Key Concepts Quiz
This activity contains 16 questions.
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 _____.
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?
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
Which of the following is one way that land animals tend to lose water to their environment?
An aquatic animal that has the same solute concentration as its environment is a(n) _____.
Which of the following nitrogenous wastes requires the greatest amount of water to excrete?
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
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
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?
active transport of amino acids and glucose
secretion of H
and reabsorption of HCO
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?
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