lesson 3 part 1 and 2
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Questions and Answers

True or false: The Hagen-Poiseuille equation predicts the flow rate of blood in capillaries.

False

Diffusion is the net movement of molecules from ______ to low concentration.

high

What is the main factor responsible for dissipating pressure and decreasing flow velocity from arteries to capillaries?

  • Elastic recoiling of arteries
  • Arteriole radii
  • Precapillary sphincters
  • Peripheral resistance (correct)

    • The mammalian cardiovascular system is composed of blood vessels with different ____________ and histology. Answer: diameters

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    True or false: Bulk flow is a slow and limited process for delivering nutrients and eliminating waste from body cells.

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

    What is the primary cause of pressure dissipation and flow velocity decrease from arteries to capillaries?

    <p>Peripheral resistance</p> Signup and view all the answers

    What is the definition of diffusion?

    <p>The movement of molecules from high to low concentration</p> Signup and view all the answers

    Blood pressure in arteries is generated by the contraction of the ___________ ventricle of the heart. Answer: left

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    True or false: The pulmonary circuit has higher pressure and flow rates than the systemic circuit.

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

    What equation explains blood flow in closed circulatory systems?

    <p>Hagen-Poiseuille equation</p> Signup and view all the answers

    What equation explains blood flow in closed circulatory systems?

    <p>Hagen-Poiseuille equation</p> Signup and view all the answers

    Bulk flow is the movement of a fluid from ______ to low pressure.

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

    True or false: The movement of a fluid from high to low pressure is essential for rapid transport of nutrients and oxygen to body cells.

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

    Which type of flow is essential for rapid transport of nutrients and oxygen to body cells?

    <p>Bulk flow</p> Signup and view all the answers

    Peripheral resistance is responsible for the dissipation of pressure and reduction of flow velocity in blood _____________. Answer: capillaries

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    True or false: Platelets are responsible for carrying respiratory gases in the bloodstream.

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

    The motive force for bulk flow in animal circulatory systems is the ______ heart.

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

    What is the motive force for bulk flow in animal circulatory systems?

    <p>The muscular heart</p> Signup and view all the answers

    What is responsible for returning blood to the heart in veins?

    <p>One-way valves</p> Signup and view all the answers

    What is responsible for returning blood to the heart in veins?

    <p>Dual muscle action and one-way valves</p> Signup and view all the answers

    True or false: Small animals require circulatory systems as they rely on direct contact with the external environment to provide the motive force for bulk flow.

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

    What is the name of the cells responsible for generating and transmitting electrical impulses for contraction in the heart?

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

    Which animals do not need circulatory systems?

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

    Precapillary sphincters and smooth muscle cells control blood flow and __________ rates. Answer: flow

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    True or false: Big animals require circulatory systems, with only one type: closed circulatory systems.

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

    True or false: Precapillary sphincters and smooth muscle cells control blood flow in arteries.

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

    Small animals do not need circulatory systems as they rely on direct contact with the ______ environment.

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

    What is the function of plasma in blood?

    <p>To carry nutrients, respiratory gases, hormones, waste products, and important proteins</p> Signup and view all the answers

    True or false: The atrio-ventricular valves are open during ventricular systole.

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

    What is the name of the stage in the cardiac cycle when the atria fill with blood from veins?

    <p>Atrial and ventricular diastole stage</p> Signup and view all the answers

    True or false: Arthropods and most mollusks have closed circulatory systems, while cephalopods, annelids, and vertebrates have open circulatory systems.

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

    Interstitial fluid is recaptured by osmotic pressure and the _____________ system. Answer: lymphatic

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    What are the two types of circulatory systems found in big animals?

    <p>Open and closed circulatory systems</p> Signup and view all the answers

    What is the composition of blood?

    <p>Plasma, leukocytes, platelets, and erythrocytes</p> Signup and view all the answers

    Big animals require circulatory systems, with two types: open and ______ circulatory systems.

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

    What controls the regulation of blood flow and flow rates?

    <p>Precapillary sphincters and arteriole radii</p> Signup and view all the answers

    Which animals have open circulatory systems?

    <p>Arthropods and most mollusks</p> Signup and view all the answers

    True or false: Closed circulatory systems use hemolymph that flows through open-ended vessels and sinuses.

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

    Arthropods and most mollusks have ______ circulatory systems.

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

    What is the name of the stage in the cardiac cycle when the atria contract in unison?

    <p>Atrial systole and ventricular diastole stage</p> Signup and view all the answers

    True or false: The left ventricle of the heart is responsible for generating blood pressure in veins.

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

    The Hagen-Poiseuille equation predicts the flow rate of blood in ___________. Answer: conduits

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    What is the function of the sinoatrial and atrial ventricular nodes?

    <p>To generate and transmit electrical impulses for contraction</p> Signup and view all the answers

    What is the name of the measure that determines the volume of blood pumped per minute by each ventricle?

    <p>Cardiac output</p> Signup and view all the answers

    Closed circulatory systems use blood confined within ______.

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

    True or false: Blood plasma carries only waste products and electrolytes.

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

    True or false: The pressure gradient is generated by the heart in both types of circulatory systems.

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

    What is the main difference between open and closed circulatory systems?

    <p>The presence or absence of vessels</p> Signup and view all the answers

    The mammalian heart is composed of four chambers and _____________. Answer: cardiocytes

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    What generates the pressure gradient in both types of circulatory systems?

    <p>The heart</p> Signup and view all the answers

    True or false: The composition of blood and the cardiac cycle are not important components of the mammalian cardiovascular system.

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

    The cardiac cycle is split into __________ stages. Answer: three

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    What is the name of the liquid extracellular matrix that makes up blood?

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

    What is the cardiac output?

    <p>The volume of blood pumped per minute by each ventricle</p> Signup and view all the answers

    True or false: The cardiac cycle is split into two stages, systole and diastole.

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

    The pressure gradient is generated by the ______ in both types of circulatory systems.

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

    The composition of blood and the ______ cycle are important components of the mammalian cardiovascular system.

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

    True or false: Understanding the limitations of bulk flow and the necessity of diffusion, and the physical laws that govern blood pressure and flow velocity in circulatory systems are not crucial learning outcomes for subsequent lessons.

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

    The pulmonary circuit has lower __________ and flow rates. Answer: pressure

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    True or false: Interstitial fluid is recaptured by the cardiovascular system and the urinary system.

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

    What is the function of the lymphatic system in the cardiovascular system?

    <p>To exchange metabolites in capillary beds through osmotic pressure</p> Signup and view all the answers

    What are important components of the mammalian cardiovascular system?

    <p>The composition of blood and the cardiac cycle</p> Signup and view all the answers

    What are the cellular elements of blood?

    <p>Leukocytes, platelets, and erythrocytes</p> Signup and view all the answers

    True or false: The mammalian heart is composed of two chambers and cardiocytes.

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

    Skeletal muscle tissue and one-way valves in veins help drive blood back to the __________. Answer: heart

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    What is responsible for metabolite exchange in capillary beds?

    <p>Osmotic pressure and lymphatic system</p> Signup and view all the answers

    What is the structure of the mammalian heart?

    <p>Four chambers and cardiac muscle cells called cardiocytes</p> Signup and view all the answers

    What are crucial learning outcomes for subsequent lessons on circulatory systems?

    <p>Understanding the limitations of diffusion and the necessity of bulk flow</p> Signup and view all the answers

    True or false: Diffusion is the net movement of molecules from low to high concentration.

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

    Understanding the limitations of diffusion and the necessity of bulk flow, and the physical laws that govern blood pressure and flow velocity in circulatory systems are crucial learning outcomes for subsequent ______.

    <p>lessons.</p> Signup and view all the answers

    Study Notes

    • Diffusion is the net movement of molecules from high to low concentration, which is slow and limited for delivering nutrients and eliminating waste from body cells.
    • Bulk flow is the movement of a fluid from high to low pressure, which is essential for rapid transport of nutrients and oxygen to body cells.
    • The motive force for bulk flow in animal circulatory systems is the muscular heart, which pumps blood to body cells via a network of interconnected vessels.
    • Small animals do not need circulatory systems as they rely on direct contact with the external environment to provide the motive force for bulk flow.
    • Big animals require circulatory systems, with two types: open and closed circulatory systems.
    • Arthropods and most mollusks have open circulatory systems, while cephalopods, annelids, and vertebrates have closed circulatory systems.
    • Closed circulatory systems use blood confined within vessels, while open circulatory systems use hemolymph that flows through open-ended vessels and sinuses.
    • The pressure gradient is generated by the heart in both types of circulatory systems.
    • The composition of blood and the cardiac cycle are important components of the mammalian cardiovascular system.
    • Understanding the limitations of diffusion and the necessity of bulk flow, and the physical laws that govern blood pressure and flow velocity in circulatory systems are crucial learning outcomes for subsequent lessons.

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    Description

    Test your knowledge of the circulatory system with our quiz! From diffusion to bulk flow, open and closed circulatory systems, and the role of the heart in generating pressure gradients, this quiz covers it all. Brush up on the importance of blood composition and the cardiac cycle while gaining a deeper understanding of the physical laws that govern blood pressure and flow velocity. Challenge yourself with this comprehensive quiz and learn more about the complexity of the mammalian cardiovascular system.

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