Circulation and Gas Exchange
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| Gas exchange in the aquatic salamander known as the axolotl is correctly described as | show 🗑
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| show | the slow rate at which diffusion occurs over large distances.
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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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| 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 | show 🗑
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| Which of the following is the correct sequence of blood flow in reptiles and mammals? | show 🗑
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| show | prevent backflow of blood in the aorta and pulmonary arteries.
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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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| The diagnosis of hypertension in adults is based on the | show 🗑
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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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| show | erythropoietin.
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| The meshwork that forms the fabric of a blood clot is | show 🗑
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| show | swallowing
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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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| Countercurrent exchange in the fish gill helps to maximize | show 🗑
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| show | across the finest branches of the trachea and cell membranes
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| Some human infants, especially those born prematurely, suffer serious respiratory failure because of | show 🗑
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| Air rushes into the lungs of humans during inhalation because | show 🗑
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| Breathing is usually regulated by | show 🗑
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| show | the medulla oblongata, which is in contact with cerebrospinal fluid, monitors pH and uses this measure to control breathing.
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| Most carbon dioxide is carried from the body tissues to the lungs _____. | show 🗑
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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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| show | False
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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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| To become bound to hemoglobin for transport in a mammal, atmospheric molecules of oxygen must cross | show 🗑
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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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