Answered: Which of the following changes to an…

Which of the following changes to an action potential indicates a larger stimulus? a. Increased frequency b. Increased wavelength c. Increased amplitude d. Increased speed

Body Structures & Functions Updated

13th Edition

ISBN:9780357191606

Author:Scott

Publisher:Scott

Chapter9: Peripheral And Autonomic Nervous System

Section: Chapter Questions

Problem 1RQ

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

Question

Which of the following changes to an action potential indicates a larger stimulus?

a. Increased frequency

b. Increased wavelength

c. Increased amplitude

d. Increased speed

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Saltatory conduction (a) requires more energy than continuous conduction (b) occurs in unmyelinated neurons (c) occurs when the action potential jumps from one node of Ranvier to the next (d) slows transmission of an impulse (e) depends on the action of GABA
As the strength of a depolarizing stimulus to an axon is increased, a. the amplitude of action potentials increases. b. the duration of action potentials increases. c. the speed with which action potentials are conducted increases. d. the frequency with which action potentials are produced increases.
When a very strong stimulus initiates an action potential, the response is: I. a longer-duration action potential II. a higher amplitude action potential III. an increased rate of action potentials I and II OI and III II and III || a longer-duration action potential
During a relative refractory period of an action potential A. Another action potential can be fired, it just takes a greater stimulus for the membrane potential to reach threshold B. Na+ channels are either already open or are inactivated therefore the membrane absolutely can not produce another action potential, no matter how intense the stimulus C. Ca++ flows out of the cell, causing hyperpolarization and a need for a greater stimulus to generate the action potential D. The presynaptic neuron "tells" the postsynaptic neuron about the "relative" strength of signal E. None of the above are correct
A specific stimulus produces a receptor potential by :-a- inhibiting Na + influx into receptorb- inhibiting K + efflux from receptorc- enhancing Na + influx into receptord- enhancing K + efflux from receptor
During the action potential, which of the following activity is LIKELY to occur? Select one: a. Na+ channels open at the beginning of the action potential, and Na+ moves into the axon b. Na+ channel passages become smaller and get retracted at the beginning of the action potential c. Na+ channels are less active and static throughout the action potential process d. less Na+ is pumped to the axon when the action potential is triggered
Describe the passage of information through the nervous system using a specific example. Be sure to include in detail: A. The collection of stimuli at the sense organ and receptors involved as well as graded potential. B. The passing of the impulse along ascending pathways C. Location in the brain that processes the information D. Sending out motor information from brain E. The passing of the impulse down descending pathways F. Response by a skeletal muscle
Determine whether each statement is true or false. If a statement is false, explain why. A. Voltage gated sodium channels are quick to open and slow to close, while voltage gated potassium channels are quick to open and slow to close. 6. Before a second action potential can be generated, the concentration of sodium and potassium on either side of the cell membrane must be fully restored. C. The strength of an action potential is represented by the amplitude of the wave. A stronger stimulus will generate an action potential with a higher peak than a weaker stimulus. D.. Action potentials travel in a non-decremental manner down the axon, with the voltage constantly being regenerated along the way, unlike graded potentials which quickly diminish over short distances. E. Contiguous conduction is faster than saltatory conduction. F. Action potentials originate in the axon hillock and travel down the axon to the terminal boutons (pre-synaptic axon terminals).
Post synaptic neurons membrane potentials are less negative than resting membrane potentials when this occur A. Creates a new set point for the resting membrane potential B. Has a lower propensity to produce an action potential C. Reacts by generating action potential D. Higher chance of reaching the potential threshold
Which type of synapse is better suited for vision and hearing, and why?A. Metabotropic synapses because they produce quick, brief effectsB. Metabotropic synapses because they produce longerlasting effectsC. Ionotropic synapses because they produce quick, brief effectsD. Ionotropic synapses because they produce longerlasting effects
Which of these terms is correctly matched with its definition ordescription?a. depolarization: membrane potential becomes more negativeb. hyperpolarization: membrane potential becomes more negativec. hypopolarization: membrane potential becomes more negative
What is/are true statements about Action Potentials? Select all that apply. Group of answer choices: A. action potentials propagate down axons B. information is coded through the frequency of action potentials C. action potentials are slower in myelinated axons D. action potentials vary depending on the strength of the stimulus