Question 1

Which of the following is not involved in creating the resting potential of a neuron?

Accepted Answer

A)  diffusion of potassium ions out of the cell 
B)  diffusion of sodium ions into the cell 
C)  Membrane permeability for sodium ions is greater than for potassium ions. 
D)  Membrane permeability for potassium ions is greater than for sodium ions. 
E)  The interior of the plasma membrane has an excess of negative charges. 
A)  diffusion of potassium ions out of the cell 
B)  diffusion of sodium ions into the cell 
C)  Membrane permeability for sodium ions is greater than for potassium ions. 
D)  Membrane permeability for potassium ions is greater than for sodium ions. 
E)  The interior of the plasma membrane has an excess of negative charges. C

Question 2

When a second EPSP arrives at a single synapse before the effects of the first have disappeared, what occurs?

Accepted Answer

A)  spatial summation 
B)  temporal summation 
C)  inhibition of the impulse 
D)  hyperpolarization 
E)  decrease in speed of impulse transmission 
A)  spatial summation 
B)  temporal summation 
C)  inhibition of the impulse 
D)  hyperpolarization 
E)  decrease in speed of impulse transmission B

Question 3

The cytoplasm that surrounds the nucleus of a neuron is called the

Accepted Answer

A)  protoplasm. 
B)  nucleoplasm. 
C)  sarcoplasm. 
D)  neuroplasm. 
E)  perikaryon. 
A)  protoplasm. 
B)  nucleoplasm. 
C)  sarcoplasm. 
D)  neuroplasm. 
E)  perikaryon. E

Question 4

The effect that a neurotransmitter has on the postsynaptic membrane depends on

Accepted Answer

A)  the frequency of neurotransmitter release. 
B)  the nature of the neurotransmitter. 
C)  the characteristics of the receptors. 
D)  the quantity of neurotransmitters released. 
E)  all of the above 
A)  the frequency of neurotransmitter release. 
B)  the nature of the neurotransmitter. 
C)  the characteristics of the receptors. 
D)  the quantity of neurotransmitters released. 
E)  all of the above

Question 5

Figure 11-2 The Nerve Action Potential
Use Figure 11-2 to answer the following questions:
-When is the neuron in the refractory period?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 6

The minimum stimulus required to trigger an action potential is known as the ________.

Accepted Answer

The answer of The minimum stimulus required to trigger an...

Question 7

The ________ nervous system controls the skeletal muscles.

Accepted Answer

A)  sympathetic 
B)  parasympathetic 
C)  afferent 
D)  somatic 
E)  autonomic 
A)  sympathetic 
B)  parasympathetic 
C)  afferent 
D)  somatic 
E)  autonomic

Question 8

Active neurons need ATP to support which of the following?

Accepted Answer

A)  the movement of materials to the soma by axoplasmic transport 
B)  the synthesis of neurotransmitter molecules 
C)  the movement of materials from the soma by axoplasmic transport 
D)  the recovery from action potentials 
E)  all of the above 
A)  the movement of materials to the soma by axoplasmic transport 
B)  the synthesis of neurotransmitter molecules 
C)  the movement of materials from the soma by axoplasmic transport 
D)  the recovery from action potentials 
E)  all of the above

Question 9

Sensory neurons of the PNS are

Accepted Answer

A)  unipolar. 
B)  bipolar. 
C)  anaxonic. 
D)  multipolar. 
E)  tripolar. 
A)  unipolar. 
B)  bipolar. 
C)  anaxonic. 
D)  multipolar. 
E)  tripolar.

Question 10

Figure 11-2 The Nerve Action Potential
Use Figure 11-2 to answer the following questions:
-Which area of the graph shows when passive depolarization is occurring?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 11

Which of the following statements about the action potential is False ?

Accepted Answer

A)  The rapid depolarization phase is caused by the entry of potassium ions. 
B)  During the repolarization phase, sodium channels close and potassium channels open. 
C)  During the depolarization phase, membrane potential becomes positive. 
D)  In the hyperpolarization phase, membrane potential approaches the potassium equilibrium potential. 
E)  None of these statements is False , all are True
) 
A)  The rapid depolarization phase is caused by the entry of potassium ions. 
B)  During the repolarization phase, sodium channels close and potassium channels open. 
C)  During the depolarization phase, membrane potential becomes positive. 
D)  In the hyperpolarization phase, membrane potential approaches the potassium equilibrium potential. 
E)  None of these statements is False , all are True
)

Question 12

Neuron cell bodies in the PNS are clustered together in masses called ________.

Accepted Answer

The answer of Neuron cell bodies in the PNS are...

Question 13

Figure 11-1 The Neuron
Use Figure 11-1 to answer the following questions:
-Identify the structure labeled "5."

Accepted Answer

A)  axons 
B)  telodendria 
C)  dendritic spines 
D)  synaptic terminals 
E)  axosomata 
A)  axons 
B)  telodendria 
C)  dendritic spines 
D)  synaptic terminals 
E)  axosomata

Question 14

Which of the following is not a recognized structural classification for neurons?

Accepted Answer

A)  anaxonic 
B)  bipolar 
C)  multipolar 
D)  pseudopolar 
E)  unipolar 
A)  anaxonic 
B)  bipolar 
C)  multipolar 
D)  pseudopolar 
E)  unipolar

Question 15

Puffer fish poison blocks voltage-gated sodium channels like a cork. What effect would this neurotoxin have on the function of neurons?

Accepted Answer

A)  Neurons would depolarize more rapidly. 
B)  Action potentials would lack a repolarization phase. 
C)  The absolute refractory period would be shorter than normal. 
D)  The axon would be unable to generate action potentials. 
E)  None, because the chemically gated sodium channels would still function. 
A)  Neurons would depolarize more rapidly. 
B)  Action potentials would lack a repolarization phase. 
C)  The absolute refractory period would be shorter than normal. 
D)  The axon would be unable to generate action potentials. 
E)  None, because the chemically gated sodium channels would still function.

Question 16

Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called

Accepted Answer

A)  anaxonic. 
B)  unipolar. 
C)  bipolar. 
D)  tripolar. 
E)  multipolar. 
A)  anaxonic. 
B)  unipolar. 
C)  bipolar. 
D)  tripolar. 
E)  multipolar.

Question 17

Which type of synapse is most common in the nervous system?

Accepted Answer

A)  chemical 
B)  electrical 
C)  mechanical 
D)  processing 
E)  radiative 
A)  chemical 
B)  electrical 
C)  mechanical 
D)  processing 
E)  radiative

Question 18

EPSPs (excitatory postsynaptic potentials) occur when

Accepted Answer

A)  more potassium ions than usual leak out of a cell. 
B)  more calcium ions than usual leak out of a cell. 
C)  chloride ions enter a cell. 
D)  extra sodium ions enter a cell. 
E)  hyperpolarizations occur. 
A)  more potassium ions than usual leak out of a cell. 
B)  more calcium ions than usual leak out of a cell. 
C)  chloride ions enter a cell. 
D)  extra sodium ions enter a cell. 
E)  hyperpolarizations occur.

Question 19

The neurilemma of axons in the peripheral nervous system is formed by

Accepted Answer

A)  astrocytes. 
B)  satellite cells. 
C)  oligodendrocytes. 
D)  microglia. 
E)  Schwann cells. 
A)  astrocytes. 
B)  satellite cells. 
C)  oligodendrocytes. 
D)  microglia. 
E)  Schwann cells.

Question 20

Figure 11-2 The Nerve Action Potential
Use Figure 11-2 to answer the following questions:
-Which point of the graph shows when potassium ion outflow exceeds sodium ion inflow?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Exam 11: Neural Tissue

Which of the following is not involved in creating the resting potential of a neuron?

When a second EPSP arrives at a single synapse before the effects of the first have disappeared, what occurs?

The cytoplasm that surrounds the nucleus of a neuron is called the

The effect that a neurotransmitter has on the postsynaptic membrane depends on

Figure 11-2 The Nerve Action Potential Use Figure 11-2 to answer the following questions: -When is the neuron in the refractory period?

The minimum stimulus required to trigger an action potential is known as the ________.

The ________ nervous system controls the skeletal muscles.

Active neurons need ATP to support which of the following?

Sensory neurons of the PNS are

Figure 11-2 The Nerve Action Potential Use Figure 11-2 to answer the following questions: -Which area of the graph shows when passive depolarization is occurring?

Which of the following statements about the action potential is False ?

Neuron cell bodies in the PNS are clustered together in masses called ________.

Figure 11-1 The Neuron Use Figure 11-1 to answer the following questions: -Identify the structure labeled "5."

Which of the following is not a recognized structural classification for neurons?

Puffer fish poison blocks voltage-gated sodium channels like a cork. What effect would this neurotoxin have on the function of neurons?

Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called

Which type of synapse is most common in the nervous system?

EPSPs (excitatory postsynaptic potentials) occur when

The neurilemma of axons in the peripheral nervous system is formed by

Figure 11-2 The Nerve Action Potential Use Figure 11-2 to answer the following questions: -Which point of the graph shows when potassium ion outflow exceeds sodium ion inflow?

An Introduction to Anatomy and Physiology

Chemical Level of Organization

Cellular Level of Organization

Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Skeleton

Articulations

Skeletal Muscle Tissue

The Muscular System

The Spinal Cord, Spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood and Blood Vessels

The Heart and Cardiovascular Function

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters

$Figure 11-2 The Nerve Action Potential Use Figure 11-2 to answer the following questions: -When is the neuron in the refractory period?$ Figure 11-2 The Nerve Action Potential Use Figure 11-2 to answer the following questions: -When is the neuron in the refractory period?