Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Bio - ch 41 & 42

Jon - Bio 181

QuestionAnswer
2) An animal that migrates great distances would obtain the greatest benefit from storing its energy as fats
3) Which one of the following statements about obesity is false? if a person's excess calories were stored as carbs instead of fat, that person would weigh less
4) Some nutrients are considered "essential" in the diets of certain animals because they cannot be manufactured by the organism.
5) Which of the following is not one of the four classes of essential nutrients? essential sugars
6) Animals require certain basic amino acids in their diet. An amino acid that is referred to as nonessential would be best described as one that can be made by the animal's body from other substances.
12) During the process of digestion, fats are broken down when fatty acids are detached from glycerol. In addition, proteins are digested to yield amino acids. What do these two processes have in common? Both involve the addition of a water molecule to break bonds (hydrolysis).
14) To leave the digestive tract, a substance must cross a cell membrane. During which stage of food processing does this take place? absorption
17) Increasing the surface area facilitates which of the following digestive processes? hydrolysis, absorption
19) Which of the following do not need a digestive system? autotrophs
21) What is peristalsis? smooth muscle contractions that move food through the alimentary canal
22) After ingestion, the first type of macromolecule to be worked on by enzymes in the human digestive system is carbohydrate.
25) What part(s) of the digestive system have secretions with a pH of 2? stomach
26) Which of the following statements about pepsin is true? begins the hydrolysis of proteins in the stomach.
29) Most nutrients are absorbed across the epithelium of the small intestine.
31) Which of the following statement(s) about bile salts is (are) true? emulsify fats in the duodenum.
43) In humans, about 7 liters of fluid are secreted each day into the intestinal tract. Which of the following does not secrete fluid? large intestine
45) Which portion of the digestive tract is most like a hallway in a school building, connecting one classroom to another? esophagus
54) Gas exchange is more difficult for aquatic animals with gills than for terrestrial animals with lungs because water contains much less O2 than air per unit volume.
55) Countercurrent exchange is evident in the flow of water across the gills of a fish and that of blood within those gills.
62) Air rushes into the lungs of humans during inhalation because the rib muscles and diaphragm contract, increasing the lung volume.
64) As a person goes from rest to full-effort exercise, there is an increase in the tidal volume.
66) During most daily activities, the human respiration rate is most closely linked to the blood levels of carbon dioxide.
67) Breathing is usually regulated by CO2 and O2 concentration and pH-level sensors.
73) An "internal reservoir" of oxygen in rested muscle is found in oxygen molecules bound to myoglobin.
74) Hemoglobin and hemocyanin both transport oxygen.
86) When you hold your breath, which of the following blood gas changes first leads to the urge to breathe? rising CO2
46) Which of the following would probably contribute to constipation? A substance that promotes water reabsorption in the large intestine.
47) In general, herbivorous mammals have molars modified for grinding.
48) In which group of animals would you expect to find a relatively long cecum? herbivores
49) All of the following are adaptations to an herbivorous diet except bile salts.
50) Why are cattle able to survive on a diet consisting almost entirely of plant material? They have cellulose-digesting, symbiotic microorganisms in chambers of their stomachs.
61) Which of the following organs is incorrectly paired with its function? large intestine—bile production
65) The symbiotic microbes that help nourish a ruminant live mainly in specialized regions of the stomach.
Created by: jonnymac07
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards