Question 1

Where are neuronal pools located?

Accepted Answer

A)  within nerves 
B)  within the CNS 
C)  within the PNS 
D)  within ganglia 
A)  within nerves 
B)  within the CNS 
C)  within the PNS 
D)  within ganglia

Question 2

Bipolar neurons have one axon and one dendrite.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following are organs of the central nervous system?

Accepted Answer

A)  brain and cranial nerves 
B)  brain and spinal cord 
C)  spinal cord and spinal nerves 
D)  brain, cranial nerves, spinal cord, and spinal nerves 
A)  brain and cranial nerves 
B)  brain and spinal cord 
C)  spinal cord and spinal nerves 
D)  brain, cranial nerves, spinal cord, and spinal nerves

Question 4

Why is a neuron unable to produce an additional action potential during the absolute refractory period?

Accepted Answer

During the absolute refractory period, s

Question 5

Using the information provided in this graph, which statement best summarizes the activity in this neuron?

Accepted Answer

A)  The cell gains chloride ions, making the cell hyperpolarize. 
B)  Positive charges are lost from the cell, making the inside more negative. 
C)  The cells gains negative charges, making the inside more negative. 
D)  The cell gains positive charges, making the inside less negative. 
A)  The cell gains chloride ions, making the cell hyperpolarize. 
B)  Positive charges are lost from the cell, making the inside more negative. 
C)  The cells gains negative charges, making the inside more negative. 
D)  The cell gains positive charges, making the inside less negative.

Question 6

Which of the following is NOT a function of neurons?

Accepted Answer

A)  integration 
B)  forming the myelin sheath 
C)  transmitting motor information 
D)  carrying sensory information 
A)  integration 
B)  forming the myelin sheath 
C)  transmitting motor information 
D)  carrying sensory information

Question 7

The most common type of neuron in the human body is:

Accepted Answer

A)  unipolar. 
B)  pseudounipolar. 
C)  bipolar. 
D)  multipolar. 
A)  unipolar. 
B)  pseudounipolar. 
C)  bipolar. 
D)  multipolar.

Question 8

After acetylcholinesterase (AChE) acts, the presynaptic neuron:

Accepted Answer

A)  reabsorbs the acetate. 
B)  reabsorbs the choline. 
C)  reabsorbs synaptic vesicles. 
D)  reabsorbs acetylcholine. 
A)  reabsorbs the acetate. 
B)  reabsorbs the choline. 
C)  reabsorbs synaptic vesicles. 
D)  reabsorbs acetylcholine.

Question 9

Ependymal cells:

Accepted Answer

A)  serve as wandering phagocytes during brain injury. 
B)  circulate cerebrospinal fluid. 
C)  help form the blood -brain barrier. 
D)  form myelin in the brain and spinal cord. 
A)  serve as wandering phagocytes during brain injury. 
B)  circulate cerebrospinal fluid. 
C)  help form the blood -brain barrier. 
D)  form myelin in the brain and spinal cord.

Question 10

Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated:

Accepted Answer

A)  hyperpolarization. 
B)  spatial summation. 
C)  temporal summation. 
D)  impulse transmission. 
A)  hyperpolarization. 
B)  spatial summation. 
C)  temporal summation. 
D)  impulse transmission.

Question 11

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

Accepted Answer

A)  hyperpolarization 
B)  spatial summation 
C)  inhibition of the impulse 
D)  temporal summation 
A)  hyperpolarization 
B)  spatial summation 
C)  inhibition of the impulse 
D)  temporal summation

Question 12

Which of the following must happen first in the order events at a chemical synapse?

Accepted Answer

A)  Neurotransmitter binds to receptors on the postsynaptic neuron. 
B)  Ion channels respond to the neurotransmitter and lead to a local potential, or possibly an action potential. 
C)  Calcium ion channels in the axon terminal open. 
D)  Calcium ions cause synaptic vesicles to release neurotransmitters into the synaptic cleft. 
A)  Neurotransmitter binds to receptors on the postsynaptic neuron. 
B)  Ion channels respond to the neurotransmitter and lead to a local potential, or possibly an action potential. 
C)  Calcium ion channels in the axon terminal open. 
D)  Calcium ions cause synaptic vesicles to release neurotransmitters into the synaptic cleft.

Question 13

What specific part of the neuron communicates with a target cell and serves as the secretory region of the cell?

Accepted Answer

A)  axon terminals (synaptic knobs) 
B)  myelin sheath 
C)  cell body 
D)  dendrites 
A)  axon terminals (synaptic knobs) 
B)  myelin sheath 
C)  cell body 
D)  dendrites

Question 14

During the absolute refractory period, production of an action potential is not possible.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following would NOT terminate the effects of the neurotransmitter?

Accepted Answer

A)  degradation of the neurotransmitter by enzymes 
B)  presence of calcium ions in the presynaptic neuron 
C)  reuptake of neurotransmitter into the presynaptic neuron 
D)  diffusion of the neurotransmitter into the extracellular fluid 
A)  degradation of the neurotransmitter by enzymes 
B)  presence of calcium ions in the presynaptic neuron 
C)  reuptake of neurotransmitter into the presynaptic neuron 
D)  diffusion of the neurotransmitter into the extracellular fluid

Question 16

What is the most metabolically active part of a neuron?

Accepted Answer

A)  axon hillock 
B)  axon 
C)  dendrites 
D)  cell body 
A)  axon hillock 
B)  axon 
C)  dendrites 
D)  cell body

Question 17

What channels open or close in response to physical distortion of the membrane surface, such as vibrations or pressure?

Accepted Answer

A)  mechanically -gated 
B)  chemically -gated 
C)  ligand -gated 
D)  voltage -gated 
A)  mechanically -gated 
B)  chemically -gated 
C)  ligand -gated 
D)  voltage -gated

Question 18

Which of the following is controlled by the somatic motor division?

Accepted Answer

A)  smooth muscle 
B)  cardiac muscle 
C)  skeletal muscle 
D)  glands 
A)  smooth muscle 
B)  cardiac muscle 
C)  skeletal muscle 
D)  glands

Question 19

What is NOT associated with a chemical synapse?

Accepted Answer

A)  presynaptic neuron 
B)  gap junction 
C)  synaptic cleft 
D)  neurotransmitter 
A)  presynaptic neuron 
B)  gap junction 
C)  synaptic cleft 
D)  neurotransmitter

Question 20

The porcupinefish produces a toxin that binds voltage -gated sodium channels. Determine the effect of the toxin on nerve function.

Accepted Answer

The axon of the neuron would be unable t

Exam 11: Introduction to the Nervous System Nervous Tissue

Where are neuronal pools located?

Bipolar neurons have one axon and one dendrite.

Which of the following are organs of the central nervous system?

Why is a neuron unable to produce an additional action potential during the absolute refractory period?

Using the information provided in this graph, which statement best summarizes the activity in this neuron?

Which of the following is NOT a function of neurons?

The most common type of neuron in the human body is:

After acetylcholinesterase (AChE) acts, the presynaptic neuron:

Ependymal cells:

Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated:

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

Which of the following must happen first in the order events at a chemical synapse?

What specific part of the neuron communicates with a target cell and serves as the secretory region of the cell?

During the absolute refractory period, production of an action potential is not possible.

Which of the following would NOT terminate the effects of the neurotransmitter?

What is the most metabolically active part of a neuron?

What channels open or close in response to physical distortion of the membrane surface, such as vibrations or pressure?

Which of the following is controlled by the somatic motor division?

What is NOT associated with a chemical synapse?

The porcupinefish produces a toxin that binds voltage -gated sodium channels. Determine the effect of the toxin on nerve function.

Introduction to Anatomy Physiology

The Chemistry of Life

The Cell

Histology

The Integumentary System

Bones and Bone Tissue

The Skeletal System

Articulations

The Muscular System

Muscle Tissue Physiology

The Central Nervous System

The Peripheral Nervous System

The Autonomic Nervous System Homeostasis

The Special Senses

The Endocrine System

The Cardiovascular System I: the Heart

The Cardiovascular System Ii: Blood Vessels

Blood

The Lymphatic System Immunity

The Respiratory System

The Digestive System

Metabolism Nutrition

The Urinary System

Fluid, Electrolyte Acid-Base Homeostasis

The Reproductive System

Development Heredity

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The porcupinefish produces a toxin that binds voltage ^-gated sodium channels. Determine the effect of the toxin on nerve function.