Question 1

Action potentials can transmit information rapidly but weaken as they move along a neuron.

Accepted Answer

A) True 
 B)False

Question 2

At resting potential, the overall charge of the plasma membrane is

Accepted Answer

A)  positive because of the movement of myelin out of a neuron. 
B)  negative because of the sodium ions being pumped out of a neuron. 
C)  positive because sodium channels open in the axon but not in the cell body. 
D)  negative because of sodium channels close in the dendrite but not in the axon. 
A)  positive because of the movement of myelin out of a neuron. 
B)  negative because of the sodium ions being pumped out of a neuron. 
C)  positive because sodium channels open in the axon but not in the cell body. 
D)  negative because of sodium channels close in the dendrite but not in the axon.

Question 3

The cerebrum has four major lobes. Which of the following is one of these?

Accepted Answer

A)  parietal 
B)  cerebellum 
C)  thalamus 
D)  medulla oblongata 
A)  parietal 
B)  cerebellum 
C)  thalamus 
D)  medulla oblongata

Question 4

Neurotransmitters are released into a synaptic cleft by the process of __________.

Accepted Answer

The answer of Neurotransmitters are released into a synaptic cleft...

Question 5

Neurotransmitters carry a signal from a stimulated nerve cell to another nerve cell across a gap known as a

Accepted Answer

A)  synaptic cleft. 
B)  target. 
C)  receptor. 
D)  cytokinin. 
A)  synaptic cleft. 
B)  target. 
C)  receptor. 
D)  cytokinin.

Question 6

The brain and spinal cord make up the _______ nervous system.

Accepted Answer

The answer of The brain and spinal cord make up...

Question 7

Dendrites are highly branched so that they can

Accepted Answer

A)  collect sensory information from a variety of locations in the body. 
B)  transmit instructions to many different cells. 
C)  transmit information faster than myelinated neurons. 
D)  create stronger action potentials by allowing more sodium to enter the cell at one time. 
A)  collect sensory information from a variety of locations in the body. 
B)  transmit instructions to many different cells. 
C)  transmit information faster than myelinated neurons. 
D)  create stronger action potentials by allowing more sodium to enter the cell at one time.

Question 8

A person with vitamin B deficiency often exhibits a "slow" nervous system. For example, their knee-jerk reflex is much slower than normal. Which of the following might explain why this is the case?

Accepted Answer

A)  The neurons of people with vitamin B deficiency have more sodium channels in the plasma membranes of their neurons than normal. 
B)  People with a vitamin B deficiency produce less myelin than a normal person does. 
C)  Axons are slightly longer in a person with vitamin B deficiency, so the distance between transmitting and receiving cells is shorter. 
D)  People with vitamin B deficiencies produce weaker action potentials than normal people do. 
A)  The neurons of people with vitamin B deficiency have more sodium channels in the plasma membranes of their neurons than normal. 
B)  People with a vitamin B deficiency produce less myelin than a normal person does. 
C)  Axons are slightly longer in a person with vitamin B deficiency, so the distance between transmitting and receiving cells is shorter. 
D)  People with vitamin B deficiencies produce weaker action potentials than normal people do.

Question 9

Initially, when a neuron receives a stimulus,

Accepted Answer

A)  sodium diffuses out of the neuron. 
B)  neurotransmitters are released from axon terminals. 
C)  sodium channels close 
D)  sodium enters the neuron. 
A)  sodium diffuses out of the neuron. 
B)  neurotransmitters are released from axon terminals. 
C)  sodium channels close 
D)  sodium enters the neuron.

Exam 25: The Nervous System

Action potentials can transmit information rapidly but weaken as they move along a neuron.

At resting potential, the overall charge of the plasma membrane is

The cerebrum has four major lobes. Which of the following is one of these?

Neurotransmitters are released into a synaptic cleft by the process of __________.

Neurotransmitters carry a signal from a stimulated nerve cell to another nerve cell across a gap known as a

The brain and spinal cord make up the _______ nervous system.

Dendrites are highly branched so that they can

A person with vitamin B deficiency often exhibits a "slow" nervous system. For example, their knee-jerk reflex is much slower than normal. Which of the following might explain why this is the case?

Initially, when a neuron receives a stimulus,

The Nature of Science and the Characteristics of Life

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Major Groups of Living Organisms

Chemical Building Blocks

Cell Structure and Internal Compartments

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Energy and Enzymes

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Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

DNA

From Gene to Protein

Control of Gene Expression

DNA Technology

How Evolution Works

Evolution of Populations

Adaptation and Speciation

The Evolutionary History of Life

Maintaining the Internal Environment

Animal Nutrition and Digestion

Gas Exchange

The Circulatory System

Animal Hormones

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Skeletons, Muscles, and Movement

Defenses against Disease

Reproduction and Development

Animal Behavior

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The Biosphere

Growth of Populations

Interactions among Organisms

Communities of Organisms

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Cancer: Cell Division Out of Control

Harnessing the Human Genome

Humans and Evolution

Smoking--Beyond Lung Cancer

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