Which of the Following Statements About Action Potentials Is Correct

A supra-threshold stimulus can stimulate an action potential during the absolute refractory period. They are propagated down the length of the dendrite.

Propagated Action Potential Is The Nerve Impulse Teaching Biology Medical School Studying Human Anatomy And Physiology

The rising phase of action potential in cardiac autorhythmic cells is due to a rising in Ca.

. III Action potentials move faster in myelinated axons. Gradients for sodium potassium and chloride 2 the electrical gradient across the. D Movement of ions during the action potential occurs mostly through the sodium pump.

What are the non-classical synapses in the ANS called. The resting membrane potential of a neuron is determined by 1 the concentration. The plateau phase of the action potential in cardiac contractile cells is due to a.

They are identical in duration. All of the following statements are correct with respect to chemical synapses EXCEPT A. A Action potentials for a given neuron vary in magnitude.

II Action potentials move faster in axons lacking potassium ion channels. I Action potentials move faster in larger diameter axons. Action potentials generally propagate from the axon terminal toward the initial segment.

The rate of propagation of an action potential down an axon is independent of stimulus strength. C Action potentials are propagated down the length of the axon. Bthe rising phase of action potential in cardiac autorhythmic in cardiac contractile cells is due to a rapid Na influx.

Which of the following statements concerning action potentials in the heart is correct. Action potentials occur in both the central nervous system and the peripheral nervous system. See answers 1 2 mterzic1 Asked 10282017.

Up to 256 cash back which of the following statements concerning action potentials in the heart is correct. B Action potentials for a given neuron vary in duration. They are identical in magnitude.

Blood is present in which part of a normally functioning kidney. 39 I Action potentials move faster in larger diameter axons. B the axon conductance is slowed.

Action potentials travel in both directions along an axon of a nerve cell. All action potentials for a given neuron are identical in durationc. Which of the following statements regarding action potentials is correct.

A states that all of the action potentials in a given cell are dependent upon the frequency of the stimulus. B states that if the stimulus is weak depolarization of the membrane will be weak and subsequently the action potential will be weak. The rising phase of the action potential in cardiac autorhythmic cells is due to a rapid Ca2 influx b.

C the rate of opening of ligand gated Na channels is decreased. The rising phase of action potential in cardiac autorhythmic cells is due to a rising in Ca bthe rising phase of action potential in cardiac autorhythmic in cardiac contractile cells is due to a rapid Na influx c. These two events are marked by polarization during the resting potential and brief depolarization during the action potential.

The rising phase of the action potentil in cardiac contractile cells is due to a rapid Na influx c. Movement of ions during the action potential occurs mostly through the sodium pumpe. Action potentials are propagated down the length of the axond.

Correct Action potentials travel in only one direction down an axon because sodium channels in the neuron are refractory. The frequency of action potentials not their size is the meaningful signal. Permeability or leakiness of the membrane to each ion.

Neurotransmitter binds to ligand-gated channels on the presynaptic terminal membrane which causes the membrane to become permeable to either Na or K ions. The plateau phase of the action potential in cardiac contractile cells. A the action potential amplitude is decreased.

The correct answer is B Myelin sheaths allow for action potentials to be transmitted faster within the dendrites of neurons. The plateau phase of the action. D the Na channel density is decreased along the fiber.

They occur after the threshold potential is reached. Which of the following statements regarding action potentials is. Calcium ions enter the pre-synaptic terminal when an action potential depolarizes the terminal.

Membrane 3 and the _____________. Action potentials vary in magnitude according to the strength of a sensory stimulus. Action potential results when membrane potential exceeds threshold.

In this disease voluntary movement of the limbs is slowed because. A nerve impulse is conducted following the excitation of a neuron that initiates the impulse. Action potentials can undergo summation.

Which of the following statements concerning action potentials in the heart is correct a. II Action potentials move faster in axons lacking potassium ion channels. All of the above are correct.

III Action potentials move faster in myelinated axons.

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