fingertip, back of neck, back of hand palm, forearm
Just guessing
The answer is B, trust me, I did this one before
Answer:
Explanation:The phospholipid bilayer formed by these interactions makes a good barrier between the interior and exterior of the cell, because water and other polar or charged substances cannot easily cross the hydrophobic core of the membrane. Can water cross the plasma membrane at all?
It also helps the cell move things in and out. The cell membrane is made of what is called a phospholipid bilayer, which means it has two layers of phospholipids. ... This allows the phosphates to be exposed to water, either in the cell or the environment, while the lipids are protected from water Lipids are essential for all life on Earth. They play many important roles in maintaining the health of an organism. Arguably the most important function lipids perform is as the building blocks of cellular membranes. Other functions include energy storage, insulation, cellular communication and protection.Large quantities of water molecules constantly move across cell membranes by simple diffusion, often facilitated by movement through membrane proteins, including aquaporins. In general, net movement of water into or out of cells is negligible.
As people age there one become more porous due to loss of calcium and phosphate and osteoporosis.
<u>Explanation</u>:
Osteoporosis is a condition in which the bones become brittle and easy to break on injury which results due to the loss of calcium from the bones. Many health problems and aging can lead to the disease of osteoporosis like breast cancer, prostrate cancer, depression, rheumatoid arthritis, Sickle Cell disease, Parkinson's disease, thalassemia, and many others.
The decreased density of the bone can be detected with the help of bone density x-ray. In females osteoporosis is common after menopause in which the drop of estrogen hormone levels cause the loss of calcium absorption in the bones.
The use of highlighting pens can increase your understanding of a text by: Helping you stay focused, as well as helping you to keep track of the most important part of a text.
<h3>Meaning and use of a Highlighting pen</h3>
A highlighting pen as the name implies is a pen with a unique feature used for marking a particular word, group of words and sentences to stand out in a page.
The highlighting pen is used for so many things in schools, churches, and organization these include: Marking a page, noting a key word, marking a word is yet to be understood etc.
In conclusion, The use of highlighting pens can increase your understanding of a text by: Helping you stay focused, as well as helping you to keep track of the most important part of a text.
Learn more about Highlighting pen : brainly.com/question/245311
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