During a landmark radiographic (Xray) study by Bron (1966), regional vasoconstri

Question

During a landmark radiographic (Xray) study by Bron (1966), regional vasoconstriction during a seal's forced diye was indicated by a measured lack of blood flow to the A. lungs. B. brain. C. heart. D. kidneys O. Which of the following statements is supported by the data in the figure? of beadycardia is proportional to dive duration degree of bradycardia is the 0 degree of bradycardia is proportional to dive duration seals, the is inverscly degree of to dive duration E. In freely diving seals, diving heart 25 30 rate varics with dive duration in a Dive duration (min) dives shorter than their species-specific aerobic dive limit (ADL) because doing so time spent underwater recovery time at the surface. C. maximizes the time available for foraging. D. minimizes exposure to predation. E. All of the above C & Which of the following behaviors do Weddell scals not employ in order to reduce metabolic costs during a dive? Mark all that apply. A. Gliding B. Continuous stroking C. Alternating stroking and gliding D. all of the above are utilized to conserve energy E. None of the above utilized to conserve energy When comparing humans to Weddell seals it can be stated that (Mark all that apply) A. Weddell scals have three times the oxygen storing capacity as humans. B. weddell seals raise their metabolic rate about halfas much as humans during exercise. C. both increase heart rate and stroke volume when exercising D. Only Weddell seals redistribute blood flow during exercise. E. both have diving bradycardia.

Explanation / Answer

32. D

a. A

b. A

c. D

d. A and E

Weddell seals have nearly 3 times blood as much as humans.

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