The defecation reflex involves two postive feedback loops. these loops are the stretch receptors in the rectal walls and the sacral parasympathetic system. Defecation reflex empties the rectum by peristaltic movements push fecal matter from the sigmoid colon into the rectum. Then this distension of the rectal walls stimulates stretch receptors which results in defecation.
Answer:
lower gas prices
Explanation:
If people are evacuating, the owner of the gas station isn't there to lower the price, and even then, they would only improve the price, so they can get more money, just like when you need to get water at a store for a hurricane, they DON'T LOWER IT!!!
Nucleotides play different roles such as being the building blocks of nucleic acids, energy storage, cellular signaling, enzymatic cofactors, etc.
- Nucleotides are the building blocks of nucleic acids (either DNA or RNA).
- These molecules (nucleotides) are composed of one pentose sugar, a nitrogenous base, and one or more phosphate groups.
- In DNA, there are four types of nucleotides, each containing one different nitrogenous base (i.e., Adenine, Guanine, Cytosine and Thymine).
- Adenosine triphosphate (ATP) is a nucleotide that represents the energy coin of the cell, which is used to carry out different metabolic functions (e.g., growth, differentiation, reproduction, etc).
In conclusion, nucleotides play different roles such as being the building blocks of nucleic acids, energy storage, cellular signaling, enzymatic cofactors, etc.
Learn more about nucleotides here:
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Blood is pushed through the organism by the heart, and brings nutrients and oxygen to our tissues. It also takes away waste and carbon dioxide from tissues.
