The lining attached to the lungs is called the visceral pleurae.
Natural selection, is based upon the principle of "Survival of The Fittest" ensures that those who are more well adapted, especially having a better immune system, will survive. and the weaker ones will die out. Human evolution made the human immune system even better as time went by, and the system was more well adapted to diseases it was more exposed to like the Europeans were more resilient to smallpox than the native americans
Answer:
e) all of the above are methods of hormone action
Explanation:
Hormones are the chemicals that are secreted by endocrine glands mostly. They serve to regulate physiological processes. Most of the lipid-soluble hormones such as steroid hormones enter the target cell to bind to their cytosolic or nuclear receptors and alter the expression of genes. These hormones stimulate the expression of some genes and inhibit that of others.
Binding of hormones to the cell surface receptors associated with ion channels regulates their opening and closing and thereby affects the membrane permeability. Likewise, the active hormone receptor complexes regulate the electrical signaling pathways of muscles and neurons.
More dense means something has more molecules per volume. Less dense means that something has less molecules per volume.
Think of cheesecake vs. a regular cake. In a regular cake, there are often holes within the cake, making it light and fluffy. In a cheesecake, the cake is packed and there is not very much room in between the molecules. This is why some people refer to cheesecake as a "dense" cake.
