Question 1

The human body has more sensory input to the CNS than the traditional "five senses."

Accepted Answer

A) True 
 B)False  True

Question 2

Imagine a person's spinal cord has been severed high enough that they feel nothing from their legs.Do the sensory neurons in their legs stop functioning? Explain your answer.

Accepted Answer

The sensory neurons are undamaged and continue functioning.The sensory neurons will still detect stimuli and send an impulse to neurons in the spinal cord.But the pathway running from spinal cord to brain has been cut above the level where the sensory neuron enters,so signals from these neurons won't be able to reach the brain; therefore,the brain won't sense anything.

Question 3

Any collection of nerve cell bodies in the PNS is called a:

Accepted Answer

A) ganglion. 
B) afferent nerve. 
C) efferent nerve. 
D) dendrite. 
A) ganglion. 
B) afferent nerve. 
C) efferent nerve. 
D) dendrite. A

Question 4

When a neuron is at its "resting potential," which of the following is true about the concentration of sodium ions?

Accepted Answer

A) Sodium ions have a greater concentration inside the neuron's cell membrane. 
B) Sodium ions have a greater concentration outside the neuron's cell membrane. 
C) The sodium concentration is the same outside and inside the neuron's cell membrane. 
A) Sodium ions have a greater concentration inside the neuron's cell membrane. 
B) Sodium ions have a greater concentration outside the neuron's cell membrane. 
C) The sodium concentration is the same outside and inside the neuron's cell membrane.

Question 5

The iris of the human eye is composed partly of:

Accepted Answer

A) nervous tissue. 
B) empty space. 
C) rods. 
D) connective tissue. 
E) smooth muscle. 
A) nervous tissue. 
B) empty space. 
C) rods. 
D) connective tissue. 
E) smooth muscle.

Question 6

The parasympathetic division of the autonomic nervous system would be key in preserving an individual who is escaping from a dangerous situation.

Accepted Answer

A) True 
 B)False

Question 7

A section of a neuron's membrane becomes temporarily positive on the inside when:

Accepted Answer

A) ion channels open and sodium ions rush in. 
B) ion channels open and potassium ions rush in. 
C) negatively charged proteins exit the cell. 
D) neurotransmitters enter the cell. 
A) ion channels open and sodium ions rush in. 
B) ion channels open and potassium ions rush in. 
C) negatively charged proteins exit the cell. 
D) neurotransmitters enter the cell.

Question 8

Inrushing sodium ions trigger the opening of nearby channels and movement of sodium inward at that neighboring section of the membrane.What is occurring?

Accepted Answer

A) normal resting potential 
B) an action potential 
C) neurotransmitter release 
D) protein movement 
A) normal resting potential 
B) an action potential 
C) neurotransmitter release 
D) protein movement

Question 9

Which of the following best describes the structural aspect of the cerebral cortex?

Accepted Answer

A) a thin band of gray matter making the outer layer of the cerebrum 
B) a thick band of white matter making the outer layer of the cerebrum 
C) a core of fast, myelinated axons in the interior of the brain 
D) a cap of white matter over the spinal cord, made mostly of the thalamus 
A) a thin band of gray matter making the outer layer of the cerebrum 
B) a thick band of white matter making the outer layer of the cerebrum 
C) a core of fast, myelinated axons in the interior of the brain 
D) a cap of white matter over the spinal cord, made mostly of the thalamus

Question 10

Which of the following would send a signal to the central nervous system that you had touched a hot object?

Accepted Answer

A) motor neuron 
B) sensory neuron 
C) interneuron 
D) glial cell 
A) motor neuron 
B) sensory neuron 
C) interneuron 
D) glial cell

Question 11

Neurons are not correct cells because they aren't spherical in shape.

Accepted Answer

A) True 
 B)False

Question 12

Any nerve that carries messages from the brain and spinal cord is an afferent division of the PNS.

Accepted Answer

A) True 
 B)False

Question 13

In a reflex such as the "knee jerk" or patellar reflex,the efferent signal travels through the:

Accepted Answer

A) spinal cord. 
B) motor neuron. 
C) sensory neuron. 
D) interneuron. 
A) spinal cord. 
B) motor neuron. 
C) sensory neuron. 
D) interneuron.

Question 14

The portion of the nervous system that most directly controls skeletal muscles is the:

Accepted Answer

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

Question 15

Novocain,or procaine,is a chemical that dentists use to numb your mouth before drilling.The chemical blocks the sodium gates on sensory neurons,preventing them from opening.Describe how this chemical decreases (One hopes!)the perception of pain.

Accepted Answer

Because the chemical prevents sodium gat

Question 16

A drug that causes potassium to leak out of the neuron would:

Accepted Answer

A) make it harder to trigger action potentials in the neuron. 
B) cause the inside of the neuron to become more positive. 
C) cause the outside of the neuron to become more negative. 
D) make it easier to trigger action potentials in the neuron. 
A) make it harder to trigger action potentials in the neuron. 
B) cause the inside of the neuron to become more positive. 
C) cause the outside of the neuron to become more negative. 
D) make it easier to trigger action potentials in the neuron.

Question 17

In which layer of cells in the eye is light converted into an electrical signal?

Accepted Answer

The answer of In which layer of cells in the...

Question 18

Routine activities and energy conservation are controlled by the:

Accepted Answer

A) peripheral nervous system. 
B) parasympathetic division. 
C) sympathetic division. 
D) thalamus. 
A) peripheral nervous system. 
B) parasympathetic division. 
C) sympathetic division. 
D) thalamus.

Question 19

Our visual system creates images as well as perceiving them.

Accepted Answer

A) True 
 B)False

Question 20

Which statement about the sense of smell in humans is most accurate?

Accepted Answer

A) Smell is about equally as strong as taste. 
B) One hundred different receptor varieties allow us to discern about 100 scents. 
C) Combinations of over 300 receptors allow us to discern thousands of scents. 
D) Ciliated cells rapidly move scent molecules to the brain for rapid analysis. 
A) Smell is about equally as strong as taste. 
B) One hundred different receptor varieties allow us to discern about 100 scents. 
C) Combinations of over 300 receptors allow us to discern thousands of scents. 
D) Ciliated cells rapidly move scent molecules to the brain for rapid analysis.

Exam 27: Communication and Control 1: the Nervous System

The human body has more sensory input to the CNS than the traditional "five senses."

Imagine a person's spinal cord has been severed high enough that they feel nothing from their legs.Do the sensory neurons in their legs stop functioning? Explain your answer.

Any collection of nerve cell bodies in the PNS is called a:

When a neuron is at its "resting potential," which of the following is true about the concentration of sodium ions?

The iris of the human eye is composed partly of:

The parasympathetic division of the autonomic nervous system would be key in preserving an individual who is escaping from a dangerous situation.

A section of a neuron's membrane becomes temporarily positive on the inside when:

Inrushing sodium ions trigger the opening of nearby channels and movement of sodium inward at that neighboring section of the membrane.What is occurring?

Which of the following best describes the structural aspect of the cerebral cortex?

Which of the following would send a signal to the central nervous system that you had touched a hot object?

Neurons are not correct cells because they aren't spherical in shape.

Any nerve that carries messages from the brain and spinal cord is an afferent division of the PNS.

In a reflex such as the "knee jerk" or patellar reflex,the efferent signal travels through the:

The portion of the nervous system that most directly controls skeletal muscles is the:

Novocain,or procaine,is a chemical that dentists use to numb your mouth before drilling.The chemical blocks the sodium gates on sensory neurons,preventing them from opening.Describe how this chemical decreases (One hopes!)the perception of pain.

A drug that causes potassium to leak out of the neuron would:

In which layer of cells in the eye is light converted into an electrical signal?

Routine activities and energy conservation are controlled by the:

Our visual system creates images as well as perceiving them.

Which statement about the sense of smell in humans is most accurate?

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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