Question 1

If the chemically gated sodium channels in the postsynaptic membrane were completely blocked,

Accepted Answer

A)  synaptic transmission would fail. 
B)  release of neurotransmitter would stop. 
C)  smaller action potentials would result. 
D)  all of the above 
E)  none of the above 
A)  synaptic transmission would fail. 
B)  release of neurotransmitter would stop. 
C)  smaller action potentials would result. 
D)  all of the above 
E)  none of the above

Question 2

The sodium-potassium ion exchange pump

Accepted Answer

A)  is not involved in producing the resting membrane potential. 
B)  transports sodium ions into the cell during depolarization. 
C)  transports potassium ions out of the cell during repolarization. 
D)  moves sodium and potassium opposite to the direction of their electrochemical gradients. 
E)  depends on a hydrogen gradient for energy. 
A)  is not involved in producing the resting membrane potential. 
B)  transports sodium ions into the cell during depolarization. 
C)  transports potassium ions out of the cell during repolarization. 
D)  moves sodium and potassium opposite to the direction of their electrochemical gradients. 
E)  depends on a hydrogen gradient for energy.

Question 3

Voltage-gated sodium channels have both an activation gate and a(n) ________ gate.

Accepted Answer

A)  inactivation 
B)  ion 
C)  swinging 
D)  repolarization 
E)  threshold 
A)  inactivation 
B)  ion 
C)  swinging 
D)  repolarization 
E)  threshold

Question 4

Branches that may occur along an axon are called

Accepted Answer

A)  dendrites. 
B)  synaptic knobs. 
C)  collaterals. 
D)  hillocks. 
E)  synapses. 
A)  dendrites. 
B)  synaptic knobs. 
C)  collaterals. 
D)  hillocks. 
E)  synapses.

Question 5

Extensive damage to oligodendrocytes in the CNS could result in

Accepted Answer

A)  loss of the structural framework of the brain. 
B)  a breakdown of the blood-brain barrier. 
C)  inability to produce scar tissue at the site of an injury. 
D)  decreased production of cerebrospinal fluid. 
E)  loss of sensation and motor control. 
A)  loss of the structural framework of the brain. 
B)  a breakdown of the blood-brain barrier. 
C)  inability to produce scar tissue at the site of an injury. 
D)  decreased production of cerebrospinal fluid. 
E)  loss of sensation and motor control.

Question 6

________ neurons are the most common class in the CNS.

Accepted Answer

A)  Multipolar 
B)  Anaxonic 
C)  Unipolar 
D)  Bipolar 
E)  none of the above 
A)  Multipolar 
B)  Anaxonic 
C)  Unipolar 
D)  Bipolar 
E)  none of the above

Question 7

Neurons that have one axon and one dendrite, with the soma in between, 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 8

The axoplasm of the axon contains which of the following?

Accepted Answer

A)  neurotubules 
B)  mitochondria 
C)  vesicles 
D)  neurofibrils 
E)  all of the above 
A)  neurotubules 
B)  mitochondria 
C)  vesicles 
D)  neurofibrils 
E)  all of the above

Question 9

Which of the following is a type of glial cell found in the peripheral nervous system?

Accepted Answer

A)  astrocytes 
B)  satellite cells 
C)  oligodendrocytes 
D)  microglia 
E)  ependymal cells 
A)  astrocytes 
B)  satellite cells 
C)  oligodendrocytes 
D)  microglia 
E)  ependymal cells

Question 10

Voltage-gated channels are present

Accepted Answer

A)  at the motor end plate. 
B)  on the surface of dendrites. 
C)  in the membrane that covers axons. 
D)  on the soma of neurons. 
E)  along the perikaryon of neurons. 
A)  at the motor end plate. 
B)  on the surface of dendrites. 
C)  in the membrane that covers axons. 
D)  on the soma of neurons. 
E)  along the perikaryon of neurons.

Question 11

The cytoskeleton of the perikaryon contains which of the following?

Accepted Answer

A)  neurofilaments 
B)  telodendria 
C)  neurotubules 
D)  all of the above 
E)  none of the above 
A)  neurofilaments 
B)  telodendria 
C)  neurotubules 
D)  all of the above 
E)  none of the above

Question 12

The ion that triggers the release of acetylcholine into the synaptic cleft is

Accepted Answer

A)  sodium. 
B)  potassium. 
C)  calcium. 
D)  chloride. 
E)  magnesium. 
A)  sodium. 
B)  potassium. 
C)  calcium. 
D)  chloride. 
E)  magnesium.

Question 13

________ account for roughly half of the volume of the nervous system.

Accepted Answer

A)  Axons 
B)  Dendrites 
C)  Neuroglia 
D)  Synapses 
E)  Efferent fibers 
A)  Axons 
B)  Dendrites 
C)  Neuroglia 
D)  Synapses 
E)  Efferent fibers

If the chemically gated sodium channels in the postsynaptic membrane were completely blocked,

The sodium-potassium ion exchange pump

Voltage-gated sodium channels have both an activation gate and a(n) ________ gate.

Branches that may occur along an axon are called

Extensive damage to oligodendrocytes in the CNS could result in

________ neurons are the most common class in the CNS.

Neurons that have one axon and one dendrite, with the soma in between, are called

The axoplasm of the axon contains which of the following?

Which of the following is a type of glial cell found in the peripheral nervous system?

Voltage-gated channels are present

The cytoskeleton of the perikaryon contains which of the following?

The ion that triggers the release of acetylcholine into the synaptic cleft is

________ account for roughly half of the volume of the nervous system.

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

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Exam 11: Neural Tissue

If the chemically gated sodium channels in the postsynaptic membrane were completely blocked,

The sodium-potassium ion exchange pump

Voltage-gated sodium channels have both an activation gate and a(n) ________ gate.

Branches that may occur along an axon are called

Extensive damage to oligodendrocytes in the CNS could result in

________ neurons are the most common class in the CNS.

Neurons that have one axon and one dendrite, with the soma in between, are called

The axoplasm of the axon contains which of the following?

Which of the following is a type of glial cell found in the peripheral nervous system?

Voltage-gated channels are present

The cytoskeleton of the perikaryon contains which of the following?

The ion that triggers the release of acetylcholine into the synaptic cleft is

________ account for roughly half of the volume of the nervous system.

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