Exam 42: Regulation of the Internal Environment: Water, Solutes, and Temperature

Suppose that you examine an animal and find it has excretory structures that have a closed proximal end immersed in hemolymph and a distal end that empties into the gut. Which term should you use to describe these structures?

Which term refers to the selective movement of specific small molecules and ions into excretory system tubules?

What are aquaporins?

Match each description to a nephron tubule portion. Nephron tubule portions can be used more than once. -may start in the medulla and end in the cortex

In mammals, about 65% of the water from the filtrate gets reabsorbed. In which segment of the excretory tubule does this occur?

In mammals, where is the glomerulus located?

Which term refers to the state in which the body temperature increases a few degrees above normal for a prolonged period?

Which term refers to an extended period of torpor that an animal enters during the winter when the environment is too cold and food is too scarce?

In mammals, essentially all of the glucose and amino acids from the filtrate get reabsorbed in one of the excretory tubule segments. In which segment does this occur?

In mammals, which excretory tubule segment allows water to exit but does NOT allow ions or urea to exit?

Which process involves the flow of heat between two matters that are in direct contact?

Which of the following are typically osmoconformers?

In mammals, which reaction to cold, limits the amount of heat an animal loses to its surroundings?

Which salt concentration is found in the body fluids of Atlantic salmon?

What is the tonicity of the urine of marine mammals compared with another fluid?