Question 1

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 directions 
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 directions

Question 2

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 3

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 4

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

Accepted Answer

A) True 
 B)False

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. 
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.

Question 6

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 7

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 summation 
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 summation

Question 8

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 9

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 state 
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 state

Question 10

____________________ are released into the blood by neurosecretory neurons.

Accepted Answer

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

Question 11

Action potentials may result from hyperpolarization or depolarization.

Accepted Answer

A) True 
 B)False

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

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

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

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

Select the incorrect statement about the action potential.

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

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

____________________ are released into the blood by neurosecretory neurons.

Action potentials may result from hyperpolarization or depolarization.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

The Central Nervous System

The Peripheral Nervous System: Afferent Division Special Senses

The Peripheral Nervous System: Efferent Division

Muscle Physiology

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

Principles of Endocrinology: the Central Endocrine Glands

The Peripheral Endocrine Glands

The Reproductive System

Filters

Exam 4: Principles of Neural and Hormonal Communication

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

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

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

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

Select the incorrect statement about the action potential.

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

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

____________________ are released into the blood by neurosecretory neurons.

Action potentials may result from hyperpolarization or depolarization.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

The Central Nervous System

The Peripheral Nervous System: Afferent Division Special Senses

The Peripheral Nervous System: Efferent Division

Muscle Physiology

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

Principles of Endocrinology: the Central Endocrine Glands

The Peripheral Endocrine Glands

The Reproductive System

Filters

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