Mastering Poiseuille's Law
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Questions and Answers

Which of the following is a function of the lymphatic system?

  • Producing red blood cells
  • Transporting oxygenated blood
  • Draining excess tissue fluids (correct)
  • Breaking down fats

    • What is the term for tissue swelling caused by the accumulation of fluid in the lymphatic system?

  • Hydrostatic pressure
  • Hypertension
  • Lymph edema (correct)
  • Edema

    • Which type of cells are found in the germinal centers of lymph nodes?

  • Lymphocytes (correct)
  • Red blood cells
  • Platelets
  • Neutrophils

    • What drives filtration in the capillary bed?

    <p>Hydrostatic pressure</p> Signup and view all the answers

    Which blood vessels conduct blood away from the heart?

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

    What is the formula for calculating pulse pressure?

    <p>Systolic pressure - Diastolic pressure</p> Signup and view all the answers

    Which blood vessels are known as volume reservoirs?

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

    What is the driving force of blood flow from and back to the heart?

    <p>Mean arterial pressure</p> Signup and view all the answers

    Which type of capillary is the most permeable?

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

    Which of the following is responsible for automatically dilating or constricting blood vessels based on chemical needs in the surrounding tissue?

    <p>Local control</p> Signup and view all the answers

    What is the formula for mean arterial pressure (MAP)?

    <p>MAP = CO * R</p> Signup and view all the answers

    What happens to blood pressure if blood volume increases?

    <p>Blood pressure increases</p> Signup and view all the answers

    Which of the following is responsible for controlling the diameter of the bronchioles?

    <p>Smooth muscle</p> Signup and view all the answers

    What is the function of surfactant in the respiratory system?

    <p>Prevents alveoli from collapsing</p> Signup and view all the answers

    What is the primary function of the muco-ciliary escalator?

    <p>To trap pathogens</p> Signup and view all the answers

    Which law states that the sum of the partial pressures in a container add up to the total pressure in the system?

    <p>Dalton's law</p> Signup and view all the answers

    Which chambers of the heart are responsible for receiving blood?

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

    What is the formula for total lung capacity (TLC)?

    <p>TLC = TV + IRV + ERV + RV</p> Signup and view all the answers

    What happens to intrapleural pressure during inhalation?

    <p>It decreases</p> Signup and view all the answers

    What is the relationship between resistance and blood flow?

    <p>Resistance is inversely proportional to flow</p> Signup and view all the answers

    According to Poiseuille's law, which factor is directly related to resistance?

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

    Which factor is inversely related to resistance according to Poiseuille's law?

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

    What happens to resistance when the radius of a blood vessel increases?

    <p>Resistance decreases</p> Signup and view all the answers

    Which valves prevent blood from flowing backwards?

    <p>Both atrioventricular and semilunar valves</p> Signup and view all the answers

    Which of the following is true about the cardiac refractory period compared to the skeletal muscle refractory period?

    <p>The cardiac refractory period is longer than the skeletal muscle refractory period.</p> Signup and view all the answers

    What is the resting membrane potential of autorhythmic cells?

    <p>-60mV</p> Signup and view all the answers

    What happens when the ion funny channel opens in autorhythmic cells?

    <p>Influx of sodium raises membrane potential to -40mV.</p> Signup and view all the answers

    What is the role of slow potassium gates in repolarization?

    <p>They close and cause hyperpolarization.</p> Signup and view all the answers

    What does the plateau phase in cardiac cells allow for?

    <p>A complete contraction and relaxation of a cell.</p> Signup and view all the answers

    What is the membrane potential raised to when the ion funny channel opens in autorhythmic cells?

    <p>-40mV</p> Signup and view all the answers

    Which of the following is a function of lymphatic capillaries?

    <p>Draining excess tissue fluids</p> Signup and view all the answers

    What causes lymph edema (tissue swelling)?

    <p>Increased hydrostatic pressure</p> Signup and view all the answers

    What is the role of lacteals in the lymphatic system?

    <p>Transporting fats from the intestines</p> Signup and view all the answers

    What drives filtration in the capillary bed?

    <p>Hydrostatic pressure</p> Signup and view all the answers

    Which of the following is responsible for the movement of nutrients and waste between the capillaries and surrounding tissues?

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

    Which type of capillary is found in the intestines and the kidneys, and has a high exchange rate of nutrients and waste?

    <p>Fenestrated capillaries</p> Signup and view all the answers

    Which of the following is responsible for automatically dilating or constricting blood vessels based on chemical needs in the surrounding tissue?

    <p>Local control</p> Signup and view all the answers

    What is the formula for calculating mean arterial pressure (MAP)?

    <p>MAP = CO * R</p> Signup and view all the answers

    Which of the following is responsible for maintaining the tension that keeps the lungs inflated?

    <p>Pleura fluid</p> Signup and view all the answers

    What is the function of the muco-ciliary escalator?

    <p>To trap pathogens and get rid of them</p> Signup and view all the answers

    According to Boyle's law, what happens to the pressure in a container when the volume decreases?

    <p>The pressure increases</p> Signup and view all the answers

    What is the formula for calculating the inspiratory capacity (IC)?

    <p>IC = TV + IRV</p> Signup and view all the answers

    What is the formula for calculating cardiac output (CO)?

    <p>CO = stroke volume * heart rate</p> Signup and view all the answers

    What is the role of arterioles in the circulatory system?

    <p>To maintain blood pressure</p> Signup and view all the answers

    What is the function of capillaries in the circulatory system?

    <p>To exchange nutrients and waste in capillaries</p> Signup and view all the answers

    What is the primary function of veins in the circulatory system?

    <p>To store blood volume</p> Signup and view all the answers

    Which of the following equations represents the total lung capacity (TLC)?

    <p>TLC = TV + IRV + ERV + RV</p> Signup and view all the answers

    Which of the following statements about intrapleural pressure during inhalation is correct?

    <p>Intrapleural pressure increases during inhalation</p> Signup and view all the answers

    Which of the following chambers of the heart are responsible for receiving blood?

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

    Which of the following statements about blood vessel diameter is correct?

    <p>Vasoconstriction increases pressure and decreases flow</p> Signup and view all the answers

    According to Poiseuille's law, which factor has an inverse relationship with resistance?

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

    What is the formula for velocity (V) in terms of flow rate (Q) and total cross-sectional area (A)?

    <p>$V = Q/A$</p> Signup and view all the answers

    Which valves open during ventricular contraction (ventricular systole) and close during ventricular relaxation (ventricular filling or ventricular diastole)?

    <p>Semilunar valves</p> Signup and view all the answers

    What is the primary function of autorhythmic cells in the heart?

    <p>To generate their own electrical signal</p> Signup and view all the answers

    Which of the following is true about the resting membrane potential of autorhythmic cells?

    <p>It is around -60mV.</p> Signup and view all the answers

    What happens when the ion funny channel opens in autorhythmic cells?

    <p>Influx of sodium raises the membrane potential to -40mV.</p> Signup and view all the answers

    What is the primary function of the slow potassium gates in repolarization?

    <p>To open and allow efflux of potassium ions.</p> Signup and view all the answers

    What is the relationship between resistance and blood flow?

    <p>They are inversely proportional.</p> Signup and view all the answers

    What is the driving force of blood flow from and back to the heart?

    <p>Difference in pressure</p> Signup and view all the answers

    What does the plateau phase in cardiac cells allow for?

    <p>A complete contraction and relaxation of a cell</p> Signup and view all the answers

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