalsand propagating action potentials? Why or why not?
5. The falling phase of the action potential due to the: A. Entry of sodium ions B. Exiting of sodium ions C. Entry of potassium ions D. Exiting of potassium ions