Question

True or False 28. A form of whole-body endothermy has been recently discovered in the ipidac. This marine fish generates a substantial amount of heat by tlapping its pectoral Opah (Lampris guta which propels it through the water; rete mirabile in thegil arches conserve heat so that warm blood can be delivered to the head and body a. True b. False 29. Fish circulatory systems transport blood to every part of the body to deliver nutrients, gases with CO2, H temperature, and organic phosphates influence both oxygen uptake at the gills and oxysen deivery metabolizing tissues. The body's ehanging demands for oxygen and food-derived nutrierts changes in cardiac output. a. True bFalse of the heat- The gas-secreting structure of the swimbladders found in derived teleosts and the structure exchange organs found in some large, active oceanie fish are morphologically very similiar in he 30· following way. Both involve exchanges, of gas or heat, across blood-vessel walls in a exchange network. b. True b False Short Answer Questions SA1. Define a typical fish. (In your definition, list six defining characteristics.) SA2. How do most fishes swim by means of forward propalsion? Describe and illustrate the basic mechanism. SA3. Define the following structures: ventral aorta, branchial arch, afferent and efferent branchial arteries. SA4. Sketch/label a gill filament and the lamellac of a bony fish; show directions of water flow and blood flow Indicate which blood vessels contain oxygen-poor and oxygen-rich blood. Use the back of the page

Answer 1

Answer 28: True.

Endothermy is the metabolic production and retention of heat to warm body temperature above ambient and Opah does this by the flapping of its pectoral fin and minimizes heat loss through a series of counter-current heat exchangers within its gills.