Exam 25: Control of Body Temperature and Water Balance

Urine flows from the collecting duct into the

Animals that maintain internal body temperature using heat generated by their own metabolism are called

The following questions relate to the three figures above, which indicate how the tubules in the kidney respond to the administration of the hormone vasopressin (AVP). -The hypothesis that scientists who collected these data were most likely testing is that

It is a cool winter evening, and you are feeling a little chilled. To warm yourself up you sip some hot tea. As you swallow, you can feel the tea warm your mouth and throat. The drink is warming you up by the process of

Cormorants are sea-dwelling birds that consume high levels of salt from the seawater they drink. To get rid of this excess salt, cormorants "sneeze" out the salt that has collected in a localized area near their sinuses. This process is an example of

Scientists studied the thermoregulatory and osmoregulatory responses in exercising human subjects who were experiencing different levels of dehydration (0%, 3%, 5%, and 7% based on body weight). After exercise, the subjects' body temperatures, sweating rates, and blood solute concentrations were measured. Their results are shown in these three graphs. Note that only sweating rate was measured after each bout of exercise. Body temperature was measured after the first two bouts of exercise, and blood solutes after only the first bout of exercise. Source: Adapted from Sawka, M. N., Young, A. J., Francesconi, R. P., Muza, S. R., & Pandolf, K. B. (1985). Thermoregulatory and blood responses during exercise at graded hypohydration levels. J Appl Physiol, 59, 1394-1402. -Which of the following homeostatic mechanisms is demonstrated in the graph of blood solutes?

Most fishes can either live in freshwater or live in saltwater habitats, but not in both. If you move a marine fish from the ocean to a lake, it will quickly die, and vice versa. However, a small number of fish species are capable of moving between the two environments. Salmon are osmoregulators that hatch in rivers, spend most of their lives in the ocean, and return to the river where they were born in order to breed. -When a salmon moves from the ocean to a freshwater environment, you would expect its urine volume to ________ and its rate of salt absorption to ________.