Structure L and I are the superior and inferior vena cava. They bring de-oxygenated blood from the body into the right atria.
<span>The kidneys are retroperitoneal (towards the back) high in the dorsal body wall both in humans and cats.</span>
Answer:
A) they help transport some substances through the membrane.
Explanation:
The membrane proteins that span the bilayer of phospholipids help in the transport of polar, large and charged substances across the membrane. The nonpolar core of the membrane does not allow these charged and polar substances to pass through. Proteins serving as channels form pores to allow movement of the specific substances.
On the other hand, carrier transport proteins of the membrane bind to the substances present at one side of the membrane and deliver them to the opposite side.
