True or False 28. A form of whole-body endothermy has been recently discovered i

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True or False 28. A form of whole-body endothermy has been recently discovered in the Opah (Lampris guttatuas Lampridae]). This marine fish generates a substantial amount of heat by flapping its pectoral fins, which propels it through the water, rete mirabile in the gillarches corve ea be delivered to the head and body a. True b. False that warm blood can 29. Fish circulatory systems transport blood to every part of the body to deliver nutrients, gases, and hormones; and to remove metabolic wastes and pathogens, Interactions of hemoglobins with CO2, H+, temperature, and organic phosphates influence both oxygen uptake at the gills and oxygen delivery at metabolizing tissues. The body's changing demands for oxygen and food-derived nutrients stimulate changes in cardiac output. a. True b False 30. The gas-secreting structure of the swimbladders found in derived teleosts and the structure of the he exchange organs found in some large, active oceanic fish are morphologically very similar in the following way. Both involve exchanges, of gas or heat, across blood-vessel walls in a countercure exchange network. b. True b. False Short Answer Questions

Explanation / Answer

28 true opah caught during survey off the west coast, finding their body temperature were regularly warmer than the surrounding water.opah distribute warmed blood throughout body including to the heart enhancing physiological performance

29 b false fish have a single circuit for blood flow and two chambered heart that has only a single atrium and a single ventricle. The atrium collects blood that has returned from the body.while the ventricle pumps the blood to the gills where gas exchange occurs and the blood is deoxygenated this is called gill circulation

30 B false respiration in teleosts as most other fish,is the transfer of gases over thr surface of the gills as water is drawn in through the mouth and pumped out through the gills.apart from the swim bladder which contains small amount of air the body does not have oxygen reverse and respiration need to be continues over the fish's life.they have developed accessory tissue and organs to support gas exchange in there habitats

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