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What would happen to the breathing rate of a mammal that is masked and must...


A) Its breathing rate would increase in response to more carbon dioxide.
B) Its breathing rate would increase in response to less oxygen in the blood.
C) Its breathing rate would slow down as it suffocated.
D) It is not possible to predict since breathing rate is controlled consciously in mammals.
E) None of the choices are correct

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

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Describe the components of vertebrate plasma and vertebrate "formed" elements.

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Vertebrate plasma is the liquid componen...

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Compare the structure of a major vein with that of a major artery.Why are the two so different?

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The structure of a major vein and a majo...

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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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Outline the formation of red blood cells and white blood cells.Why have red blood cells (erythrocytes)lost their nucleus?

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Red blood cells (erythrocytes) and white...

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The mammalian lung is filled with millions of small air sacs called _______________.

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______________ engulf spent erythrocytes.

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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) A) and C)
G) C) and D)

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About two-thirds of waste carbon dioxide is carried back to the lungs in higher animals by


A) by red blood cells on the empty hemes.
B) by dissolved in blood plasma as bicarbonate and hydrogen ions.
C) by dissolved in lymph in lymph ducts.
D) by on myoglobins.
E) None of the choices are correct

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

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Oxygen is carried in circulation primarily


A) as a dissolved gas in the plasma.
B) as carbonic acid.
C) bound to hemoglobin in the red blood cells.
D) by white blood cells.
E) None of the choices are correct

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

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Explain the reason for the differences in blood pressure during systole and diastole.

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The differences in blood pressure during...

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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) C) and D)
G) A) and E)

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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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Contraction of the right ventricle forces blood initially into the


A) left atrium.
B) right atrium.
C) aorta.
D) pulmonary vein.
E) pulmonary artery.

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

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An enzyme that catalyzes the formation of fibrin from fibrinogen is ___________________.

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The name of the instrument that we use to measure blood pressure is the ______________.

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In the efficient double circulation of birds and mammals,the blood goes through a systemic circuit and a _______________ circuit.

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The _____________ are minute,incomplete cells that release substances to initiate the process leading to blood coagulation.

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The heartbeat originates in specialized muscle tissue called the _______ _______ in the sinoatrial node

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Extracellular fluid is subdivided into


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 B)
G) B) and E)

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