Question 1

In our hearts, the left and right atria contract at the same time.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is not a complication of cardiovascular disease?

Accepted Answer

A)  The interior of the person's capillaries increases in diameter. 
B)  The person's heart must work harder to force blood through the narrowed arteries. 
C)  The reduction of oxygen and nutrients to heart muscle can cause a heart attack. 
D)  The heart's ability to pump blood may be reduced. 
A)  The interior of the person's capillaries increases in diameter. 
B)  The person's heart must work harder to force blood through the narrowed arteries. 
C)  The reduction of oxygen and nutrients to heart muscle can cause a heart attack. 
D)  The heart's ability to pump blood may be reduced.

Question 3

Why are arteries surrounded by thick walls of muscle?

Accepted Answer

The walls of arterie

Question 4

The pressure in the arteries is highest while the heart is contracting.

Accepted Answer

A) True 
 B)False

Question 5

Arteries and veins, which transport materials over large distances within humans, are relatively large in diameter so that

Accepted Answer

A)  their surface area-to-volume ratio is large. 
B)  their walls are less muscular. 
C)  the friction drag of the blood is reduced. 
D)  they are well suited to gas exchange. 
A)  their surface area-to-volume ratio is large. 
B)  their walls are less muscular. 
C)  the friction drag of the blood is reduced. 
D)  they are well suited to gas exchange.

Question 6

Which of the following statements about human blood pressure is true?

Accepted Answer

A)  Blood pressure is higher in the arteries from the right ventricle than in those from the left ventricle. 
B)  As blood enters the capillaries, blood pressure is higher than the pressure in the arteries leaving the left ventricle. 
C)  As blood enters the capillaries, blood pressure is higher than the pressure of blood leaving the capillaries. 
D)  Blood pressure in the arteries is lower than the pressure of blood leaving the capillaries. 
A)  Blood pressure is higher in the arteries from the right ventricle than in those from the left ventricle. 
B)  As blood enters the capillaries, blood pressure is higher than the pressure in the arteries leaving the left ventricle. 
C)  As blood enters the capillaries, blood pressure is higher than the pressure of blood leaving the capillaries. 
D)  Blood pressure in the arteries is lower than the pressure of blood leaving the capillaries.

Question 7

Animals with open circulatory systems

Accepted Answer

A)  have only a pulmonary circuit. 
B)  have only a systemic circuit. 
C)  have circulation but no complete blood circuits. 
D)  have arterioles but not venules. 
A)  have only a pulmonary circuit. 
B)  have only a systemic circuit. 
C)  have circulation but no complete blood circuits. 
D)  have arterioles but not venules.

Question 8

The slow flow of blood through capillaries

Accepted Answer

A)  allows time for the exchange of gases and other materials. 
B)  prevents the loss of red blood cells to the interstitial fluid. 
C)  allows arterioles and venules to retain sufficient oxygen. 
D)  prevents surrounding cells from becoming detached from one another. 
A)  allows time for the exchange of gases and other materials. 
B)  prevents the loss of red blood cells to the interstitial fluid. 
C)  allows arterioles and venules to retain sufficient oxygen. 
D)  prevents surrounding cells from becoming detached from one another.

Question 9

All animals with closed circulatory systems have a heart with at least

Accepted Answer

A)  two ventricles. 
B)  two atria and one ventricle. 
C)  one atrium and one ventricle. 
D)  two atria and two ventricles. 
A)  two ventricles. 
B)  two atria and one ventricle. 
C)  one atrium and one ventricle. 
D)  two atria and two ventricles.

Question 10

A friend complains to you about the painful varicose veins in her legs. After recommending that she see her doctor, what could you suggest to relieve her discomfort?

Accepted Answer

A)  She should stand up but not move around much so that the muscles in the walls of her veins can focus on pumping her blood upward. 
B)  She should stop drinking fluids so that her body has time to absorb the excess fluids that have built up in her legs. 
C)  She should walk around so that the muscle in her legs can push against the walls of her veins and push her blood upward. 
D)  Should remove any item of clothing that creates pressure against her legs (socks or stockings) so that the blood is free to move. 
A)  She should stand up but not move around much so that the muscles in the walls of her veins can focus on pumping her blood upward. 
B)  She should stop drinking fluids so that her body has time to absorb the excess fluids that have built up in her legs. 
C)  She should walk around so that the muscle in her legs can push against the walls of her veins and push her blood upward. 
D)  Should remove any item of clothing that creates pressure against her legs (socks or stockings) so that the blood is free to move.

Question 11

In mammalian hearts, atria are separated from ventricles by

Accepted Answer

A)  one-way valves. 
B)  two-way valves. 
C)  porous valves. 
D)  capillary valves. 
A)  one-way valves. 
B)  two-way valves. 
C)  porous valves. 
D)  capillary valves.

Question 12

In an insect's _______ circulatory system, blood flows through the body cavity around the organs.

Accepted Answer

The answer of In an insect's _______ circulatory system, blood...

Question 13

In mammalian hearts,

Accepted Answer

A)  all four chambers contract at the same time. 
B)  the left and right ventricles contract alternately. 
C)  the left atrium and ventricle contract simultaneously. 
D)  the left and right ventricles contract at the same time. 
A)  all four chambers contract at the same time. 
B)  the left and right ventricles contract alternately. 
C)  the left atrium and ventricle contract simultaneously. 
D)  the left and right ventricles contract at the same time.

Question 14

Muscular animal hearts must generate enough force to lift blood against the pull of _______.

Accepted Answer

The answer of Muscular animal hearts must generate enough force...

Question 15

The sound of a human heartbeat as heard through a stethoscope is caused by the closing of valves within the heart.

Accepted Answer

A) True 
 B)False

Question 16

The muscle cells of the heart get their oxygen and nutrients from blood flowing through the heart's four chambers.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following statements about the internal transport of materials in large animals is true?

Accepted Answer

A)  Since diffusion works well only over short distances, nearly all animal body cells lie extremely close to a blood vessel. 
B)  Diffusion is the main mechanism large animals use to transport materials within their systems. 
C)  The exchange of materials between blood and the surrounding cells occurs in arteries. 
D)  The heart contains the surfaces over which most gas exchange occurs. 
A)  Since diffusion works well only over short distances, nearly all animal body cells lie extremely close to a blood vessel. 
B)  Diffusion is the main mechanism large animals use to transport materials within their systems. 
C)  The exchange of materials between blood and the surrounding cells occurs in arteries. 
D)  The heart contains the surfaces over which most gas exchange occurs.

Question 18

A mechanical pacemaker is implanted into a patient with irregular heart beats. If the pacemaker has just one electrode that can stimulate just one spot on the heart, where should that electrode be placed?

Accepted Answer

A)  in the wall between the left ventricle and the right ventricle 
B)  in the wall between the left atrium and the right atrium 
C)  on the sinoatrial node 
D)  on the atrioventricular node 
A)  in the wall between the left ventricle and the right ventricle 
B)  in the wall between the left atrium and the right atrium 
C)  on the sinoatrial node 
D)  on the atrioventricular node

Question 19

The open circulatory systems of insects

Accepted Answer

A)  lack one-way valves. 
B)  carry oxygen more efficiently than closed circulatory systems. 
C)  use a blood-like liquid to distribute nutrients. 
D)  play a role in gas exchange. 
A)  lack one-way valves. 
B)  carry oxygen more efficiently than closed circulatory systems. 
C)  use a blood-like liquid to distribute nutrients. 
D)  play a role in gas exchange.

Question 20

The process of _______ is too slow to transport essential materials from one part of a multicellular organism to another.

Accepted Answer

The answer of The process of _______ is too slow...

Exam 23: The Circulatory System

In our hearts, the left and right atria contract at the same time.

Which of the following is not a complication of cardiovascular disease?

Why are arteries surrounded by thick walls of muscle?

The pressure in the arteries is highest while the heart is contracting.

Arteries and veins, which transport materials over large distances within humans, are relatively large in diameter so that

Which of the following statements about human blood pressure is true?

Animals with open circulatory systems

The slow flow of blood through capillaries

All animals with closed circulatory systems have a heart with at least

A friend complains to you about the painful varicose veins in her legs. After recommending that she see her doctor, what could you suggest to relieve her discomfort?

In mammalian hearts, atria are separated from ventricles by

In an insect's _______ circulatory system, blood flows through the body cavity around the organs.

In mammalian hearts,

Muscular animal hearts must generate enough force to lift blood against the pull of _______.

The sound of a human heartbeat as heard through a stethoscope is caused by the closing of valves within the heart.

The muscle cells of the heart get their oxygen and nutrients from blood flowing through the heart's four chambers.

Which of the following statements about the internal transport of materials in large animals is true?

A mechanical pacemaker is implanted into a patient with irregular heart beats. If the pacemaker has just one electrode that can stimulate just one spot on the heart, where should that electrode be placed?

The open circulatory systems of insects

The process of _______ is too slow to transport essential materials from one part of a multicellular organism to another.

The Nature of Science and the Characteristics of Life

Organizing the Diversity of Life

Major Groups of Living Organisms

Chemical Building Blocks

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy and Enzymes

Photosynthesis and Cellular Respiration

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

Animal Hormones

The Nervous System

Sensing the Environment

Skeletons, Muscles, and Movement

Defenses against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

The Biosphere

Growth of Populations

Interactions among Organisms

Communities of Organisms

Ecosystems

Global Change

Biodiversity and People

Cancer: Cell Division Out of Control

Harnessing the Human Genome

Humans and Evolution

Smoking--Beyond Lung Cancer

Feeding a Hungry Planet

Building a Sustainable Society

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