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Why is the catalytic sequence leading to blood clotting so complex? Wouldn't it make evolutionary and metabolic sense to have a more immediate and much shorter biochemical sequence leading to blood clotting?

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The complexity of the blood clotting cas...

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Which blood vessels will have walls only one cell thick?


A) Capillaries
B) Venules
C) Veins
D) Arterioles
E) Arteries

F) A) and B)
G) A) and E)

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The lymphatic system drains lymph back into the


A) large intestine.
B) heart.
C) vena cava.
D) veins of the liver.
E) veins of the lower neck.

F) All of the above
G) A) and B)

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Describe the differences between insect and vertebrate ventilation.Which one is more effective in terms of being able to function without oxygen debt?

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Insect and vertebrate ventilation system...

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Discern between a myogenic and a neurogenic heart.What types of organisms possess each?

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A myogenic heart is one in which the hea...

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If a person has a blood pressure of 110/60,the "110" refers to the


A) diastolic pressure.
B) systolic pressure.
C) pulse pressure.
D) capillary pressure.
E) venous pressure.

F) B) and D)
G) All of the above

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B

The blood vessel that delivers oxygen and nutrients to the heart is the ________ ________.

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A dung beetle journeys into a ball of dung to lay eggs.To avoid being poisoned by the noxious gases,it closes its


A) papulae.
B) branchial tufts.
C) book lungs.
D) bronchi.
E) spiracles.

F) All of the above
G) A) and D)

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Outline the structures and functions of the mammalian respiratory system.

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The mammalian respiratory system is comp...

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Briefly discuss the functions of the many inorganic and organic substances in solution within body fluids.

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Inorganic and organic substances in body...

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In some invertebrates,if we cut the nerves leading to the heart and the heart stops beating,the heart is considered


A) an open system.
B) myogenic.
C) neurogenic.
D) a deferred pacemaker.
E) asynchronous.

F) All of the above
G) A) and C)

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Interstitial fluid is constantly formed by


A) the lymphatic system producing it.
B) lightweight elements in the blood plasma filtered through capillary walls.
C) absorption across the gut lining.
D) absorption across the lung surface.
E) reabsorption in the kidney tubules.

F) All of the above
G) A) and B)

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Which association is NOT correct?


A) Pleura-lung and chest epithelium
B) Trachea-windpipe
C) Alveoli-gas exchange
D) Esophagus-vocal cords
E) Nasal-inhalation

F) C) and D)
G) B) and E)

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The lower affinity of hemoglobin for oxygen in the presence of increased carbon dioxide is called the _______ ________.

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The ____________ is involved with pumping blood to and from the lungs.


A) systemic circuit
B) internal respiration circuit
C) hepatic circuit
D) pulmonary circuit
E) renal circuit

F) D) and E)
G) B) and D)

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In the tetrapod heart,the pacemaker is the


A) atrioventricular bundle.
B) purkinje fibers.
C) vagus nerves.
D) cardiac control center.
E) Sinoatrial (SA) node.

F) All of the above
G) A) and E)

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Oxygenated blood enters the heart at the


A) left atrium.
B) left ventricle.
C) right atrium.
D) right ventricle.
E) None of the choices is correct

F) A) and D)
G) None of the above

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A

The atrioventricular valves separate the atria from the ventricles in the heart,and the ___________ valves prevent backflow from the pulmonary artery and the aorta.

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The volume of blood forced from either ventricle each minute is known as _________ _________.

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In multicellular animals,body fluids are divided into two main phases,


A) blood plasma and interstitial fluid.
B) blood plasma and lymph.
C) bloodstream and digestive fluids.
D) bloodstream and cerebrospinal fluids.
E) intracellular and extracellular.

F) A) and E)
G) A) and B)

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E

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