Question 1

Clusters of gray matter deep within the brain are called

Accepted Answer

A)  cortices. 
B)  nerves. 
C)  ganglia. 
D)  nuclei. 
A)  cortices. 
B)  nerves. 
C)  ganglia. 
D)  nuclei.

Question 2

A neuron that conducts pain sensations to the central nervous system would be classified as a(n)

Accepted Answer

A)  motor neuron. 
B)  sensory or afferent neuron. 
C)  efferent neuron. 
D)  association neuron. 
E)  interneuron. 
A)  motor neuron. 
B)  sensory or afferent neuron. 
C)  efferent neuron. 
D)  association neuron. 
E)  interneuron.

Question 3

During the absolute refractory period, the cell

Accepted Answer

A)  generates many local potentials. 
B)  is insensitive to further stimulation. 
C)  responds to even weak stimuli. 
D)  reverses the direction of the action potential. 
E)  is very sensitive. 
A)  generates many local potentials. 
B)  is insensitive to further stimulation. 
C)  responds to even weak stimuli. 
D)  reverses the direction of the action potential. 
E)  is very sensitive.

Question 4

An action potential

Accepted Answer

A)  occurs when the local potential reaches threshold level. 
B)  propagates across the plasma membrane in a decremental fashion. 
C)  has no repolarization phase. 
D)  is an example of negative feedback. 
E)  cannot transmit information. 
A)  occurs when the local potential reaches threshold level. 
B)  propagates across the plasma membrane in a decremental fashion. 
C)  has no repolarization phase. 
D)  is an example of negative feedback. 
E)  cannot transmit information.

Question 5

Axons contain

Accepted Answer

A)  the trigger zone. 
B)  foot processes. 
C)  Nissl bodies. 
D)  the soma. 
E)  the rough endoplasmic reticulum. 
A)  the trigger zone. 
B)  foot processes. 
C)  Nissl bodies. 
D)  the soma. 
E)  the rough endoplasmic reticulum.

Question 6

Mr. Miller has been hospitalized for the flu. The flu virus increases membrane permeability to potassium. You would expect his cells to

Accepted Answer

A)  depolarize. 
B)  repolarize. 
C)  isopolarize. 
D)  hyperpolarize. 
E)  hypopolarize. 
A)  depolarize. 
B)  repolarize. 
C)  isopolarize. 
D)  hyperpolarize. 
E)  hypopolarize.

Question 7

Neurons that have a single axon and a single dendrite are

Accepted Answer

A)  tripolar. 
B)  bipolar. 
C)  multipolar. 
D)  pseudo-unipolar. 
A)  tripolar. 
B)  bipolar. 
C)  multipolar. 
D)  pseudo-unipolar.

Question 8

If you cut bundles of axons and their myelin sheaths in the PNS, you cut

Accepted Answer

A)  ganglia. 
B)  nuclei. 
C)  nerves. 
D)  gray matter. 
E)  nerve tracts. 
A)  ganglia. 
B)  nuclei. 
C)  nerves. 
D)  gray matter. 
E)  nerve tracts.

Question 9

The central nervous system includes the

Accepted Answer

A)  ganglia. 
B)  spinal cord. 
C)  spinal nerves. 
D)  cranial nerves. 
E)  sensory receptors. 
A)  ganglia. 
B)  spinal cord. 
C)  spinal nerves. 
D)  cranial nerves. 
E)  sensory receptors.

Question 10

The same neurotransmitter may produce different effects on neurons because of differences in the

Accepted Answer

A)  type of receptors on the postsynaptic membranes of neurons. 
B)  strength of the action potential. 
C)  amount of neurotransmitter. 
D)  size of the neurons. 
E)  potassium channels. 
A)  type of receptors on the postsynaptic membranes of neurons. 
B)  strength of the action potential. 
C)  amount of neurotransmitter. 
D)  size of the neurons. 
E)  potassium channels.

Question 11

Axons

Accepted Answer

A)  contain the nucleus. 
B)  are numerous extensions from each neuron. 
C)  do not have a trigger zone. 
D)  have a distal portion that branches to form the presynaptic terminals. 
E)  do not have a resting membrane potential. 
A)  contain the nucleus. 
B)  are numerous extensions from each neuron. 
C)  do not have a trigger zone. 
D)  have a distal portion that branches to form the presynaptic terminals. 
E)  do not have a resting membrane potential.

Question 12

Viagra is used to treat erectile dysfunction by prolonging the effects of _____ on blood vessels.

Accepted Answer

A)  substance P 
B)  dopamine 
C)  GABA 
D)  nitric oxide (NO) 
A)  substance P 
B)  dopamine 
C)  GABA 
D)  nitric oxide (NO)

Question 13

Multiple sclerosis is a neurological disorder in which myelin sheaths in the CNS are destroyed. Which of the following neuroglial cells is being damaged in multiple sclerosis?

Accepted Answer

A)  astrocyte 
B)  microglial cell 
C)  oligodendrocyte 
D)  ependymal cell 
E)  Schwann cells 
A)  astrocyte 
B)  microglial cell 
C)  oligodendrocyte 
D)  ependymal cell 
E)  Schwann cells

Question 14

Which of the following statements regarding neuroglia is false?

Accepted Answer

A)  Neuroglia serve as the major supporting tissue in the CNS. 
B)  Neuroglia form part of the blood-brain barrier. 
C)  Neuroglia produce action potentials for skeletal muscles. 
D)  Neuroglia form myelin sheaths around some axons. 
E)  Neuroglia produce cerebrospinal fluid. 
A)  Neuroglia serve as the major supporting tissue in the CNS. 
B)  Neuroglia form part of the blood-brain barrier. 
C)  Neuroglia produce action potentials for skeletal muscles. 
D)  Neuroglia form myelin sheaths around some axons. 
E)  Neuroglia produce cerebrospinal fluid.

Question 15

Each voltage-gated Na+ ion channel has two voltage sensitive gates: an activation gate and an inactivation gate. Which of the following would occur during depolarization?

Accepted Answer

A)  Activation gates are open; inactivation gates are closed. 
B)  Activation gates are closed; inactivation gates are open. 
C)  Both activation and inactivation gates are open. 
D)  Both activation and inactivation gates are closed. 
E)  None of these events occurs during depolarization. 
A)  Activation gates are open; inactivation gates are closed. 
B)  Activation gates are closed; inactivation gates are open. 
C)  Both activation and inactivation gates are open. 
D)  Both activation and inactivation gates are closed. 
E)  None of these events occurs during depolarization.

Exam 11: Functional Organization of Nervous Tissue

Clusters of gray matter deep within the brain are called

A neuron that conducts pain sensations to the central nervous system would be classified as a(n)

During the absolute refractory period, the cell

An action potential

Axons contain

Mr. Miller has been hospitalized for the flu. The flu virus increases membrane permeability to potassium. You would expect his cells to

Neurons that have a single axon and a single dendrite are

If you cut bundles of axons and their myelin sheaths in the PNS, you cut

The central nervous system includes the

The same neurotransmitter may produce different effects on neurons because of differences in the

Axons

Viagra is used to treat erectile dysfunction by prolonging the effects of _____ on blood vessels.

Multiple sclerosis is a neurological disorder in which myelin sheaths in the CNS are destroyed. Which of the following neuroglial cells is being damaged in multiple sclerosis?

Which of the following statements regarding neuroglia is false?

Each voltage-gated Na+ ion channel has two voltage sensitive gates: an activation gate and an inactivation gate. Which of the following would occur during depolarization?

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

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