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Anatomy & Physiology

Study Pack

Set 6 Neuronal Signaling And The Structure Of The Nervous System

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Question 1

(Multiple Choice)

Free
According to the equation expressed as Ohm's law,which of these would cause the greatest increase in current?

A)Doubling both voltage and resistance
B)Reducing both voltage and resistance by half
C)Doubling voltage and reducing resistance by half
D)Reducing voltage by half and doubling resistance
E)Quadrupling both voltage and resistance

Answer

Question 2

(Multiple Choice)

Free
The membrane potential of most neurons at rest is

A)equal to the equilibrium potential for potassium.
B)equal to the equilibrium potential for sodium.
C)slightly more negative than the equilibrium potential of potassium ion.
D)more positive than the equilibrium potential for potassium.
E)more positive than the equilibrium potential for sodium.

Answer

Question 3

(Multiple Choice)

Free
Which of these would occur if the concentration of ATP were depleted in a typical nerve cell?

A)Resting membrane potential would become more negative.
B)Resting membrane potential would become less negative.
C)The concentration gradient for Na⁺ would remain the same.
D)The resting membrane potential would eventually become positive inside with respect to outside.
E)There would be no change in the resting membrane potential.

Answer