Feeding Digestion, and Excretion
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Questions and Answers

What is the major vertebrate innovation related to feeding in fishes?

  • Epibranchial organ
  • Pharyngeal Mill
  • Gill rakers
  • Jaws (correct)
  • Which type of fishes are selective and eat only plants?

  • Omnivores
  • Detritivores
  • Grazers
  • Herbivores (correct)
  • What do detritivores feed on?

  • Other animals
  • Decomposing organic plant matter (correct)
  • Zooplankton
  • Sediments
  • What is the primary food source for omnivores?

    <p>Animal matter</p> Signup and view all the answers

    What do carnivorous fishes primarily eat?

    <p>Other animals</p> Signup and view all the answers

    What is the process of prey capture by suction, ram, and manipulation called?

    <p>Food capture + processing</p> Signup and view all the answers

    Which structure is responsible for grinding food in the pharynx through mechanical, not chemical, digestion?

    <p>Pharyngeal Mill</p> Signup and view all the answers

    What is the function of gill rakers in fish feeding habits?

    <p>Filtering sediments</p> Signup and view all the answers

    What is the primary difference between browsers and grazers in fish feeding habits?

    <p>Selective vs less selective eating</p> Signup and view all the answers

    Which type of fishes feed on decomposing organic plant matter?

    <p>Detritivores</p> Signup and view all the answers

    What is the most common feeding habit among fishes?

    <p>Omnivory</p> Signup and view all the answers

    What is the primary food source for herbivorous fishes?

    <p>Plant matter</p> Signup and view all the answers

    What is the primary function of the gut in fish after the ingestion of food?

    <p>Digestion - breaking down food into small, simple molecules involving the use of acid and enzymes</p> Signup and view all the answers

    Which group of fishes are stomachless (agastric) according to the text?

    <p>Cyprinids (carps)</p> Signup and view all the answers

    What is the main site of excretion for ammonia in fish?

    <p>Gill</p> Signup and view all the answers

    What is the primary nitrogenous waste excretion method for fish that involves direct diffusion and no additional energetic cost?

    <p>Ammoniotelism</p> Signup and view all the answers

    Which type of fishes have a high relative intestinal length (RIL) and are likely to consume detritus and algae?

    <p>Ancistrus (Herbivore)</p> Signup and view all the answers

    What is the primary function of the spiral intestine in fish?

    <p>Increasing absorptive surface area</p> Signup and view all the answers

    Which organ is responsible for the secretion of digestive enzymes in fish?

    <p>Pancreas</p> Signup and view all the answers

    What is the primary function of the stomach in fish?

    <p>Start of digestion and aiding in the breakdown of protein</p> Signup and view all the answers

    Which type of fishes are ureotelic and excrete ammonia detoxified as urea, despite it being energetically costly?

    <p>Elasmobranchs</p> Signup and view all the answers

    What is the primary method of excreting nitrogenous waste for fish that involves ammonia production from protein catabolism?

    <p>Ammoniotelic</p> Signup and view all the answers

    What is the main function of the gut in fish after the ingestion of food?

    <p>Digestion</p> Signup and view all the answers

    Which group of fishes are stomachless (agastric) according to the text?

    <p>Cyprinids (carps)</p> Signup and view all the answers

    What is the primary function of the pyloric caecum in fish digestive physiology?

    <p>Optimizing absorptive surface area</p> Signup and view all the answers

    Which group of fishes are ureotelic and excrete ammonia detoxified as urea, despite it being energetically costly?

    <p>Lake Magadi tilapia</p> Signup and view all the answers

    What is the main site of excretion for ammonia in fish?

    <p>Gill</p> Signup and view all the answers

    What is the primary nitrogenous waste excretion method for fish that involves direct diffusion and no additional energetic cost?

    <p>Ammoniotelism</p> Signup and view all the answers

    What is the primary food source for omnivorous fishes?

    <p>Both plants and animals</p> Signup and view all the answers

    What is the primary method of excreting nitrogenous waste for fish that involves ammonia production from protein catabolism?

    <p>Ammoniotelism</p> Signup and view all the answers

    What is the primary food source for herbivorous fishes?

    <p>Algae</p> Signup and view all the answers

    What is the main function of the spiral intestine in fish?

    <p>Increasing absorptive surface area</p> Signup and view all the answers

    What is the primary difference between browsers and grazers in fish feeding habits?

    <p>Type of food consumed</p> Signup and view all the answers

    Which type of fishes have a high relative intestinal length (RIL) and are likely to consume detritus and algae?

    <p>Herbivores</p> Signup and view all the answers

    What is the major vertebrate innovation related to feeding in fishes?

    <p>Suction feeding</p> Signup and view all the answers

    What is the primary function of the gut in fish after the ingestion of food?

    <p>Digestion</p> Signup and view all the answers

    What is the primary method of prey capture used by fishes?

    <p>Suction</p> Signup and view all the answers

    Which organ is responsible for grinding food in the pharynx through mechanical, not chemical, digestion?

    <p>Pharyngeal mill</p> Signup and view all the answers

    What is the primary nitrogenous waste excretion method for fish that involves direct diffusion and no additional energetic cost?

    <p>Ammoniotelism</p> Signup and view all the answers

    What is the primary food source for detritivorous fishes?

    <p>Decomposing organic plant matter</p> Signup and view all the answers

    What is the primary function of gill rakers in fish feeding habits?

    <p>Filter feeding</p> Signup and view all the answers

    Which type of fishes are selective and eat only plants?

    <p>Browsers</p> Signup and view all the answers

    What is the primary function of the spiral intestine in fish?

    <p>Nutrient absorption</p> Signup and view all the answers

    Which type of fishes have a high relative intestinal length (RIL) and are likely to consume detritus and algae?

    <p>Detritivores</p> Signup and view all the answers

    What is the primary food source for omnivorous fishes?

    <p>Both animal and plant matter</p> Signup and view all the answers

    What is the primary function of the gut in fish after the ingestion of food?

    <p>Nutrient absorption</p> Signup and view all the answers

    What is the major vertebrate innovation related to feeding in fishes?

    <p>Jaws</p> Signup and view all the answers

    What is the primary function of the epibranchial organ in fish feeding habits?

    <p>Filter feeding</p> Signup and view all the answers

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