Question 1

Damage to the sinoatrial node in humans

Accepted Answer

A) is a major contributor to heart attacks. 
B) would block conductance between the bundle branches and the Purkinje fibers. 
C) would have a negative effect on peripheral resistance. 
D) would disrupt the rate and timing of cardiac muscle contractions. 
E) would have a direct effect on blood pressure monitors in the aorta. 
A) is a major contributor to heart attacks. 
B) would block conductance between the bundle branches and the Purkinje fibers. 
C) would have a negative effect on peripheral resistance. 
D) would disrupt the rate and timing of cardiac muscle contractions. 
E) would have a direct effect on blood pressure monitors in the aorta.

Question 2

Vasoconstriction in the gut is a likely response when an individual is

Accepted Answer

A) lying down after standing up. 
B) standing up after lying down. 
C) stressed and secreting stress hormones. 
D) responding to increased blood pressure. 
E) having an allergy attack with lots of histamine secretion. 
A) lying down after standing up. 
B) standing up after lying down. 
C) stressed and secreting stress hormones. 
D) responding to increased blood pressure. 
E) having an allergy attack with lots of histamine secretion.

Question 3

Which of the following conditions would most likely be due to high blood pressure in a mammal?

Accepted Answer

A) bursting of blood vessels in capillary beds 
B) inability of the right ventricle to contract 
C) reversal of normal blood flow direction in arteries 
D) destruction of red blood cells 
E) forceful contraction of the atria 
A) bursting of blood vessels in capillary beds 
B) inability of the right ventricle to contract 
C) reversal of normal blood flow direction in arteries 
D) destruction of red blood cells 
E) forceful contraction of the atria

Question 4

A human red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in the thumb.To travel from the artery in the arm to the left ventricle,this red blood cell must pass through

Accepted Answer

A) one capillary bed. 
B) two capillary beds. 
C) three capillary beds. 
D) four capillary beds. 
E) five capillary beds. 
A) one capillary bed. 
B) two capillary beds. 
C) three capillary beds. 
D) four capillary beds. 
E) five capillary beds.

Question 5

Use the following information to answer the next few questions.
A paramedic arrives at a middle-aged man's home.The man is complaining of chest pain and shortness of breath.Upon examination of his medicine cabinet,the paramedic finds prescription bottles of statins and aspirin.
-The man can reduce the chance of recurrence of symptoms by
I.reducing his LDL:HDL ratio.
II.exercising on a regular basis.
III.quitting smoking cigarettes.
IV.reducing consumption of trans fats.

Accepted Answer

A) I only 
B) I and II 
C) II and III 
D) I, II, and III 
E) I, II, III, and IV 
A) I only 
B) I and II 
C) II and III 
D) I, II, and III 
E) I, II, III, and IV

Question 6

Flying insects do all of the following except

Accepted Answer

A) increase metabolism as much as 200-fold during flight. 
B) switch from diffusion of tracheal gases to active transport during flight. 
C) utilize high numbers of mitochondria in flight muscles. 
D) produce water molecules from oxygen in mitochondria. 
E) generate carbon dioxide from catabolism of fuel molecules. 
A) increase metabolism as much as 200-fold during flight. 
B) switch from diffusion of tracheal gases to active transport during flight. 
C) utilize high numbers of mitochondria in flight muscles. 
D) produce water molecules from oxygen in mitochondria. 
E) generate carbon dioxide from catabolism of fuel molecules.

Question 7

Which of the following is the correct sequence of blood flow in reptiles and mammals?

Accepted Answer

A) left ventricle → aorta → lungs → systemic circulation 
B) right ventricle → pulmonary vein → pulmocutaneous circulation 
C) pulmonary vein → left atrium → left ventricle → pulmonary circuit 
D) vena cava → right atrium → right ventricle → pulmonary circuit 
E) right atrium → pulmonary artery → left atrium → ventricle 
A) left ventricle → aorta → lungs → systemic circulation 
B) right ventricle → pulmonary vein → pulmocutaneous circulation 
C) pulmonary vein → left atrium → left ventricle → pulmonary circuit 
D) vena cava → right atrium → right ventricle → pulmonary circuit 
E) right atrium → pulmonary artery → left atrium → ventricle

Question 8

What will be the long-term effect of blocking the lymphatic vessels associated with a capillary bed?

Accepted Answer

A) more fluid entering the venous capillaries 
B) an increase in the blood pressure in the capillary bed 
C) the accumulation of more fluid in the interstitial areas 
D) fewer proteins leaking out of the blood to enter the interstitial fluid 
E) the area of the blockage becoming abnormally small 
A) more fluid entering the venous capillaries 
B) an increase in the blood pressure in the capillary bed 
C) the accumulation of more fluid in the interstitial areas 
D) fewer proteins leaking out of the blood to enter the interstitial fluid 
E) the area of the blockage becoming abnormally small

Question 9

When do atria contract?

Accepted Answer

A) just prior to the beginning of diastole 
B) during diastole 
C) immediately after systole 
D) during systole 
E) just prior to the beginning of systole 
A) just prior to the beginning of diastole 
B) during diastole 
C) immediately after systole 
D) during systole 
E) just prior to the beginning of systole

Question 10

The plasma proteins in humans

Accepted Answer

A) maintain the blood's osmotic pressure. 
B) transport water-soluble lipids. 
C) carry out gas exchange. 
D) undergo aerobic metabolism. 
E) transport oxygen. 
A) maintain the blood's osmotic pressure. 
B) transport water-soluble lipids. 
C) carry out gas exchange. 
D) undergo aerobic metabolism. 
E) transport oxygen.

Question 11

Use the following information to answer the questions below.
At a crime scene,an analyst finds a large pool of blood.After centrifugation,it was determined that the blood belonged to a hemophiliac suffering from an acute infection.
-Which of the following are not involved in the clotting process?

Accepted Answer

A) fibrinogen 
B) thrombin 
C) platelets 
D) albumin 
E) fibrin 
A) fibrinogen 
B) thrombin 
C) platelets 
D) albumin 
E) fibrin

Question 12

Which of the following reactions prevails in red blood cells traveling through alveolar capillaries? (Hb = hemoglobin)

Accepted Answer

A) Hb + 4 O₂ → Hb(O₂)₄ 
B) Hb(O₂)₄ → Hb + 4 O₂ 
C) CO₂ + H₂O → H₂CO₃ 
D) H₂CO₃ → H⁺ + HCO₃- 
E) Hb + 4 CO₂ → Hb(CO₂)₄ 
A) Hb + 4 O₂ → Hb(O₂)₄ 
B) Hb(O₂)₄ → Hb + 4 O₂ 
C) CO₂ + H₂O → H₂CO₃ 
D) H₂CO₃ → H⁺ + HCO₃- 
E) Hb + 4 CO₂ → Hb(CO₂)₄

Exam 42: Circulation and Gas Exchange

Damage to the sinoatrial node in humans

Vasoconstriction in the gut is a likely response when an individual is

Which of the following conditions would most likely be due to high blood pressure in a mammal?

A human red blood cell in an artery of the left arm is on its way to deliver oxygen to a cell in the thumb.To travel from the artery in the arm to the left ventricle,this red blood cell must pass through

Flying insects do all of the following except

Which of the following is the correct sequence of blood flow in reptiles and mammals?

What will be the long-term effect of blocking the lymphatic vessels associated with a capillary bed?

When do atria contract?

The plasma proteins in humans

Use the following information to answer the questions below. At a crime scene,an analyst finds a large pool of blood.After centrifugation,it was determined that the blood belonged to a hemophiliac suffering from an acute infection. -Which of the following are not involved in the clotting process?

Which of the following reactions prevails in red blood cells traveling through alveolar capillaries? (Hb = hemoglobin)

Introduction: Evolution and Themes of Biology

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Plant Structure,Growth,and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons,Synapses,and Signalling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behaviour

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

Filters