### Question 3The balance between K+ ions and Na+ ions inside and outside the cell affects the resting membrane potential. If the K+ ion concentration outside the cell drops drastically, which one of these events will occur?- ○ facilitation- ○ hyperpolarization- ○ threshold- ● a and c**Explanation:**- **facilitation:** This option is selected as part of the correct answer.- **hyperpolarization:** This option is not selected.- **threshold:** This option is selected as part of the correct answer.In the given multiple-choice question, the correct answer is indicated as "a and c." This suggests that both "facilitation" and "threshold" are events that will occur if the K+ ion concentration outside the cell drops drastically.**Navigation Buttons:**- **Previous:** A button that allows the user to go back to the previous question.- **Next:** A button that allows the user to proceed to the next question. **Question:**Action potentials are generated at receptor sites. If you touch an object that is rough, which one of these structures on a sensory neuron, will be stimulated first and begin the process of sodium entry via chemically gated channels into the nerve cell? - o dendrites - o axons - o synaptic terminals - o cell body of the neuron**Navigation Options:** - Previous button labeled "Previous" - Next button labeled "Next"

The signals for senses and movements in the body are generated from the central nervous system…

Answered: Action potentials are generated at…

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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Similar questions

In neurons, the direction of signal is always: Up axon to soma (cell body) Down soma (cell body) to dendrites O Up soma (cell body) to dendrites SEP O Down axon terminal to dendrites O Down axon towards axon terminal
Of the following, which must be true for an action potential? I - Action potentials only occur when the threshold potential has been exceeded.II - A stimulus produces a full action potential, or does not produce an action potential at allIII - During the undershoot phase, it is much harder to fire another action potential I, II, and III I only I and III II and III
describe how the membrane potential varies over time AND distance as a graded potential move across the cell body of a neuron. Describe the movement of ions within the cell body as the graded potential moves away from the stimulus
Which of the following occurs when light activates a photoreceptor? Choose all that apply. Glutamate will be released The cell will be depolarized Phosphodiesterase is inactivated [Sodium ions channels will be closed CGMP is present
What drives K+ ions through voltage gated channels while funny channels are also open? O pifference in K+ concentration across the PM O pressure potential O Both difference in K+ concentration across the PM and Membrane potential (difference in charge across the membrane) O Osmotic potential O Membrane potential (difference in charge across the membrane)
part 1: What is the membrane topology of typical voltage-gated ion channels and how are they sensitive to voltage? Part 2: Explain the differences in the relative selectivity of voltage-gated Na and K channels.
How does lidocaine cause numbness when injected? destroys pain receptors repolarizes sensory axons blocks effectors from reaching threshold prevents voltage gated channels from opening
Saltatory conduction occurs on? Dendrites Cell bodies Unmyelinated axons Myelinated axons None of the above All of the above
Classify the given items with the appropriate group. Neuron is hyperpolarized Occurs when voltage-gated sodium channels have returned to resting state No amount of stimulus will initiate a second action potential Ensures that the action potential moves down the axon in only one direction Voltage-gated sodium channels are opened then closed in the inactivated state Occurs about 1 millisecond after an action potential Relative Refractory Period Absolute Refractive Period
Describe leak ion channels and gated ion channels. Howare they responsible for the permeability of a restingversus a stimulated plasma membrane?
4,5,6 and 7 if possible
The central ends of afferents from muscle spindles synapse with all the following types of neurons, except :-a- α-motor neurons of the same muscleb- γ-motor neurons of the same musclec- local interneuronsd- 2nd order neurons of ascending sensory pathways

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