According to the Fick equation, the fish gill is an effective gas exchange surface because... A. It has a high blood-to-water diffusion distance B. The total surface area of the lamellae is very large C. The scaphognathite maintains a constant flow of water across the gill D. The gill tissue is supported by the surrounding water E. All of the above
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- a) Gill lice infections result in lowered surface area to volume ratios in fish gill structure. True False Levels of carbon dioxide in the blood will not differ between infected and uninfected fish. Question options: True False The branched nature of capillaries in fish gills increases surface area, and thus the efficiency of exchange into/out of the blood stream lation. Question opti True FalseSharks and bony fishes approach or achieve neutral buoyancy in different ways. Describe the methods evolved in each group. Why must a teleost fish adjust the gas volume in its swim blad-der when it swims upward or downward? How is gas volume adjusted?The countercurrent exchange system for gills relies on diffusion to diffuse oxygen into the blood. This system works because the blood in the gills. a. increasing encounters [Select] b. decreasing water as the blood moves from [Select] a. arteries [Select] b. capillaries c. Veins ✰ concentrations of oxygen in the a.arteries b. capillaries to C. veins through the capillaries. This also ensures that a. less blood always has [Select] b. more c. the same amount of oxygen than the water for continued diffusion.
- You receive animal care and use committee approval to catch a fish, prop open its operculum (gill cover), tie a string around its tail, and tow it backwards through the water for experimental purposes. The fish is then released unharmed. This action forces water to flow backwards over the gill filaments and in between the gill lamellae. What effect would this backwards water flow have on respiration? It would reduce efficiency of gas exchange between water and blood The only effect would be due to the fish's discomfort from this treatment. O It would improve efficiency of gas exchange between water and bloodWhich of the following will increase the rate of O2 uptake by a lobster? A. Increasing the partial pressure of O₂ in the hemolymph (i.e. blood) of the lobster B. Increasing the flow of water over the gill (i.e. increasing ventilation) C. Increasing the thickness (i.e. the hemolymph-to-water distance) of the gill D. Increasing the surface area of the scaphognathite E. All of the aboveWhich of the following is a true statement? A. The concentration of oxygen in water is greater than that in air. B. In animals with gills, ventilation helps to reduce the thickness of the boundary layer. C. Countercurrent flow at the gas-exchange surface results in the diffusion gradient across surface. D. Mammalian lungs requires the diaphragm because the lungs are relatively stiff and filled with parabronchi.
- 1. Describe the mechanism involved in the exchange of gases in the aquatic vertebrates. counter current oxygen exchange wherein blood and water flows through the gills in opposite directions. 2. Discuss the importance of the contraction and relaxation of the mammalian diaphragm in breathing.SOURCE: Gills are the main site of gas exchange in almost all fishes. The gills consist of bony or cartilaginously stiffened arches that anchor pairs of gill filaments. In sharks, the pairs of gill filaments are separated by a fleshy septum. The numerous, minute lamellae that protrude from both sides of each filament are the primary sites of gas exchange; however, not all the blood flow in the gills is directed to the lamellae. "Nonrespiratory basal blood channels or venolymphatic simuses may carry a significant fraction of the gall blood found that resting rainbow trout perfused approximately 58% of their lamellae with blood. Trout in hypoxic (low dissolved oxygen) water or injected with epinepherine (eg. simulating stress or excitement) perfused more than 70% of their lamellae. Conversely, injections of acetylcholine decreased perfused lamellae to approximately 43%. These results indicate that rainbow trout can increase the number of lamellae that are used in respiration as the…O The toxin causes inappropriate firing of neurons leading to periods of rapid twitching that infected individuals experience as summation leading to tetanus. QUESTION 6 Mammalian lungs are very different in structure compared to amphibian lungs. The lungs of mammals have highly complex branching patterns of airways. The lungs of amphibians are simpler and more sac-like. Over all, the lungs of mammals are capable of much greater rates of gas exchange compared to amphibians. Why is this? O The more complex structure provides more surface area across which gas exchange can occur. O A complex structure means that gases have more contact time with gases compared to a simpler structure. O Mammalian lungs are usually much bigger relative to their bodies compared to amphibian lungs. O The respiratory membranes of mammals are able to diffuse gases across them much faster than amphibians. QUESTION 7 Click Save and Submit to save and submit. Click Save All Answers to save all answers. P Type…
- Gas transport in mammalian bodies happens through the alternation of two processes. In the circulatory system gasses are transported by To pass into the tissues gases are transported by ...consilience; ...osmosis () ...circulation; ...active transport ) .conduction; ..diffusion O..convection ...diffusion O O OOO The toxin causes inappropriate firing of neurons leading to periods of rapid twitching that infected individuals experience as surnmation leading to tetanus. QUESTION 6 Mammalian lungs are very different in structure compared to amphibian lungs. The lungs of mammals have highly complex branching patterns of airways. The lungs of amphibians are simpler and more sac-like. Over all, the lungs of mammals are capable of much greater rates of gas exchange compared to amphibians. Why is this? O The more complex structure provides more surface area across which gas exchange can occur. O A complex structure means that gases have more contact time with gases compared to a simpler structure. O Mammalian lungs are usually much bigger relative to their bodies compared to amphibian lungs. O The respiratory membranes of mammals are able to diffuse gases across them much faster than amphibians. QUESTION 7 Click Save and Submit to sve and submit. Click Save AL Answers to save all answers. P Type here…In______, gas exchange occurs at the body surface and gas is distributed by diffusion alone. a. earthworm c. frogs b. flatworms d. insects