The answer is Convergence of images behind the Retina
Convex lens converges light to a principal focus. The thickness of the lens determines the focal length (distance between the center of the lens and the principal focal point). Therefore, by evaluating the thickness of the convex lens, farsightedness, (an eye defect of convergence of images behind the retina) can be corrected by enabling images in the eye to form behind the retina.
Answer:
Fnet=F1+F2-F3=40+20-30=60-30=30N
F=ma
30N=30a
a=30/30
a=1m/s^2
Believe me , biology is another thing.
Answer:
The pressure flow theory states that water with food molecules inside of it moves through the phloem of a plant through pressure. This theory is meant to explain how food moves around inside plants. The pressure flow theory notes that pressure is created through water being pulled into the cells of the plant. The water cells are pulled into the plant when a diffusion gradient exists. This gradient creates a change in pressure, which forces osmosis.
Explanation:
The influence of the fast-acting inhibitor of t-PA on clot lysability by endogenous or exogenous t-PA was investigated by immersing clots prepared from normal or inhibitor-rich plasma (endogenous inhibitor) in normal or inhibitor-rich plasma (exogenous inhibitor). Exogenous t-PA inhibitor efficiently neutralizes clot lysis by both exogenous and endogenous t-PA. Endogenous t-PA inhibitor, however, efficiently neuralizes endogenous t-PA but has little influence on clot lysis by exogenous t-PA. These findings indicate that t-PA inhibitor is not concentrated into a clot and that t-PA inhibitor in plasma efficiently neutralizes t-PA incorporated in a clot.
α2-Antiplasmin depleted plasma clots were more susceptible to lysis by both endogenous and exogenous t-PA than normal clots. Removal of α2-antiplasmin from the surrounding plasma resulted in even shorter lysis times.
It is concluded that not only the concentrations of t-PA and of t-PA inhibitor play a role in the regulation of thrombolysis, but also their distribution between the clot and the surrounding plasma. In addition, α2-antiplasmin counteracts clot lysis significantly.