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

Which blood vessels conduct blood away from the heart?

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

What is the formula for calculating pulse pressure?

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

Which blood vessels are known as volume reservoirs?

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

Which type of capillary is the most permeable?

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

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

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

What happens to blood pressure if blood volume increases?

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

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

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

What is the function of surfactant in the respiratory system?

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

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

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

Which chambers of the heart are responsible for receiving blood?

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

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

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

What happens to intrapleural pressure during inhalation?

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

What is the relationship between resistance and blood flow?

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

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

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

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

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

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

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

Which valves prevent blood from flowing backwards?

<p>Both atrioventricular and semilunar valves (C)</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. (C)</p> Signup and view all the answers

What is the resting membrane potential of autorhythmic cells?

<p>-60mV (C)</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. (B)</p> Signup and view all the answers

What is the role of slow potassium gates in repolarization?

<p>They close and cause hyperpolarization. (A)</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. (C)</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 (D)</p> Signup and view all the answers

Which of the following is a function of lymphatic capillaries?

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

What causes lymph edema (tissue swelling)?

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

What is the role of lacteals in the lymphatic system?

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

What drives filtration in the capillary bed?

<p>Hydrostatic pressure (D)</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 (D)</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 (A)</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 (C)</p> Signup and view all the answers

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

<p>MAP = CO * R (B)</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 (A)</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 (B)</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 (C)</p> Signup and view all the answers

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

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

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

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

What is the role of arterioles in the circulatory system?

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

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

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

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

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

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

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

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

<p>Radius (A)</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>$V = Q/A$ (D)</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 (D)</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 (C)</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. (C)</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. (D)</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. (B)</p> Signup and view all the answers

What is the relationship between resistance and blood flow?

<p>They are inversely proportional. (B)</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 (A)</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 (A)</p> Signup and view all the answers

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