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Doctor insights on: Why Do We Have Adrenaline In Our System

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Why do we have adrenaline in our system?

Why do we have adrenaline in our system?

Very important: It's your fight or flight hormone. It affects almost all parts of the body. It works differently in different parts of the body but in general it is responsible for getting you ready to run away or fight the immediate danger: increase breathing, increase heart rate, dilate your eyes so you can see better, break down fat to get energy, stimulate production of sugar for energy, contract muscles... ...Read more

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Dr. Theodore Davantzis
466 doctors shared insights

Adrenaline (Definition)

Adrenalin(e) / Epinephrine is the hormone produced by the adrenal medulla that speeds and strengths the heart, dilates the airways, and shifts blood flow to the muscles. Often this is in response ...Read more


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How much hemoglobin do we have in our bodies?

How much hemoglobin do we have in our bodies?

About 1.54 pounds: Normal adult Hb ~ 14 g/dL ; 14 g/dL * 10 dL / L * 5 L blood volume = 700 grams ; 700g * 1 lb / 453g ~ 1.54 pounds. Hope that answer was all you hoped for and more. ...Read more

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Do we as humans need sugar in our body and why? And we as human do we need salt in our body and why.

Do we as humans need sugar in our body and why? And we as human do we need salt in our body and why.

Yes & no: We need both sugar and salt in our bodies, but our bodies make sugar and eating extra sugar is harmful. We do not make salt and must get some in our diet. Our blood has the same concentration of salt as ocean water, and the biochemical reactions in our body take place in this water medium. ...Read more

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Why do we have saliva in our mouths?

Why do we have saliva in our mouths?

Many reasons: Saliva keeps your mouth moist, helps tongue function & starts the digestion process with an enzyme called amylase. Saliva antibodies & proteins are helpful in reducing dental bacteria & bacterial infections & also acts as a buffering agent which helps protect against the acid which would otherwise damage tooth enamel and lead to decay and tooth loss. ...Read more

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When we get tired, why do we feel the tiredness in our eyes?

When we get tired, why do we feel the tiredness in our eyes?

Eye Muscle Fatigue: We can experience fatigue in our eyes. The eyelids are controlled by muscles which can fatigue throughout the day. One can also have an undiagnosed refractive error which needs to be corrected causing this late day strain. Have an ophthalmologist evaluate this. ...Read more

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Why do they put aspartame and bisphenol a in our food and fluoride in our water? Do our bodies need these things?

Why do they put aspartame and bisphenol a in our food and fluoride in our water? Do our bodies need these things?

Chemicals: There are a number of chemicals in our foods and environment. The effects of all of these are not well studied or well known. But Bispnenol a and aspartame have evidence showing that they can cause adverse health effects. Our bodies do not need these. However fluoride does prevent tooth decay and it is an important ingredient in out toothpaste. ...Read more

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Why do they put aspartame and bisphenol a in our food and fluoride in our water? Do our bodies need these things?

Why do they put aspartame and bisphenol a in our food and fluoride in our water? Do our bodies need these things?

Fluoride: I would agree with your food additives questions. However, I believe that the benefits to the community outweigh any risks. The benefits of water fluoridation on the oral health has been documented on several scientific studies. The meager cost to fluoridate is worth the taxes spent. ...Read more

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What should we do when our brain cannot focus on our studies?

What should we do when our brain cannot focus on our studies?

Complicated Answer: Learning needs to be considered like training. It first starts off with the right attitude. I try to help my patients by asking them to get the dvd/cd on "how to become a superstar student" by the teaching company that outlines "the method to the madness!" other suggestions include mindfulness training and possible evaluation for adhd or a learning disability. There is more but not enough space. ...Read more

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Since we all have cancer cells in our body but our body fights them, but what causes those cells to eventually no longer be defeated by our immune system?

Since we all have cancer cells in our body but our body fights them, but what causes those cells to eventually no longer be defeated by our immune system?

Too many mutations: Cells do change and are recognized and disposed. Eventually a series of several changes do occur in the cell and once all of these have happened does the cell proliferates in the manner we associated with cancer. ...Read more

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What role does iron play in our body and why do we need it?

What role does iron play in our body and why do we need it?

Many : Used to produce red blood cells. Also many enzymes use it .Effects all parts of the body. ...Read more

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Wondering why should we increase our metabolism?

Wondering why should we increase our metabolism?

^ metabolism: You can increase metabolism by remaining physically active, building muscles and by maintaining adequate caloric intake. ...Read more

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Why do people say we all start out in the womb?

Why do people say we all start out in the womb?

Your kidding,right !: While human fertilization occurs in the fallopian tube, the pregnancy itself will not really start until the fetal cells implant in the womb. Failure to implant leads to shedding of the products of conception.Implantation begins the formation of the early placenta & cord, which nourishes the developing fetal cells.So, in fact, we all start out in the womb. ...Read more

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Where can we find our pulse in our leg?

Where can we find our pulse in our leg?

Several sites: People can find their pulse in the crease of their groin, behind their knee, behind the inner part of their ankle and on the top of their foot. This is generally harder to find than the wrist or neck though. ...Read more

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Why does our immune system sometime overact to harmless allergens? Instead of using suppressants, can we tell our body to ignore specific allergens?

Why does our immune system sometime overact to harmless allergens? Instead of using suppressants, can we tell our body to ignore specific allergens?

Ah, super question: Within this question lies the mysteries of the immune system, allergy, and immunology. (karthik, are you an allergist-:). Why does body make antibodies to its' own tissue? What are evolutionary 'advantages' for survival 'allowing' this to happen? Was it always this way? Is it largely our fault-shield our kids too much, everything becomes 'foreign'? How is brain involved? Need a textbook 4 here? ...Read more

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For what reasons do we lose our sense of taste and smell when we have severe cold?

For what reasons do we lose our sense of taste and smell when we have severe cold?

Inflammation: When one has a viral upper respiratory infection, the mucous membranes within the nasal cavities become swollen. The olfactory (smell) nerve comes from the brain and enters the nose through the cribriform plate. The nerve endings detect the odorants that are inhaled through the nose. The swelling associated with a cold prevents smells from being sensed. Taste is impaired without sense of smell. ...Read more

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What would happen if we had no natural killer cells in our bodies?

What would happen if we had no natural killer cells in our bodies?

Vulnerable: We would likely be very vulnerable to viral infections and certain types of cancers, especially melanoma. ...Read more

Dr. Mohammad Shahzad
1,005 doctors shared insights

Epinephrine (Definition)

Epinephrine is a rhythm control agent which is a ...Read more