It's caused by blood pooling in the legs, so there's insufficient return to the heart and brain. Normally, moving one's legs helps to pump blood back to the heart through muscle contraction. Locking the knees makes standing still easier, but reduces use of the leg muscles. In some people, this pooling may lead to hypoperfusion of the brain and fainting, which is essentially the body's way of putting the brain and the legs and the heart at the same level.
Answer:
1.) Nucleic acid is an important class of macromolecules found in all cells and viruses.
2.) Two examples of nucleic acids include deoxyribonucleic acid (better known as DNA) and ribonucleic acid (better known as RNA). These molecules are composed of long strands of nucleotides held together by covalent bonds.
3.) Amino acids are the monomers that make up proteins.
4.) Phosphorus, Selenium, Iron, Zinc, Copper, Manganese, and Potassium.
5.) Protein helps repair and build your body's tissues, allows metabolic reactions to take place and coordinates bodily functions.
6.) Actin, tubulin, keratin.
You're welcome. Took a while, but worth it--
Answer:
I'm not sure but I think it is parasitic
The group that doesn't receive treatment/medicine.
