According to the Starling Equation, which ONE of the following would NOT be a fa

Question

According to the Starling Equation, which ONE of the following would NOT be a factor in the net filtration pressure controlling the movement of water across the capillary wall? Select one: The number and size of the pores in the capillary wall. O The concentration of Na n the interstitial fluid The interstitial fluid pressure. The plasma protein concentration. Hydrostatic (blood) pressure in the capillary. Which ONE of the following statements is INCORRECT? Increased sympathetic nervous system activity to the sinoatrial node: Select one: decreases the slope of the spontaneous depolarisation of these action potentials. increases the frequency of action potentials generated causes an increase in heart rate. results in a less negative membrane potential at the end of repolarisation. allows threshold to be reached more quickly. Myogenic mechanisms involved in autoregulation of blood flow are activated by Select one: the K in surrounding tissue. the CO2 in surrounding tissue. altered intra-luminal blood pressure. endothelium-derived vasoactive factors. generation of local vasoactive substances.

Explanation / Answer

I shall answer the first four questions :

1. Ans is a.

According to Starling equation, net filtration pressure is dependent on the osmotic and hydrostatic pressures in capillaries and interstitial fluid. There is no role of number of pores or pore size.

Ans 2. e. Sympathetic stimulation leads to more negative membrane potential at end of repolarization.

And 3. c. It depends on intraluminal arterial pressure, which causes stretching of vessel wall and activating myogenic mechanism. It follows Laplace's law.

Ans 4. c. It is called Bainbridge reflex and mediated by atrial and venacaval receptors present at the veno-atrial junction.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.