CAMPBELL BIOLOGY,VOL.II >CUSTOM<
17th Edition
ISBN: 9781323803677
Author: Urry
Publisher: PEARSON
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Chapter 41, Problem 9TYU
EVOLUTION CONNECTION Lizards and snakes cannot breathe while chewing food because the connection between their external nostrils and their esophagus is in the mouth. In contrast, mammals can continue breathing through the nostrils while chewing food in the mouth. However, choking sometimes occurs when the paths of air and food cross each other. Thinking about the high oxygen demand of active endotherms, explain how the concept of descent with modification explains this "imperfect" anatomy of some amniotes (see Figure 34.2 to review vertebrate phylogeny).
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Which statement is false?
Chimpanzees have their vocal cords situated higher in the pharynx
than in humans.
All mammal species can choke (obstruction of windpipe) on food.
The fact that we can choke on our food is an evolutionary
compromise that is largely compensated that we have the capacity
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Choking is partly a consequence of the fact that there is a space
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A..
I.
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Which statement is false?
Chimpanzees have their vocal cords situated higher in the pharynx
than in humans.
All mammal species can choke (obstruction of windpipe) on food.
The fact that we can choke on our food is an evolutionary
compromise that is largely compensated that we have the capacity
to speak.
Choking is partly a consequence of the fact that there is a space
between the posterior end of the soft palate and the dorsal tip of the
epiglottis.
Salmonella, a gram-negative bacterium, produces an endotoxin that causes food poisoning. What is endotoxin?
Secretion of the bacterium that becomes toxic only when it
enters the cells of the digestive tract.
A toxin accumulated in the wall of the bacteria in his life and
that is released into the host when the bacteria dies.
A toxic substance produced by living bacteria and secreted
directly on the host cells (in the intestine).
None of these answers defines an endotoxin.
Evolution Connection Lizards and snakes cannotbreathe while chewing food because the connection betweentheir external nostrils and their esophagus is in the mouth.In contrast, mammals can continue breathing throughthe nostrils while chewing food in the mouth. However,choking sometimes occurs when the paths of air and foodcross each other. Thinking about the high oxygen demandof active endotherms, explain how the concept of descentwith modification explains this “imperfect” anatomy of someamniotes (see Figure 34.2 to review vertebrate phylogeny).
Chapter 41 Solutions
CAMPBELL BIOLOGY,VOL.II >CUSTOM<
Ch. 41.1 - An animal requires 20 amino acids to make...Ch. 41.1 - Prob. 2CCCh. 41.1 - WHAT IF? If a zoo animal eating ample food shows...Ch. 41.2 - Prob. 1CCCh. 41.2 - In what sense are nutrients from a recently...Ch. 41.2 - Prob. 3CCCh. 41.3 - Explain why a proton pump inhibitor, such as the...Ch. 41.3 - Thinking about our nutritional needs and feeding...Ch. 41.3 - Prob. 3CCCh. 41.4 - Prob. 1CC
Ch. 41.4 - What features of a mammal's digestive system make...Ch. 41.4 - WHAT IF? "Lactose-intolerant" people have a...Ch. 41.5 - Explain how people can become obese even if their...Ch. 41.5 - WHAT IF? Suppose you were studying two groups of...Ch. 41.5 - Prob. 3CCCh. 41 - Prob. 41.1CRCh. 41 - Propose an artificial diet that would eliminate...Ch. 41 - Prob. 41.3CRCh. 41 - How does human anatomy indicate that our primate...Ch. 41 - Prob. 41.5CRCh. 41 - Fat digestion yields fatty acids and glycerol....Ch. 41 - The mammalian trachea and esophagus both connect...Ch. 41 - Which of the following organs is incorrectly...Ch. 41 - Prob. 4TYUCh. 41 - Prob. 5TYUCh. 41 - After surgical removal of the gallbladder, a...Ch. 41 - If you were to jog 1 km a few hours after lunch,...Ch. 41 - DRAW IT Create a flowchart to summarize the events...Ch. 41 - EVOLUTION CONNECTION Lizards and snakes cannot...Ch. 41 - SCIENTIFIC INQUIRY In human populations of...Ch. 41 - WRITE ABOUT A THEME: ORGANIZATION Hair is largely...Ch. 41 - SYNTHESIZE YOUR KNOWLEDGE Hummingbirds are well...
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