50 Questions
Which of the following is NOT a function of the circulatory system?
Energy production
Which component of the circulatory system is responsible for pumping blood?
Heart
Which of the following is true about red blood cells (RBCs)?
RBC size generally decreases with activity level
What does Hct stand for in relation to blood cell production?
Mean cell hematocrit concentration
Which of the following is NOT an effector of blood cell production?
Pollutants
Which organ is responsible for blood cell production in lampreys?
Fatty tissue above nerve chord
What does MCHC stand for in relation to blood cell production?
Mean cell hematocrit concentration
Which of the following factors can influence circulation in fish?
All of the above
What is the significance of Bohr and Root shifts in relation to blood circulation?
They decrease oxygen delivery to tissues
Which of the following is NOT a function of the circulatory system in fish?
Damage/repair
Which of the following is true about haemoglobin in Antarctic Ice Fishes?
It has no haemoglobin.
What is the main function of haemoglobin in Bony Fishes?
To increase blood O2 carrying capacity.
Which fish has monomeric haemoglobin similar to myoglobin when oxygenated?
Trematomus bernacchii
What is the molecular weight of tetrameric haemoglobin in Bony Fishes?
~65 kDa
Which of the following is true about haemoglobin polymorphisms in trout?
Trout has 4 types of haemoglobin.
What is the Bohr Effect?
Decreased Hb-O2 Affinity due to increased PCO2 or decreased pH.
What is the Root Effect?
Decreased Hb-O2 carrying capacity due to increased PCO2 or decreased pH.
What is the main factor affecting Hb-O2 Affinity in the presence of organic phosphates?
Conformational change in Hb.
What is the effect of greater temperature on Hb-O2 Affinity?
Greater temperature decreases Hb-O2 Affinity.
Which fish has two hemoglobin polymorphisms that are temperature insensitive?
Gadus morhua
Which of the following is NOT a factor affecting Hb-O2 Affinity?
Root Effect
Which fish has the greatest Hb-CO2 affinity when Hb is oxygenated?
Trout
Which fish has the highest oxygen affinity Val55-Ala62 haplotype?
Atlantic cod populations in Arctic waters
Which of the following is true about haemoglobin in Antarctic Ice Fishes?
It has a low metabolic rate
Which fish has the lowest Hb-O2 affinity at warmer temperatures?
Tench
Which of the following is NOT a subunit of tetrameric haemoglobin in Bony Fishes?
γ-chains
Which fish has adaptations of a large heart and low resistance circulatory system?
Crocodile Ice Fish
Which of the following factors affects Hb-O2 Affinity by decreasing it?
Bohr Effect
Which fish has two hemoglobin polymorphisms that are temperature insensitive?
Trout
Which of the following is true about the Haldane Effect?
It is the ability of Hb to carry CO2
Which of the following is NOT a function of the circulatory system in fish?
Muscle Contraction
What is the main function of haemoglobin in Bony Fishes?
Oxygen Delivery
Which component of the circulatory system is responsible for pumping blood?
Heart
What does Hct stand for in relation to blood cell production?
Hematocrit
What is the significance of Bohr and Root shifts in relation to blood circulation?
They influence oxygen release from hemoglobin
Which of the following factors can influence circulation in fish?
All of the above
Which organ is responsible for blood cell production in lampreys?
Epigonal Organ
Which of the following is true about red blood cells (RBCs)?
Their volume reflects oxygen demands
What is the Root Effect?
A decrease in hemoglobin concentration
What is the main factor affecting Hb-O2 Affinity in the presence of organic phosphates?
Carbon Dioxide
True or false: Haemoglobin is a metalloprotein that binds and carries oxygen in the blood?
True
True or false: Haemoglobin in Antarctic Ice Fishes has a high affinity for oxygen?
False
True or false: Bony Fishes have tetrameric haemoglobin with four subunits?
True
True or false: The Bohr Effect decreases the affinity of haemoglobin for oxygen?
True
True or false: Organic phosphates can decrease the affinity of haemoglobin for oxygen?
True
True or false: The main function of haemoglobin in Bony Fishes is oxygen delivery?
True
True or false: Lampreys have bone marrow as their haemopoietic tissue?
False
True or false: Hct stands for hematocrit concentration?
False
True or false: The Root Effect is the decrease in Hb-O2 Affinity caused by organic phosphates?
False
True or false: The Haldane Effect refers to the increased binding of CO2 to Hb in the presence of low O2 levels?
True
Test your knowledge on blood and circulation topics such as hemoglobins, hearts, and factors influencing circulation. Explore the significance of Bohr and Root shifts, the Haldane Effect, and the loading and unloading of hearts. Understand the structure, function, and evolution of the circulatory system, as well as cardiac performance and autonomic control.
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