Erythrocytes: Biconcave Structure and Functions
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Questions and Answers

What is the meaning of 'bi' in the term 'biconcave'?

  • Convex
  • Curved
  • Two (correct)
  • Half

    • What is the advantage of erythrocytes being flexible?

  • Enhanced oxygen carrying capacity
  • Improved production in the bone marrow
  • Increased surface area for gas exchange
  • Ability to pass through capillaries (correct)

    • What is the shape of an erythrocyte that increases its surface area for gas exchange?

  • Biconcave (correct)
  • Elliptical
  • Cubical
  • Spherical

    • Which group of animals has nucleated erythrocytes?

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

    What is the characteristic of erythrocytes that distinguishes them from other cells?

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

    Erythrocytes have a nucleus in all vertebrates.

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

    The biconcave shape of erythrocytes reduces their surface area for gas exchange.

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

    Erythrocytes are rigid and inflexible.

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

    The curvature of erythrocytes is outwards.

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

    The shape of erythrocytes has no effect on their ability to exchange gases.

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

    Erythrocytes are ______ apart from those in birds, reptiles, amphibians, and fish.

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

    The shape of erythrocytes is described as ______ concave.

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

    Erythrocytes are ______ to pass through capillaries.

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

    The ______ shape of erythrocytes increases their surface area for gas exchange.

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

    The ______ of erythrocytes curves inwards.

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

    Match the characteristics of erythrocytes with their corresponding advantages:

    <p>Biconcave shape = Increased surface area for gas exchange Flexible = Easy passage through capillaries Anucleate = Lighter in weight Curves inwards = Increased volume for carrying oxygen</p> Signup and view all the answers

    Match the features of erythrocytes with their descriptive terms:

    <p>Two curves inwards = Biconcave Lacking a nucleus = Anucleate Ability to change shape = Flexible Increased surface area = Concave</p> Signup and view all the answers

    Match the characteristics of erythrocytes with the exceptions:

    <p>Have a nucleus = Birds, reptiles, amphibians, and fish Are flexible = Mammals Have a biconcave shape = All vertebrates Are found in the blood = All living organisms</p> Signup and view all the answers

    Match the characteristics of erythrocytes with their functions:

    <p>Surface area = Gas exchange Flexibility = Passing through capillaries Shape = Carrying oxygen Lack of nucleus = Reducing metabolic activities</p> Signup and view all the answers

    Match the terms with their corresponding meanings in the context of erythrocytes:

    <p>Bi = Two Concave = Curves outwards Anucleate = Lacking a nucleus Flexible = Unchangeable shape</p> Signup and view all the answers

    Match the following characteristics of RBCs with their descriptions:

    <p>Circular = Shape of RBCs in some species Oval = Shape of RBCs in some species Heterogenous = RBCs with different shapes Homogenous = RBCs with uniform shape</p> Signup and view all the answers

    Match the following characteristics of RBCs with their effects on RBCs' functionality:

    <p>Central pallor = Increases surface area for gas exchange Biconcave shape = Increases surface area for gas exchange Heterogenous shape = Reduces surface area for gas exchange Homogenous shape = No effect on surface area for gas exchange</p> Signup and view all the answers

    Match the following characteristics of RBCs with their species-specific examples:

    <p>Circular = Mammals Oval = Birds Heterogenous = Reptiles Homogenous = Fish</p> Signup and view all the answers

    Match the following RBC characteristics with their effects on RBC flexibility:

    <p>Biconcave shape = Increases flexibility Circular shape = Decreases flexibility Heterogenous shape = No effect on flexibility Homogenous shape = Increases flexibility</p> Signup and view all the answers

    Match the following characteristics of RBCs with their relevance to gas exchange:

    <p>Central pallor = Increases surface area for gas exchange Biconcave shape = Increases surface area for gas exchange Heterogenous shape = No effect on gas exchange Homogenous shape = Decreases surface area for gas exchange</p> Signup and view all the answers

    What is the primary function of erythrocytes in the body?

    <p>To carry oxygen to the tissues (A)</p> Signup and view all the answers

    Where are erythrocytes produced in the body?

    <p>In the bone marrow (D)</p> Signup and view all the answers

    What is the average lifespan of erythrocytes?

    <p>110 days (B)</p> Signup and view all the answers

    What is the purpose of the hormone erythropoietin?

    <p>To stimulate the production of erythrocytes (A)</p> Signup and view all the answers

    Where do erythrocytes typically get broken down?

    <p>In the spleen and liver (C)</p> Signup and view all the answers

    Erythrocytes can leave the cardiovascular system without any damage to blood vessels.

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

    The spleen is responsible for producing RBCs in the body.

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

    Erythrocytes have a heterogeneous shape.

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

    Erythrocytes can live up to 200 days on average.

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

    Erythrocytes carry O2 to the tissues using a protein other than haemoglobin.

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

    Erythropoietin is a hormone produced by the ______

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

    The major sites for the breakdown of RBC are the spleen and ______

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

    The average lifespan of RBC is approximately ______ days

    <p>110</p> Signup and view all the answers

    RBC function to carry O2 to the tissues utilizing ______ for this

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

    RBC will never leave the cardiovascular system unless a blood vessel is ______

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

    Match the following organs with their roles in the lifecycle of RBCs:

    <p>Bone marrow = Production of RBCs Spleen = Breakdown of RBCs Liver = Breakdown of RBCs Kidneys = Production of erythropoietin</p> Signup and view all the answers

    Match the following characteristics of RBCs with their relevance to RBC shape:

    <p>Biconcave = Increases surface area for gas exchange Central pallor = Aids in O2 transportation Oval = Found in certain species of RBCs Heterogeneous = Found in certain species of RBCs</p> Signup and view all the answers

    Match the following with their functions in the body:

    <p>Erythropoietin = Stimulates RBC production Haemoglobin = Carries O2 to the tissues RBCs = Carries O2 to the tissues Spleen = Filters the blood</p> Signup and view all the answers

    Match the following with their effects on RBCs' movement:

    <p>Flexibility = Allows RBCs to pass through capillaries Rigidity = Prevents RBCs from passing through capillaries Biconcave shape = Aids in O2 transportation Damaged blood vessels = Allows RBCs to leave the cardiovascular system</p> Signup and view all the answers

    Match the following with their locations in the body:

    <p>RBC production = Bone marrow RBC breakdown = Spleen and liver Erythropoietin production = Kidneys RBC function = Tissues</p> Signup and view all the answers

    What is the function of the iron atom in each molecule of haemoglobin?

    <p>To bind one oxygen molecule (C)</p> Signup and view all the answers

    Why does iron deficiency lead to feelings of tiredness?

    <p>Because iron is necessary for the transportation of oxygen in the blood (B)</p> Signup and view all the answers

    What is the difference between oxyhaemoglobin and deoxyhaemoglobin?

    <p>Oxyhaemoglobin is red, while deoxyhaemoglobin is purplish-blue (A)</p> Signup and view all the answers

    What is the advantage of having haemoglobin in red blood cells?

    <p>It allows red blood cells to carry more oxygen than if it were dissolved in plasma (C)</p> Signup and view all the answers

    How many molecules of oxygen can each molecule of haemoglobin bind?

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

    What is the primary function of haemoglobin in erythrocytes?

    <p>Carry oxygen to tissues (C)</p> Signup and view all the answers

    How many oxygen molecules can each molecule of haemoglobin bind?

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

    What color does deoxygenated haemoglobin appear as?

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

    Why do people feel tired when they are iron deficient?

    <p>Red blood cells carry less oxygen (B)</p> Signup and view all the answers

    What is the advantage of having haemoglobin in red blood cells for oxygen transportation?

    <p>Allows for efficient O2 binding and transport (A)</p> Signup and view all the answers

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