Exam 44: Animal Excretory Systems

Studies of cricket Malpighian tubules revealed that potassium ions move against the concentration gradient and accumulate inside the tubule. Which statement best predicts the effect of the potassium concentration gradient on the movement of water in the Malpighian tubules?

The force driving simple diffusion is ________, while an energy source that drives active transport is ________.

Which of the following best explains the death of a marine sea star that had been mistakenly placed in fresh water?

Researchers at a pharmaceutical company are working to develop a new drug that would cause a patient to produce urine that is less concentrated. Which of the following drugs would likely work best to produce this outcome?

Which statement best describes the transfer of fluid from the glomerulus to Bowman's capsule?

Unlike an earthworm's metanephridia, a mammalian nephron ________.

Consuming alcohol results in increased urine excretion due to which of the following?

Excessive formation of uric acid crystals in humans leads to which of the following medical conditions?

Single-celled Paramecium live in pond water (a hyposmotic environment relative to the cytosol). They have a structural feature, a contractile vacuole, that enables them to osmoregulate. If sucrose or sodium chloride was added to the pond water, at which final concentration is the contractile vacuole likely to be most active?