Answer:
The two main reasons are nonpolar core of the bilayer and the active transport.
Explanation:
The membrane is structured to have two outer layers that are polar and an inner layer that is nonpolar.
If a membrane protein is exposed to the solvent, i<em>t will also have a polar side. It would be very difficult for the polar face of the membrane to move through the nonpolar core of the bilayer.</em> Therefore, this model is not feasible.
One major form of transport, active transport, moves solutes up the concentration gradient. <em>The binding of a solute and then release on another side of the membrane would only work for facilitated diffusion because it would cause a net movement of solutes down the concentration gradient.</em> It is unclear how energy could be expended to drive this process in the transverse carrier model.<em> Therefore, the transverse carrier model does not explain active transport.</em>
Answer: D) Pulmonary and aortic valves.
Explanation
There are two main heartbeats from a healthy heart.
The first beat is called the S1 or the lub, and it occurs when the atrioventricular valves (comprising the mitral and tricuspid valves) close.
The second beat is called the S2 or the dub, and it occurs when the semilunar valves (comprising the aortic and pulmonary valves) close.
Listening for heart beats is an essential part of cardiac auscultation.
The turbidity of water measures how much Suspended particles are present in the water
<h3>Meaning of Turbidity</h3>
Turbidity can be defined as a method or approach that measures the level of transparency possessed by a liquid primarily water.
Turbidity ascertain that a liquid is clear or full of suspended particles in it by passing light through the liquid.
In conclusion, The turbidity of water measures the amount of Suspended particles present in the body of water
Learn more about turbidity: brainly.com/question/1150974
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Humidity. I think you need to work on your grammar a little bit pal, if you ever need help with ELA homework, hmu.
