Fish Cardiovascular System
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Questions and Answers

Which of the following is NOT a function of the circulatory system?

  • Energy production (correct)
  • Oxygen delivery
  • Nutrient uptake and delivery
  • Waste removal

    • Which component of the circulatory system is responsible for pumping blood?

  • Blood vessels
  • Heart (correct)
  • Blood
  • Lungs

    • Which of the following is true about red blood cells (RBCs)?

  • RBC size generally increases with activity level
  • RBCs are only found in elasmobranchs
  • RBC size generally decreases with activity level (correct)
  • RBCs are nucleated in all fish species

    • What does Hct stand for in relation to blood cell production?

    <p>Mean cell hematocrit concentration</p> Signup and view all the answers

    Which of the following is NOT an effector of blood cell production?

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

    Which organ is responsible for blood cell production in lampreys?

    <p>Fatty tissue above nerve chord</p> Signup and view all the answers

    What does MCHC stand for in relation to blood cell production?

    <p>Mean cell hematocrit concentration</p> Signup and view all the answers

    Which of the following factors can influence circulation in fish?

    <p>All of the above</p> Signup and view all the answers

    What is the significance of Bohr and Root shifts in relation to blood circulation?

    <p>They decrease oxygen delivery to tissues</p> Signup and view all the answers

    Which of the following is NOT a function of the circulatory system in fish?

    <p>Damage/repair</p> Signup and view all the answers

    Which of the following is true about haemoglobin in Antarctic Ice Fishes?

    <p>It has no haemoglobin.</p> Signup and view all the answers

    What is the main function of haemoglobin in Bony Fishes?

    <p>To increase blood O2 carrying capacity.</p> Signup and view all the answers

    Which fish has monomeric haemoglobin similar to myoglobin when oxygenated?

    <p>Trematomus bernacchii</p> Signup and view all the answers

    What is the molecular weight of tetrameric haemoglobin in Bony Fishes?

    <p>~65 kDa</p> Signup and view all the answers

    Which of the following is true about haemoglobin polymorphisms in trout?

    <p>Trout has 4 types of haemoglobin.</p> Signup and view all the answers

    What is the Bohr Effect?

    <p>Decreased Hb-O2 Affinity due to increased PCO2 or decreased pH.</p> Signup and view all the answers

    What is the Root Effect?

    <p>Decreased Hb-O2 carrying capacity due to increased PCO2 or decreased pH.</p> Signup and view all the answers

    What is the main factor affecting Hb-O2 Affinity in the presence of organic phosphates?

    <p>Conformational change in Hb.</p> Signup and view all the answers

    What is the effect of greater temperature on Hb-O2 Affinity?

    <p>Greater temperature decreases Hb-O2 Affinity.</p> Signup and view all the answers

    Which fish has two hemoglobin polymorphisms that are temperature insensitive?

    <p>Gadus morhua</p> Signup and view all the answers

    Which of the following is NOT a factor affecting Hb-O2 Affinity?

    <p>Root Effect</p> Signup and view all the answers

    Which fish has the greatest Hb-CO2 affinity when Hb is oxygenated?

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

    Which fish has the highest oxygen affinity Val55-Ala62 haplotype?

    <p>Atlantic cod populations in Arctic waters</p> Signup and view all the answers

    Which of the following is true about haemoglobin in Antarctic Ice Fishes?

    <p>It has a low metabolic rate</p> Signup and view all the answers

    Which fish has the lowest Hb-O2 affinity at warmer temperatures?

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

    Which of the following is NOT a subunit of tetrameric haemoglobin in Bony Fishes?

    <p>γ-chains</p> Signup and view all the answers

    Which fish has adaptations of a large heart and low resistance circulatory system?

    <p>Crocodile Ice Fish</p> Signup and view all the answers

    Which of the following factors affects Hb-O2 Affinity by decreasing it?

    <p>Bohr Effect</p> Signup and view all the answers

    Which fish has two hemoglobin polymorphisms that are temperature insensitive?

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

    Which of the following is true about the Haldane Effect?

    <p>It is the ability of Hb to carry CO2</p> Signup and view all the answers

    Which of the following is NOT a function of the circulatory system in fish?

    <p>Muscle Contraction</p> Signup and view all the answers

    What is the main function of haemoglobin in Bony Fishes?

    <p>Oxygen Delivery</p> Signup and view all the answers

    Which component of the circulatory system is responsible for pumping blood?

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

    What does Hct stand for in relation to blood cell production?

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

    What is the significance of Bohr and Root shifts in relation to blood circulation?

    <p>They influence oxygen release from hemoglobin</p> Signup and view all the answers

    Which of the following factors can influence circulation in fish?

    <p>All of the above</p> Signup and view all the answers

    Which organ is responsible for blood cell production in lampreys?

    <p>Epigonal Organ</p> Signup and view all the answers

    Which of the following is true about red blood cells (RBCs)?

    <p>Their volume reflects oxygen demands</p> Signup and view all the answers

    What is the Root Effect?

    <p>A decrease in hemoglobin concentration</p> Signup and view all the answers

    What is the main factor affecting Hb-O2 Affinity in the presence of organic phosphates?

    <p>Carbon Dioxide</p> Signup and view all the answers

    True or false: Haemoglobin is a metalloprotein that binds and carries oxygen in the blood?

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

    True or false: Haemoglobin in Antarctic Ice Fishes has a high affinity for oxygen?

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

    True or false: Bony Fishes have tetrameric haemoglobin with four subunits?

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

    True or false: The Bohr Effect decreases the affinity of haemoglobin for oxygen?

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

    True or false: Organic phosphates can decrease the affinity of haemoglobin for oxygen?

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

    True or false: The main function of haemoglobin in Bony Fishes is oxygen delivery?

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

    True or false: Lampreys have bone marrow as their haemopoietic tissue?

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

    True or false: Hct stands for hematocrit concentration?

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

    True or false: The Root Effect is the decrease in Hb-O2 Affinity caused by organic phosphates?

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

    True or false: The Haldane Effect refers to the increased binding of CO2 to Hb in the presence of low O2 levels?

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

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