Circulation and Gas Exchange
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| show | simple diffusion of oxygen into the salamander from the water.
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| Circulatory systems compensate for | show 🗑
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| The fluid that moves around in the circulatory system of a typical arthropod is | show 🗑
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| The circulatory system of bony fishes, rays, and sharks is similar to | show 🗑
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| The only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart are the | show 🗑
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| show | systole of the left ventricle
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| show | 2 capillary beds
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| Which of the following is the correct sequence of blood flow in reptiles and mammals? | show 🗑
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| The semilunar valves of the mammalian heart | show 🗑
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| show | epinephrine.
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| An increased concentration of nitric oxide within a vascular bed is associated with | show 🗑
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| Small swollen areas in the neck, groin, and axillary region are associated with | show 🗑
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| show | giraffe
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| The velocity of blood flow is the lowest in capillaries because | show 🗑
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| What will be the long-term effect of blocking the lymphatic vessels associated with a capillary bed? | show 🗑
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| show | blood pressure being greater than 140 mm Hg systolic and/or >90 diastolic.
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| Vasoconstriction of blood vessels delivering blood to the gut is a likely response when an individual is | show 🗑
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| In a healthy human, the typical life span of a red blood cell is | show 🗑
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| The hormone that stimulates the production of red blood cells, and the organ where this hormone is synthesized, are | show 🗑
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| show | I and III only
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| Cyanide poisons mitochondria by blocking the final step in the electron transport chain. Human red blood cells placed in an isotonic solution containing cyanide are likely to | show 🗑
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| The production of red blood cells is stimulated by | show 🗑
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| The meshwork that forms the fabric of a blood clot is | show 🗑
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| The epiglottis of a human covers the glottis when he or she is | show 🗑
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| In mammals, most gas exchange between the atmosphere and the pulmonary blood occurs in the | show 🗑
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| Countercurrent exchange is evident in | show 🗑
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| show | diffusion
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| Air-breathing insects carry out gas exchange | show 🗑
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| show | lung collapse due to inadequate production of surfactant.
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| Air rushes into the lungs of humans during inhalation because | show 🗑
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| show | CO2 and O2 concentration and pH-level sensors
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| Carbon dioxide levels in the blood and cerebrospinal fluid affect its pH. This enables the organism to sense a disturbance in gas levels as | show 🗑
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| show | as bicarbonate ions (HCO3 -)
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| By picking up hydrogen ions, hemoglobin prevents the blood from becoming too _____. | show 🗑
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| show | True
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| True or false? The pressure inside the human chest cavity is always positive, so the lungs stay relatively inflated even upon exhalation | show 🗑
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| True or false? The driving force for the unloading of oxygen from hemoglobin into tissues is the difference in PCO2 levels between the blood and body tissues. | show 🗑
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| show | 5 membranes
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| show | myoglobin
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| show | converted to bicarbonate ions by an enzyme in red blood cells.
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| show | vessel or vessels connecting two capillary beds.
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| show | closed circulatory system
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| show | nearly all of their cells are in direct contact with the external environment.
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| Pulse is a direct measure of | show 🗑
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