Question 1

Select the proper order of the propagation of an electrical (depolarization)signal in the heart. ​

Accepted Answer

A) AV node → Purkinje fibers → SA node ​ 
B) AV node → SA node → Purkinje fibers 
C) Purkinje fibers → AV node → SA node 
D) Purkinje fibers → SA node → AV node 
E) ​SA node → AV node → Purkinje fibers 
A) AV node → Purkinje fibers → SA node ​ 
B) AV node → SA node → Purkinje fibers 
C) Purkinje fibers → AV node → SA node 
D) Purkinje fibers → SA node → AV node 
E) ​SA node → AV node → Purkinje fibers

Question 2

Signals from the atrioventricular (AV)node are carried to the bottom of the heart by ____. ​

Accepted Answer

A) the sinoatrial (SV)node ​ 
B) Purkinje fibers 
C) pacemaker cells 
D) neurogenic cells 
E) the polarization node 
A) the sinoatrial (SV)node ​ 
B) Purkinje fibers 
C) pacemaker cells 
D) neurogenic cells 
E) the polarization node

Question 3

Atherosclerosis ____. ​

Accepted Answer

A) decreases arterial lumen size ​ 
B) affects the diameter of veins 
C) has no effect on arterial lumen size 
D) increases arterial lumen size 
E) presents many clinical symptoms immediately 
A) decreases arterial lumen size ​ 
B) affects the diameter of veins 
C) has no effect on arterial lumen size 
D) increases arterial lumen size 
E) presents many clinical symptoms immediately

Question 4

Why are veins less elastic than arteries?

Accepted Answer

When blood enters the arteries, it is tr

Question 5

Why would an iron deficiency result in anemia? ​

Accepted Answer

A hemoglobin molecule has an iron atom a

Question 6

Match between columns
                        Premises: left ventricle

Accepted Answer

The Answer of B and A and  C and is...

Question 7

While running, ____. ​

Accepted Answer

A) only diastolic blood pressure increases ​ 
B) only systolic blood pressure increases 
C) both diastolic and systolic blood pressures increase 
D) both diastolic and systolic blood pressures decrease 
E) there would be no change in either diastolic or systolic blood pressure 
A) only diastolic blood pressure increases ​ 
B) only systolic blood pressure increases 
C) both diastolic and systolic blood pressures increase 
D) both diastolic and systolic blood pressures decrease 
E) there would be no change in either diastolic or systolic blood pressure

Question 8

Lymph moves throughout the lymph vessels due to ____. ​

Accepted Answer

A) contraction of the heart ​ 
B) conscious actions 
C) constriction of blood vessels 
D) dilation of blood vessels 
E) skeletal muscle and breathing movements 
A) contraction of the heart ​ 
B) conscious actions 
C) constriction of blood vessels 
D) dilation of blood vessels 
E) skeletal muscle and breathing movements

Question 9

The ____ are the smallest vessels that carry blood in the body. ​

Accepted Answer

A) arterioles ​ 
B) arteries 
C) capillaries 
D) veins 
E) venules 
A) arterioles ​ 
B) arteries 
C) capillaries 
D) veins 
E) venules

Question 10

Atherosclerosis has its most serious effects in the ____. ​

Accepted Answer

A) extremities 
B) coronary arteries 
C) pulmonary arteries 
D) brain 
E) heart muscle cells 
A) extremities 
B) coronary arteries 
C) pulmonary arteries 
D) brain 
E) heart muscle cells

Question 11

Match between columns
                        Premises: superior vena cava

Accepted Answer

The Answer of  I and B and  H is...

Question 12

Match between columns
                        Premises: pulmonary arteries

Accepted Answer

The Answer of  C and  L and  is...

Question 13

Lymph nodes normally contain ____, which function to engulf invading organisms. ​

Accepted Answer

A) erythrocytes 
B) macrophages ​ 
C) platelets 
D) neutrophils 
E) basophils 
A) erythrocytes 
B) macrophages ​ 
C) platelets 
D) neutrophils 
E) basophils

Question 14

Which substance or cell is too large to pass through capillary walls? ​

Accepted Answer

A) erythrocytes 
B) glucose 
C) ions 
D) water 
E) carbon dioxide 
A) erythrocytes 
B) glucose 
C) ions 
D) water 
E) carbon dioxide

Question 15

The main danger from deep vein thrombosis is ____. ​

Accepted Answer

A) a clot breaking loose and moving elsewhere in the body ​ 
B) unsightly veins 
C) loss of blood flow in the extremities 
D) blood pooling below the heart 
E) a clot dispersing without warning 
A) a clot breaking loose and moving elsewhere in the body ​ 
B) unsightly veins 
C) loss of blood flow in the extremities 
D) blood pooling below the heart 
E) a clot dispersing without warning

Question 16

In healthy adult humans, normal systolic pressure is ____ mm Hg and normal diastolic pressure is ____ mm Hg. ​

Accepted Answer

A) 20 to 50; 5 to 20 ​ 
B) 60 to 80; 90 to 120 
C) 90 to 120; 60 to 80 
D) 90 to 120; 130 to 150 
E) 130 to 150; 90 to 120 
A) 20 to 50; 5 to 20 ​ 
B) 60 to 80; 90 to 120 
C) 90 to 120; 60 to 80 
D) 90 to 120; 130 to 150 
E) 130 to 150; 90 to 120

Question 17

The main function of erythrocytes is to ____. ​

Accepted Answer

A) carry oxygen ​ 
B) form clots 
C) fight off infections 
D) produce blood cells 
E) secrete erythropoietin 
A) carry oxygen ​ 
B) form clots 
C) fight off infections 
D) produce blood cells 
E) secrete erythropoietin

Question 18

Which type of blood cell is produced from lymphoid stem cells? ​

Accepted Answer

A) basophils 
B) B lymphocytes 
C) eosinophils 
D) erythrocytes 
E) neutrophils 
A) basophils 
B) B lymphocytes 
C) eosinophils 
D) erythrocytes 
E) neutrophils

Question 19

Bulk flow in capillaries is driven by ____. ​

Accepted Answer

A) gravity ​ 
B) concentration gradients 
C) actual blood pressure 
D) pumping of the heart 
E) reciprocal exchange with oxygen 
A) gravity ​ 
B) concentration gradients 
C) actual blood pressure 
D) pumping of the heart 
E) reciprocal exchange with oxygen

Question 20

In the average human, the heart beats ____ times per minute. ​

Accepted Answer

A) 10 ​ 
B) 53 
C) 72 
D) 95 
E) 120 
A) 10 ​ 
B) 53 
C) 72 
D) 95 
E) 120

Exam 44: The Circulatory System

Select the proper order of the propagation of an electrical (depolarization)signal in the heart. ​

Signals from the atrioventricular (AV)node are carried to the bottom of the heart by ____. ​

Atherosclerosis ____. ​

Why are veins less elastic than arteries?

Why would an iron deficiency result in anemia? ​

While running, ____. ​

Lymph moves throughout the lymph vessels due to ____. ​

The ____ are the smallest vessels that carry blood in the body. ​

Atherosclerosis has its most serious effects in the ____. ​

Lymph nodes normally contain ____, which function to engulf invading organisms. ​

Which substance or cell is too large to pass through capillary walls? ​

The main danger from deep vein thrombosis is ____. ​

In healthy adult humans, normal systolic pressure is ____ mm Hg and normal diastolic pressure is ____ mm Hg. ​

The main function of erythrocytes is to ____. ​

Which type of blood cell is produced from lymphoid stem cells? ​

Bulk flow in capillaries is driven by ____. ​

In the average human, the heart beats ____ times per minute. ​

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

DNA Structure, Replication, and Organization

From DNA to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technologies: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

Defenses Against Disease

Gas Exchange: the Respiratory System

Animal Nutrition

Regulating the Internal Environment

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

Select the proper order of the propagation of an electrical (depolarization)signal in the heart.

Signals from the atrioventricular (AV)node are carried to the bottom of the heart by ____.

Atherosclerosis ____.

Why would an iron deficiency result in anemia?

While running, ____.

Lymph moves throughout the lymph vessels due to ____.

The ____ are the smallest vessels that carry blood in the body.

Atherosclerosis has its most serious effects in the ____.

Lymph nodes normally contain ____, which function to engulf invading organisms.

Which substance or cell is too large to pass through capillary walls?

The main danger from deep vein thrombosis is ____.

In healthy adult humans, normal systolic pressure is mm Hg and normal diastolic pressure is mm Hg.

The main function of erythrocytes is to ____.

Which type of blood cell is produced from lymphoid stem cells?

Bulk flow in capillaries is driven by ____.

In the average human, the heart beats ____ times per minute.