L23 Microcirculation and lymphatic system
40 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main function of capillaries in the circulation system?

  • Exchange fluid, nutrients, and hormones between blood and interstitial fluid (correct)
  • Control blood flow using muscular walls
  • Collect blood from venules
  • Transport blood under high pressure

Which term refers to the alteration in the diameter of blood vessels to regulate blood flow?

  • Vasomotion (correct)
  • Venous reserve
  • Vasodilation
  • Vasoconstriction

What do arterioles primarily control in the circulation system?

  • Blood vessel diameter (correct)
  • Capillary exchange
  • High-pressure blood flow
  • Fluid and electrolyte balance

What is the major function of venules in the circulation system?

<p>Serve as a reservoir for extra blood (C)</p> Signup and view all the answers

Which part of the circulation system features strong vascular walls to transport blood under high pressure?

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

What is the primary role of veins in the circulation system?

<p>Transport blood under low pressure (A)</p> Signup and view all the answers

'Oedema' in the context of the circulatory system is primarily caused by:

<p>'Starling' forces (D)</p> Signup and view all the answers

'Vasodilation' and 'Vasoconstriction' are primarily regulated by:

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

Which of the following is a cause of decreased colloid osmotic pressure leading to extracellular edema?

<p>Lack of protein intake (Kwashiorkor) (D)</p> Signup and view all the answers

What is the primary cause of edema in a patient with heart failure?

<p>Increased capillary hydrostatic pressure (D)</p> Signup and view all the answers

Which of the following causes of extracellular edema is associated with non-pitting edema?

<p>Inadequate lymph drainage (A)</p> Signup and view all the answers

What is the primary cause of edema in a patient with kidney disease?

<p>Excessive salt retention (C)</p> Signup and view all the answers

Which of the following is not a cause of decreased colloid osmotic pressure leading to extracellular edema?

<p>Increased capillary permeability (B)</p> Signup and view all the answers

Which of the following is a cause of increased capillary permeability leading to extracellular edema?

<p>Vitamin C deficiency (C)</p> Signup and view all the answers

What is the primary cause of edema in a patient with liver disease?

<p>Decreased colloid osmotic pressure (B)</p> Signup and view all the answers

Which of the following components of the Starling equation is altered in a patient with kwashiorkor?

<p>Tissue colloid osmotic pressure (C)</p> Signup and view all the answers

What percentage of the blood volume is in the systemic circulation?

<p>84% (B)</p> Signup and view all the answers

What is the diameter range of capillaries?

<p>5μm - 9μm (B)</p> Signup and view all the answers

What is the velocity of blood flow in capillaries?

<p>0.2-0.3 mm/sec (A)</p> Signup and view all the answers

What type of capillaries are found in the muscle and brain?

<p>Continuous capillaries (C)</p> Signup and view all the answers

What causes vasomotion in capillaries?

<p>Intermittent contraction of metarterioles and precapillary sphincters (B)</p> Signup and view all the answers

What is the surface area of capillaries in an adult body?

<p>3000 m² (C)</p> Signup and view all the answers

What is the thickness of capillary walls?

<p>0.5-1 μm (A)</p> Signup and view all the answers

What is the length of capillaries?

<p>0.7 mm (A)</p> Signup and view all the answers

What is the primary function of the lymphatic system?

<p>To return excess tissue fluid to the bloodstream (A)</p> Signup and view all the answers

Which of the following statements about lymph fluid is correct?

<p>It is isotonic and contains fewer proteins than plasma (A)</p> Signup and view all the answers

Which of the following factors does NOT contribute to the flow of lymph?

<p>Positive intrathoracic pressure (D)</p> Signup and view all the answers

What is the primary function of lymph nodes?

<p>To remove bacteria from the tissue spaces (C)</p> Signup and view all the answers

What causes the milky appearance of lymph in the thoracic duct?

<p>Absorption of long-chain fatty acids (A)</p> Signup and view all the answers

What is the primary difference between extracellular and intracellular edema?

<p>Extracellular edema involves excess fluid in the interstitial space, while intracellular edema involves excess fluid within cells (A)</p> Signup and view all the answers

Which of the following statements about lymphatic capillaries is correct?

<p>They are blind-ended vessels that drain into lymphatic vessels (C)</p> Signup and view all the answers

What is the final destination of lymph fluid in the body?

<p>It enters the superior vena cava and rejoins the bloodstream (A)</p> Signup and view all the answers

What is the net filtration pressure at the arterial end of the capillary?

<p>$13$ mmHg (D)</p> Signup and view all the answers

What is the primary cause of the net reabsorption at the venous end of the capillary?

<p>High plasma colloid osmotic pressure (C)</p> Signup and view all the answers

If the plasma colloid osmotic pressure ($\Pi_p$) decreases, what effect would this have on the net filtration pressure at the arterial end?

<p>Net filtration pressure would decrease (C)</p> Signup and view all the answers

What is the primary mechanism by which the excess fluid in the tissue is removed?

<p>Drainage by the lymphatic system (A)</p> Signup and view all the answers

What is the net filtration pressure in the kidney?

<p>$60$ mmHg (D)</p> Signup and view all the answers

If the interstitial fluid colloid osmotic pressure ($\Pi_{if}$) increases, what effect would this have on the net filtration pressure at the arterial end?

<p>Net filtration pressure would increase (B)</p> Signup and view all the answers

What is the primary driving force for filtration at the arterial end of the capillary?

<p>Capillary hydrostatic pressure ($P_c$) (D)</p> Signup and view all the answers

What is the net filtration pressure at the venous end of the capillary?

<p>$-7$ mmHg (A)</p> Signup and view all the answers

More Like This

Blood Circulation Overview Quiz
5 questions
Circulation: Blood Volume and Flow Control
3 questions
Maintaining Blood Volume and Osmotic Pressure
10 questions
Use Quizgecko on...
Browser
Browser