Key Concepts Quiz

This activity contains 16 questions.

	Torpor is always associated with _____.   high environmental temperatures and low water supplies reduced metabolic rate and body temperature cold environmental temperatures the production of cellular antifreeze

	The transfer of thermal motion between molecules of objects that are in direct contact is called _____.   conduction convection evaporation radiation

	When a dog picks a sunny and sheltered spot in the yard for a nap on a cool fall day, what mechanism of heating is the dog taking advantage of?   convection radiation evaporation conduction

	How do feathers help thermoregulation by birds?   Feathers are very warm and help retain heat. Feathers return heat to the body by a countercurrent mechanism. Feathers are metabolically active and thus generate metabolic heat. Feathers can trap a layer of insulating air next to the skin.

	Which of the following helps cool animal bodies?   skeletal muscle contraction countercurrent heat exchanger a thick layer of fat evaporation

	Which of the following is one way that land animals tend to lose water to their environment?   evaporation osmosis transpiration active transport

	An aquatic animal that has the same solute concentration as its environment is a(n) _____.   saltwater osmoregulator freshwater osmoregulator osmoconformer amniote

	Which of the following nitrogenous wastes requires the greatest amount of water to excrete?   ammonia uric acid urea protein

	Which of the following is a function of the human kidney?   processing of blood to form filtrate material, from which metabolic wastes are discarded conversion of ammonia to uric acid excretion of urine thermoregulation

	What is a major difference between filtrate in the nephron and urine leaving the bladder?   The filtrate contains amino acids and vitamins, but urine does not. Urine contains amino acids and vitamins, but the filtrate does not. The urine has a greater volume than the filtrate. Filtrate is formed from blood, whereas urine is formed from food and beverage in the digestive tract.

	Which part of the nephron is most directly involved in the filtration of blood?   the loop of Henle the distal tubule the proximal tubule Bowman's capsule

	What is the correct sequence of filtrate processing in the nephron?   secretion, reabsorption, filtration, excretion excretion, secretion, reaborption, and filtration filtration, reabsorption, secretion filtration, reabsorption, secretion, excretion

	What happens to glucose in the filtrate as it passes through the proximal tubule?   Nothing happens to it in the proximal tubule; it passes into the loop of Henle. It is reabsorbed. It is secreted. It is filtered.

	What is the main function of the loop of Henle?   reabsorption excretion active transport of amino acids and glucose secretion of H+ and reabsorption of HCO3-

	The effect of ADH is to _____.   decrease water reabsorption increase solute reabsorption increase water reabsorption decrease solute reabsorption

	In kidney dialysis, what process substitutes for secretion and reabsorption of solutes?   osmosis active transport diffusion excretion

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