ch2 -2
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Questions and Answers

What is required for the food processing by the digestive system and transport to body tissues?

  • Nitrogen
  • Hydrogen
  • Oxygen (correct)
  • Carbon dioxide

Which system is closely intertwined with the digestive system for energy acquisition and metabolism support?

  • Respiratory and circulatory systems (correct)
  • Excretory system
  • Skeletal system
  • Nervous system

What process is part of feeding according to the text?

  • Photosynthesis
  • Excretion
  • Respiration
  • Swallowing (correct)

Which animals are mentioned as still filtering small particles of food from the water?

<p>Amphioxus and larval lampreys (C)</p> Signup and view all the answers

What distinguishes most vertebrates in terms of feeding habits?

<p>They are particulate feeders (A)</p> Signup and view all the answers

What is the ancestral condition for the cranium of vertebrates?

<p>Chondrocranium formed from paired sensory capsules (D)</p> Signup and view all the answers

What happens to the dermatocranium in chondrichthyans?

<p>It is lost (D)</p> Signup and view all the answers

What do the pharyngeal arches of the mandibular and hyoid segments become in gnathostomes?

<p>Modify to form jaws and jaw supports (A)</p> Signup and view all the answers

What characterizes the lamprey's splanchnocranium?

<p>Contains six gill openings with specialized structures (A)</p> Signup and view all the answers

What additional structure is seen in osteichthyans as part of their cranium?

<p>Bony operculum covering the gills (B)</p> Signup and view all the answers

What happens to the paired anterior trabeculae in jawed vertebrates?

<p>They transform into jaw supports in gnathostomes (C)</p> Signup and view all the answers

What is the shared exit for the urinary, reproductive, and digestive systems in all vertebrates except therian mammals?

<p>Cloaca (A)</p> Signup and view all the answers

Which type of respiration is seen in amphioxus, where oxygen absorption and carbon dioxide loss occur through a thin skin?

<p>Cutaneous respiration (A)</p> Signup and view all the answers

What hormones does the pancreas secrete that are involved in the regulation of glucose metabolism and blood-sugar levels?

<p>Insulin and glucagon (A)</p> Signup and view all the answers

In the primitive vertebrate condition, which of the following structures is NOT present?

<p>Stomach (A)</p> Signup and view all the answers

In lampreys, what is the equivalent of the chondrocranium and splanchnocranium in a living cartilaginous vertebrate like a shark?

<p>Horizontal septum (D)</p> Signup and view all the answers

Which vertebrate group has a shared exit for the urinary, reproductive, and digestive systems similar to the cloaca?

<p>Amphibians (D)</p> Signup and view all the answers

What are the excretory cells in amphioxus called?

<p>Solenocytes (C)</p> Signup and view all the answers

Where do solenocytes empty their effluent in amphioxus?

<p>Into the atrium (D)</p> Signup and view all the answers

What is the function of the archinephric duct in vertebrates?

<p>Drain urine from the kidney to the cloaca (D)</p> Signup and view all the answers

Which structure replaces the posterior cardinal veins in lungfishes and tetrapods?

<p>Posterior vena cava (B)</p> Signup and view all the answers

Where are the gonads derived from?

<p>Mesoderm (D)</p> Signup and view all the answers

What is the primary function of reproduction?

<p>Producing and releasing gametes (A)</p> Signup and view all the answers

What is the embryonic structure that forms the nephric ridge, giving rise to the excretory and reproductive systems?

<p>Nephrotome (A)</p> Signup and view all the answers

In vertebrates, which portion of the kidney is functional only in embryos and possibly in adult hagfishes?

<p>Pronephros (B)</p> Signup and view all the answers

Besides nitrogenous waste disposal, what other functions do kidneys regulate in vertebrates?

<p>Regulate water and minerals (A)</p> Signup and view all the answers

What is the segmental structure extending the entire length of the dorsal body wall in fishes that assists in waste disposal?

<p>Mesonephros (A)</p> Signup and view all the answers

Which system in tetrapods is primarily responsible for waste disposal, water regulation, and mineral balance functions?

<p>Excretory System (C)</p> Signup and view all the answers

What unsegmented structures are responsible for gamete production in vertebrates?

<p>Gonads (C)</p> Signup and view all the answers

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