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lab practical again
24問 • 11ヶ月前
  • ユーザ名非公開
  • 通報

    問題一覧

  • 1

    Which layer of the blood vessel wall directly contacts the blood?

    Tunica Intima

  • 2

    What is the main function of the smooth muscle in the tunica media?

    To control blood vessel contraction and relaxation

  • 3

    Which layer of the blood vessel wall is composed of collagen fibers and anchors the vessel?

    Tunica Externa

  • 4

    What does the elastin in the tunica media do?

    Allows the blood vessel to stretch and recoil

  • 5

    What is the role of the endothelium in the tunica intima?

    To line the lumen and reduce friction

  • 6

    Which of the following statements about arteries is true?

    Arteries have the thickest tunica media to handle high pressure.

  • 7

    Which statement is true about veins compared to arteries?

    C) Veins have thinner walls and larger lumens than arteries.

  • 8

    What is the purpose of elastin in the walls of arteries?

    A) To allow them to stretch and recoil with the heartbeat

  • 9

    What role does the tunica externa play in veins?

    B) To provide protection and anchor the vessel to surrounding structures

  • 10

    What is the main function of elastin in elastic arteries?

    B) To allow the artery to stretch and recoil with the heartbeat

  • 11

    Why do elastic arteries need to expand and recoil?

    B) To maintain continuous blood flow during diastole

  • 12

    Where is elastin found in elastic arteries?

    B) In the tunica media

  • 13

    What happens to the aorta when the heart relaxes?

    B) It recoils to help propel blood onward

  • 14

    In a micrograph of the aorta, how can elastin be identified?

    B) It appears as wavy fibers in the thick tunica media

  • 15

    What is the function of the terminal arteriole?

    B) To bring blood into the capillary bed

  • 16

    What is the purpose of the shunt in the capillary bed?

    B) To connect the terminal arteriole to the post-capillary venule, bypassing the capillaries

  • 17

    Where do exchanges of materials between blood and tissue cells take place?

    C) In the true capillaries

  • 18

    What is the function of the precapillary sphincter?

    C) To regulate the flow of blood into the true capillaries

  • 19

    Which of the following best describes the role of the shunt?

    B) It allows blood to bypass the capillary bed and flow directly to the venule.

  • 20

    What is the primary function of venous valves?

    B) To prevent the backflow of blood in veins

  • 21

    Which feature of veins helps prevent them from bursting due to low pressure?

    B) Thin walls and large lumens

  • 22

    What role does the muscular pump play in venous circulation?

    B) It helps return blood to the heart by pressing veins with contracting skeletal muscles

  • 23

    Where are venous valves most abundant?

    C) In the veins of the limbs

  • 24

    What causes the respiratory pump to pull blood toward the heart?

    B) Decreased pressure in the thoracic cavity during inhalation and increased pressure in the abdominal cavity

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    問題一覧

  • 1

    Which layer of the blood vessel wall directly contacts the blood?

    Tunica Intima

  • 2

    What is the main function of the smooth muscle in the tunica media?

    To control blood vessel contraction and relaxation

  • 3

    Which layer of the blood vessel wall is composed of collagen fibers and anchors the vessel?

    Tunica Externa

  • 4

    What does the elastin in the tunica media do?

    Allows the blood vessel to stretch and recoil

  • 5

    What is the role of the endothelium in the tunica intima?

    To line the lumen and reduce friction

  • 6

    Which of the following statements about arteries is true?

    Arteries have the thickest tunica media to handle high pressure.

  • 7

    Which statement is true about veins compared to arteries?

    C) Veins have thinner walls and larger lumens than arteries.

  • 8

    What is the purpose of elastin in the walls of arteries?

    A) To allow them to stretch and recoil with the heartbeat

  • 9

    What role does the tunica externa play in veins?

    B) To provide protection and anchor the vessel to surrounding structures

  • 10

    What is the main function of elastin in elastic arteries?

    B) To allow the artery to stretch and recoil with the heartbeat

  • 11

    Why do elastic arteries need to expand and recoil?

    B) To maintain continuous blood flow during diastole

  • 12

    Where is elastin found in elastic arteries?

    B) In the tunica media

  • 13

    What happens to the aorta when the heart relaxes?

    B) It recoils to help propel blood onward

  • 14

    In a micrograph of the aorta, how can elastin be identified?

    B) It appears as wavy fibers in the thick tunica media

  • 15

    What is the function of the terminal arteriole?

    B) To bring blood into the capillary bed

  • 16

    What is the purpose of the shunt in the capillary bed?

    B) To connect the terminal arteriole to the post-capillary venule, bypassing the capillaries

  • 17

    Where do exchanges of materials between blood and tissue cells take place?

    C) In the true capillaries

  • 18

    What is the function of the precapillary sphincter?

    C) To regulate the flow of blood into the true capillaries

  • 19

    Which of the following best describes the role of the shunt?

    B) It allows blood to bypass the capillary bed and flow directly to the venule.

  • 20

    What is the primary function of venous valves?

    B) To prevent the backflow of blood in veins

  • 21

    Which feature of veins helps prevent them from bursting due to low pressure?

    B) Thin walls and large lumens

  • 22

    What role does the muscular pump play in venous circulation?

    B) It helps return blood to the heart by pressing veins with contracting skeletal muscles

  • 23

    Where are venous valves most abundant?

    C) In the veins of the limbs

  • 24

    What causes the respiratory pump to pull blood toward the heart?

    B) Decreased pressure in the thoracic cavity during inhalation and increased pressure in the abdominal cavity