A student claims, "In order to maintain homeostasis, the body utilizes a variety of feedback mechanisms." Which of the following is an example of a positive feedback mechanism that could be used to support this statement? a. O2 levels in the blood increase and CO2 levels decrease. The brain tells the muscles of the diaphragm to inhale and exhale more rapidly. As O2 and CO2 levels returns to normal, the organism's breathing returns to normal.

b. During childbirth, the release of the hormone oxytocin stimulates uterine contractions, which in turn stimulates the release of more oxytocin.

c. An increase in body temperature causes humans to secrete a watery fluid in the form of perspiration. As the fluid evaporates from the skin removing the excess heat, the body stops perspiring.

d. High levels of glucose cause the pancreas to secrete more insulin. As glycogen forms from glucose, glucose levels decline and the pancreas stops secreting insulin.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.