<div id=\"part_id5791045\" class=\"partVisible\">Part B - Overview of
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<div id="part_id5791045" class="partVisible">Part B - Overview of countercurrent heat exchangers</div><div class="partText">The images below show two countercurrent heat exchangers in marine animals: in the flipper of a sea turtle (left) and in the abdomen of a dolphin (right). <br /><strong> </strong>
<p><img src="http://session.masteringbiology.com/problemAsset/1098960/31/1098960_002.jpg" alt="" width="320" height="290" /> <img src="http://session.masteringbiology.com/problemAsset/1098960/31/1098960_003.jpg" alt="" width="320" height="260" /></p>
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<div class="partInstructions"><strong>Which <em>three</em> of the following statements are consistent with the images?</strong></div>
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<td valign="center"><span class="multipleChoiceOption"><label for="answer_id5779799_val1">In a sea turtle's flippers, heat is transferred from (3) to (1).</label></span></td>
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<td valign="center"><input id="answer_id5779799_val3" name="answer_id5779799" type="checkbox" value="3" /></td>
<td valign="center"><span class="multipleChoiceOption"><label for="answer_id5779799_val3">In a sea turtle, blood warms as it flows from the body (1) to the tip of the flipper (2).</label></span></td>
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<td valign="center"><span class="multipleChoiceOption"><label for="answer_id5779799_val8">In a sea turtle's flippers, heat is transferred from (1) to (3).</label></span></td>
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<td valign="center"><input id="answer_id5779799_val2" name="answer_id5779799" type="checkbox" value="2" /></td>
<td valign="center"><span class="multipleChoiceOption"><label for="answer_id5779799_val2">At a dolphin's testes, heat is transferred from (2) to (1).</label></span></td>
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<td valign="center"><input id="answer_id5779799_val4" name="answer_id5779799" type="checkbox" value="4" /></td>
<td valign="center"><span class="multipleChoiceOption"><label for="answer_id5779799_val4">In a dolphin, blood cools as it flows from the aorta to the testes.</label></span></td>
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<td valign="center"><span class="multipleChoiceOption"><label for="answer_id5779799_val7">At a dolphin's testes, heat is transferred from (1) to (2).</label></span></td>
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<div class="m"> _____________</div>
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<div id="part_id5780534" class="partVisible">Part C - Identifying modes of thermoregulation</div>
<div class="partText">Animals can be classified according to their mode of thermoregulation. Sort the animals below, indicating their likely thermoregulatory strategy. Note that poikilotherms are sometimes referred to as heterotherms.</div>
<div class="partInstructions">Drag each animal to the appropriate bin.</div>
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<div class="m">walrus                                 </div>
<div class="m">butterfly</div>
<div class="m">arctic shrimp                  </div>
<div class="m">coyote</div>
<div class="m">frishwater</div>
<div class="m">eagle</div>
<div class="m">salamander</div>
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<div class="m">is they </div>
<div class="m">homeothermic  endotherm<span> </span>    or </div>
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<div class="m"><span>homeothermic<br /></span>enctotherm                            or </div>
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<div class="m">or poikolothermic ectotherm           </div>
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