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Answer to Question #11358 in Biochemistry for Joe

Question #11358
Hi I need to know what the effects are on the body when certain chemicals and hormones are released/increased short term in the human body.

Example: when adrenaline gets increased the heart beats faster.....

1. Dopamine
2. Serotonin
3. Phenylethylamine
4. Adrenaline(Norepinephrine)
5. Oxytocin
6. Vasopressin
7. Endorphins

Thank you so much for your time and I greatly appreciate your input with my research assignment!

Expert's answer
1. Dopamine functions as a neurotransmitter—a chemical released by nerve cells to send signals to other nerve cells, as an
medication produces effects such as increased heart rate and blood pressure.
2. Serotonin serves as a vasoconstrictor and helps to regulate hemostasis and blood clotting, also as a neurotransmitter.
3. Phenylethylamine functions as a neuromodulator or neurotrasmitter in the mammalian central nervous system.
4. An increase in norepinephrine from the sympathetic nervous system increases the
rate of contractions. It underlies the fight-or-flight response, directly increasing heart rate, triggering the release of glucose from energy stores, and increasing blood flow to skeletal muscle. It increases the brain's oxygen supply.
5. Oxytocin causing milk to be 'let down' into subareolar sinuses, from where it can be excreted via the nipple. It causes contractions during the
second and third stages of labor.
6. Vasopressin is responsible for increasing water absorption in the collecting ducts of the
kidney nephron. Vasopressin increases water permeability of kidney collecting duct.
7. Endorphins have the abilities to produce analgesia and a feeling of well-being.

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