Oxygen and Lungs

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TUTORIAL 2: RESPIRATORY SYSTEM
OBJECTIVE QUESTION 1) High-flying birds are able to obtain enough oxygen even when the air is very thin because A) they have more efficient lungs than other vertebrates. B) they have reduced amounts of hemoglobin in their blood. C) their mitochondria are more efficient than those of other vertebrates. D) their heart can increase or decrease in size as altitude changes. E) they are able to store oxygen in oxygen chambers within muscle cells. 2) If you were to move from around sea level to a much higher altitude, your body would respond with A) profuse sweating. B) a decrease in the diameter and number of capillaries close to your body's surface. C) an increase in energy production. D) a decrease in the affinity of hemoglobin for oxygen. E) an increase in the number of your red blood cells. 3) The reason animals need a continuous supply of oxygen is to A) make carbon dioxide. B) synthesize protein. C) dispose of carbon dioxide. D) carry out glycolysis. E) obtain energy from their food. 4) A waste product of respiration is A) water. B) electrons. C) hydrogen peroxide. D) carbon dioxide. E) glucose. 5) When you exhale, you A) release oxygen and carbon dioxide. B) exchange CO2 for O2. C) take up oxygen and release carbon dioxide to the blood. D) take up carbon dioxide and release oxygen. E) remove CO2 from the body. 6) In the final phase of respiration, body cells A) release CO2 to red blood cells. B) take up O2 from red blood cells. C) increase in size to accommodate the reuptake of O2. D) migrate to the circulatory system. E) release CO2 and take up O2.

7) The body structure where gas exchange occurs is called the A) integumentary surface. B) respiratory surface. C) capillary surface. D) exchange network. E) capillary network. 8) Animals that effectively use their body surface for gas exchange must A) be terrestrial. B) have a high ratio of body surface area to volume. C) have a low ratio of body surface area to volume. D) be aquatic and nearly spherical. E) have a special kind of hemoglobin. 9) Which of the following organisms has a respiratory system that does not require a circulatory system? A) grasshopper B) mouse C) earthworm D) carp E) crayfish 10) Which of the following is likely to have the lowest concentration of O2? A) warm salt water B) cool salt water C) warm fresh water D) cool fresh water E) air 11) The organization of blood and water flow in a fish's gills increases the fish's ability to A) extract oxygen from the water. B) extract carbon dioxide from the water. C) detect toxic materials in the water. D) transport blood throughout the fish's body. E) regulate fluid excretion from the body. 12) Which of the following statements about fish gills is true? A) They have a surface area that is much greater than the body surface. B) They aid in reproduction. C) Because of their efficiency, they only need a small surface area. D) They have a poor blood supply. E) Like lungs, they have an exhale/inhale function. 13) The chief advantage of gas exchange in water is that A) water can contain more oxygen than air. B) carbon dioxide is easier to eliminate in water than in air. C) no energy is used to keep the exchange surface wet. D) less energy is required to ventilate gills as compared to lungs. E) contact between the respiratory surface and the gas-containing medium is more efficient in water

than in air. 14) Gills are unsuitable for animals living on land because A) the large surface area of gills would allow dehydration of the animal. B) air cannot diffuse across the gill surface. C) there is no way to get air into the gills. D) gills require high blood pressure. E) gills do not function well in animals that have a diaphragm. 15) In the countercurrent exchange system of fish gills, A) blood and water flow in the same direction. B) blood and water flow in opposite directions. C) blood and water are separated by a thick polysaccharide barrier. D) blood flow in the gills reverses...
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