Question 1

The three-chambered heart of a frog is ________ [more or less?] efficient than the four-chambered heart of a vertebrate.

Accepted Answer

The answer of The three-chambered heart of a frog is...

Question 2

The sinoatrial (SA) node is also called the pacemaker of the heart because it determines the _________ at which the heart beats.

Accepted Answer

The answer of The sinoatrial (SA) node is also called...

Question 3

The pressure needed to move blood from the body back to the heart is created by the contraction of the

Accepted Answer

A)  skeletal muscles of the body. 
B)  left ventricle of the heart. 
C)  one-way valves in the veins. 
D)  walls of the veins. 
A)  skeletal muscles of the body. 
B)  left ventricle of the heart. 
C)  one-way valves in the veins. 
D)  walls of the veins.

Question 4

Oxygen is transported to the cells of an insect through its open circulatory system.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is not one of the three kinds of human blood vessels?

Accepted Answer

A)  capillary 
B)  vein 
C)  alveolus 
D)  artery 
A)  capillary 
B)  vein 
C)  alveolus 
D)  artery

Question 6

Which of the following blood pressures would indicate a healthy heart?

Accepted Answer

A)  102/23 mm Hg 
B)  40/120 mm Hg 
C)  113/69 mm Hg 
D)  248/130 mm Hg 
A)  102/23 mm Hg 
B)  40/120 mm Hg 
C)  113/69 mm Hg 
D)  248/130 mm Hg

Question 7

Which of the following changes does not occur when a person engages in heavy exercise?

Accepted Answer

A)  The supply of blood to the active muscles decreases. 
B)  The number of times the heart beats each minute increases dramatically. 
C)  The blood vessels stretch, which allows them to carry more blood. 
D)  The blood pressure in the arteries increases. 
A)  The supply of blood to the active muscles decreases. 
B)  The number of times the heart beats each minute increases dramatically. 
C)  The blood vessels stretch, which allows them to carry more blood. 
D)  The blood pressure in the arteries increases.

Question 8

When a person sits for long periods of time without moving, fluid may accumulate in the feet and ankles. What aspect of a person's body would generally assist the circulatory system in returning this fluid (which is blood plasma) back into the circulation?

Accepted Answer

A)  the movement of skeletal muscle 
B)  the muscular contractions of digestion 
C)  the pull of gravity 
D)  the friction drag within the blood vessels 
A)  the movement of skeletal muscle 
B)  the muscular contractions of digestion 
C)  the pull of gravity 
D)  the friction drag within the blood vessels

Exam 23: The Circulatory System

The three-chambered heart of a frog is ________ [more or less?] efficient than the four-chambered heart of a vertebrate.

The sinoatrial (SA) node is also called the pacemaker of the heart because it determines the _________ at which the heart beats.

The pressure needed to move blood from the body back to the heart is created by the contraction of the

Oxygen is transported to the cells of an insect through its open circulatory system.

Which of the following is not one of the three kinds of human blood vessels?

Which of the following blood pressures would indicate a healthy heart?

Which of the following changes does not occur when a person engages in heavy exercise?

When a person sits for long periods of time without moving, fluid may accumulate in the feet and ankles. What aspect of a person's body would generally assist the circulatory system in returning this fluid (which is blood plasma) back into the circulation?

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

Filters