Question 1

The neuronal relationship where a single presynaptic cell branches to terminate on many other cells is called ____________________.

Accepted Answer

The answer of The neuronal relationship where a single presynaptic...

Question 2

If a neuron were experimentally stimulated at both ends simultaneously, then

Accepted Answer

A)  the action potentials would pass in the middle and travel to the opposite ends
B)  the action potentials would meet in the middle and then be propagated back to their starting positions
C)  the action potentials would stop as they met in the middle
D)  the strongest action potential would override the weaker action potential
E)  summation would occur when the action potentials met in the middle, resulting in a two larger action potentials traveling in opposite directionsF) C) and E)
G) B) and D)

Question 3

When the membrane potential is +15 mV, that portion of the membrane

Accepted Answer

A)  is at the normal resting potential
B)  has a positively-charged inside border
C)  is more permeable to Ca²⁺ than normal
D)  is in the after hyperpolarization phase of an action potential
E)  is in a hyperpolarized stateF) A) and B)
G) A) and C)

Question 4

Indicate the relationship between the two items listed in each situation:
a.A is greater than b.
b.B is greater than a.
c.A and B are equal.
-a.Na⁺ concentration in the neuron's cytosol immediately before an action potential
B.Na⁺ concentration in the neuron's cytosol immediately following an action potential

Accepted Answer

The answer of Indicate the relationship between the two items...

Question 5

A hypothetical postsynaptic neuron has three presynaptic inputs-X, Y, and Z.When X and Y are stimulated simultaneously, the postsynaptic neuron undergoes an action potential, yet when X and Z are stimulated simultaneously, there is no change in the postsynaptic neuron's potential.What can you logically conclude?

Accepted Answer

A)  Y and Z are both excitatory.
B)  Y and Z are both inhibitory.
C)  Y is excitatory and Z is inhibitory.
D)  Y is inhibitory and Z is excitatory.
E)  Not enough information to answer.F) B) and D)
G) B) and C)

Question 6

____________________ are released into the blood by neurosecretory neurons.

Accepted Answer

The answer of ____________________ are released into the blood by...

Question 7

For a neuron, the axon is its _______ zone and an axon terminal is its ______ zone.

Accepted Answer

The answer of For a neuron, the axon is its...

Question 8

Select the incorrect statement about the action potential.

Accepted Answer

A)  It has an all-or-none characteristic
B)  It has a refractory period
C)  It is triggered by depolarization to threshold
D)  It occurs along a plasma membrane
E)  It speeds up transmission by summationF) A) and D)
G) A) and B)

Question 9

Action potentials may result from hyperpolarization or depolarization.

Accepted Answer

A) True 
 B)False

Question 10

Indicate whether the membrane is more permeable to K⁺ or to Na⁺ or is equally permeable to these ions under the stated conditions:
a.more permeable to K+ than to Na+
b.more permeable to Na+ than to K+
c.equally permeable to Na+ and K+
-During the rising phase of an action potential

Accepted Answer

The answer of Indicate whether the membrane is more permeable...

Question 11

During the relative refractory period, a neuron can experience hyperpolarization but not depolarization.

Accepted Answer

A) True 
 B)False

Exam 4: Principles of Neural and Hormonal Communication

If a neuron were experimentally stimulated at both ends simultaneously, then

Correct Answer
verified

Indicate whether the membrane is more permeable to K⁺ or to Na⁺ or is equally permeable to these ions under the stated conditions: a.more permeable to K+ than to Na+ b.more permeable to Na+ than to K+ c.equally permeable to Na+ and K+ -During the rising phase of an action potential

Correct Answer
verified

Action potentials may result from hyperpolarization or depolarization.

Correct Answer
verified

During the relative refractory period, a neuron can experience hyperpolarization but not depolarization.

Correct Answer
verified

For a neuron, the axon is its _ zone and an axon terminal is its zone.

Correct Answer
verified

The neuronal relationship where a single presynaptic cell branches to terminate on many other cells is called ____________________.

Correct Answer
verified

Correct Answer
verified

When the membrane potential is +15 mV, that portion of the membrane

Correct Answer
verified

Correct Answer
verified

____________________ are released into the blood by neurosecretory neurons.

Correct Answer
verified

Select the incorrect statement about the action potential.

Correct Answer
verified

Exam 4: Principles of Neural and Hormonal Communication

If a neuron were experimentally stimulated at both ends simultaneously, then

Correct AnswerverifiedShow Answer

Indicate whether the membrane is more permeable to K⁺ or to Na⁺ or is equally permeable to these ions under the stated conditions: a.more permeable to K+ than to Na+ b.more permeable to Na+ than to K+ c.equally permeable to Na+ and K+ -During the rising phase of an action potential

Correct AnswerverifiedShow Answer

Action potentials may result from hyperpolarization or depolarization.

Correct AnswerverifiedShow Answer

During the relative refractory period, a neuron can experience hyperpolarization but not depolarization.

Correct AnswerverifiedShow Answer

For a neuron, the axon is its _______ zone and an axon terminal is its ______ zone.

Correct AnswerverifiedShow Answer

The neuronal relationship where a single presynaptic cell branches to terminate on many other cells is called ____________________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

When the membrane potential is +15 mV, that portion of the membrane

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

____________________ are released into the blood by neurosecretory neurons.

Correct AnswerverifiedShow Answer

Select the incorrect statement about the action potential.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For a neuron, the axon is its _ zone and an axon terminal is its zone.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified