Question 1

Why does the depolarization wave not travel across the mammalian heart from anterior to posterior (atria to ventricles) in a linear wave?

Accepted Answer

The depolarization wave emanating from t

Question 2

How is vascular resistance related to the Poiseuille equation?

Accepted Answer

Although there is no direct value for re

Question 3

Which concept(s) regarding circulation was(were) not part of the 18th century knowledge base?
I. Tissue blood flow
II. Round trip flow in major vessels
III. Blood transport O2 to tissues
IV. Existence of capillaries
V. Hormones are transported in blood

Accepted Answer

A)  I, II, and III 
B)  III and V 
C)  V 
D)  III 
A)  I, II, and III 
B)  III and V 
C)  V 
D)  III

Question 4

A neurogenic heart and a myogenic heart both have all the neurons attached to it removed. Which of the following is an accurate representation of the result?

Accepted Answer

A)  The neurogenic heart will continue to beat whereas the myogenic heart will cease to beat. 
B)  The neurogenic heart will cease to beat whereas the myogenic heart will continue to beat. 
C)  Both hearts will continue to beat, but at different rates. 
D)  Both hearts will cease to beat. 
A)  The neurogenic heart will continue to beat whereas the myogenic heart will cease to beat. 
B)  The neurogenic heart will cease to beat whereas the myogenic heart will continue to beat. 
C)  Both hearts will continue to beat, but at different rates. 
D)  Both hearts will cease to beat.

Question 5

A squid meets the increased demand for O2 at the tissues during intense exercise by

Accepted Answer

A)  increasing its circulation rate. 
B)  pulling more O2 from the blood. 
C)  both increasing circulation rate and pulling more O2 from the blood. 
D)  making use of anaerobic metabolism only. 
A)  increasing its circulation rate. 
B)  pulling more O2 from the blood. 
C)  both increasing circulation rate and pulling more O2 from the blood. 
D)  making use of anaerobic metabolism only.

Question 6

Refer to the figure shown.
  Which area(s) contain oxygenated blood?

Accepted Answer

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

Question 7

Which statement describes the Frank-Starling mechanism?

Accepted Answer

A)  An increase in the filling time of the ventricles increases the contraction pressure. 
B)  Increasing flow from the heart increases arterial pressure. 
C)  Increasing pressure in the heart increases outflow. 
D)  Stretching of the cardiac muscle increases the force of its contraction at the cellular level. 
A)  An increase in the filling time of the ventricles increases the contraction pressure. 
B)  Increasing flow from the heart increases arterial pressure. 
C)  Increasing pressure in the heart increases outflow. 
D)  Stretching of the cardiac muscle increases the force of its contraction at the cellular level.

Question 8

Small spaces among cells of nonvascular organs and tissues are called

Accepted Answer

A)  lacunae. 
B)  sinuses. 
C)  ostia. 
D)  interstitial. 
A)  lacunae. 
B)  sinuses. 
C)  ostia. 
D)  interstitial.

Question 9

Most crustaceans have _______ hearts.

Accepted Answer

A)  myogenic 
B)  neurogenic 
C)  hemogenic 
D)  non innervated 
A)  myogenic 
B)  neurogenic 
C)  hemogenic 
D)  non innervated

Question 10

Which of the following are similar between an octopus heart and mammalian heart?
I. Myogenic heart
II_ Systemic heart
III. Respiratory pump
IV. Pressure from systemic heart around 120 mm Hg

Accepted Answer

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

Question 11

Refer to the figure shown.
  What is the order of blood flow?

Accepted Answer

A)  I → II → III → IV → V 
B)  I → V → IV → III → II 
C)  I → III → IV → V → II 
D)  IV → V → I → III → II 
A)  I → II → III → IV → V 
B)  I → V → IV → III → II 
C)  I → III → IV → V → II 
D)  IV → V → I → III → II

Question 12

Which statement regarding microcirculatory beds is true?

Accepted Answer

A)  Smooth muscles in the walls of arterioles are responsible for vasoconstriction and vasodilation. 
B)  Anastomoses are the one possible path from an arteriole to a venule. 
C)  The walls of capillaries consist of vascular endothelium and a smooth muscle layer. 
D)  Venules and arterioles are the preeminent sites of O2 and water exchange. 
A)  Smooth muscles in the walls of arterioles are responsible for vasoconstriction and vasodilation. 
B)  Anastomoses are the one possible path from an arteriole to a venule. 
C)  The walls of capillaries consist of vascular endothelium and a smooth muscle layer. 
D)  Venules and arterioles are the preeminent sites of O2 and water exchange.

Exam 25: Circulation

Why does the depolarization wave not travel across the mammalian heart from anterior to posterior (atria to ventricles) in a linear wave?

How is vascular resistance related to the Poiseuille equation?

Which concept(s) regarding circulation was(were) not part of the 18th century knowledge base? I. Tissue blood flow II. Round trip flow in major vessels III. Blood transport O2 to tissues IV. Existence of capillaries V. Hormones are transported in blood

A neurogenic heart and a myogenic heart both have all the neurons attached to it removed. Which of the following is an accurate representation of the result?

A squid meets the increased demand for O2 at the tissues during intense exercise by

Refer to the figure shown. Which area(s) contain oxygenated blood?

Which statement describes the Frank-Starling mechanism?

Small spaces among cells of nonvascular organs and tissues are called

Most crustaceans have _______ hearts.

Which of the following are similar between an octopus heart and mammalian heart? I. Myogenic heart II_ Systemic heart III. Respiratory pump IV. Pressure from systemic heart around 120 mm Hg

Refer to the figure shown. What is the order of blood flow?

Which statement regarding microcirculatory beds is true?

Animals and Environments: Function on the Ecological Stage

Molecules and Cells in Animal Physiology

Genomics, Proteomics, and Related Approaches to Physiology

Physiological Development and Epigenetics

Transport of Solutes and Water

Nutrition, Feeding, and Digestion

Energy Metabolism

Aerobic and Anaerobic Forms of Metabolism

The Energetics of Aerobic Activity

Thermal Relations

Food, Energy, and Temperature at Work: The Lives of Mammals in Frigid Places

Neurons

Synapses

Sensory Processes

Nervous System Organization and Biological Clocks

Endocrine and Neuroendocrine Physiology

Reproduction

Integrating Systems at Work: Animal Navigation

Control of Movement

Muscle

Movement and Muscle at Work: Plasticity in Response to Use and Disuse

Introduction to Oxygen and Carbon Dioxide in Physiology

External Respiration: the Physiology of Breathing

Transport of Oxygen and Carbon Dioxide in Body Fluids With an Introduction to Acid- Base Physiology

Oxygen, Carbon Dioxide, and Internal Transport at Work: Diving by Marine Mammals

Water and Salt Physiology: Introduction and Mechanisms

Kidneys and Excretion With Notes on Nitrogen Excretion

Water, Salts, and Excretion at Work: Mammals of Deserts and Dry Savannas

Water and Salt Physiology of Animals in Their Environments

Filters

Which concept(s) regarding circulation was(were) not part of the 18^th century knowledge base? I. Tissue blood flow II. Round trip flow in major vessels III. Blood transport O₂ to tissues IV. Existence of capillaries V. Hormones are transported in blood

A squid meets the increased demand for O₂ at the tissues during intense exercise by