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Your muscles require oxygen/nutrients to move you, as you exercise/move your muscles need more and more, so your oxygen demand gets higher so you breathe more heavily and your heart beats faster to provide your body/muscles the oxygen it needs. Your heart is controlled by the smpathetic nerves and the parasmpatheitc nervs- two sets of chemicals called neropinephrine and epineprhine heart rate changes normally depending on many things including 1) some foods 2) your breathing rate For more information contact me http://wiki.answers.com/Q/How_heart_works&alreadyAsked=1
What else can I help you with?
What happened for the human heart to beat fast?
Sometimes you can get scared,frustarated or upset and your heart rate will increase.
How is the endocrine system responsible for your increased heart rate when you are scared?
Fear causes the release of adrenaline, also known as epinephrine, which has several physiological effects on the body including heart rate.
What factors can influence heart rate?
There are several things that can affect the heart rate. Exercise makes your blood pressure/ heart rate to rise because the heart has to pump blood faster. If you get scared or uncomfortable that can affect your heart rate.
When you afraid why your heart pumps very fast?
when you are afraid scared or excited adrenaline is released hence increasing heart beat rate. due to increase in heart beat rate your breathing rate increases as well. After sometime your impulse is send to your brain to stop the releasing of adrenaline and your heart beat rate decreases along with your breathing =) hope i answered your question
Can heart disease affect your life span?
It makes them scared to masturbate in public
Can your heart rate increase by wathcing tv?
Yes it can your heart rate can not only increase by exercising it also increases by how excited or happy and especially when you get scared. Have you ever watched a scary movie then felt your heart.
Dose your heart rate increase while watching horror movies?
The reason your heart rate increases is because you get scared you may not think your scared but you are and when your scared you heart pounds and increase the rate and as the movie reaches the climax the heart speeds up.
Why does a persons heart rate change?
because they need a change in heart rate.
Do dogs make your heart rate go up?
Yes, if you are scared of them your heart will beat faster
What would make an infants heart rate 245?
he/she may be scared???????????
What happened for the human heart to beat fast?
Sometimes you can get scared,frustarated or upset and your heart rate will increase.
Do rate and amplitude always change together in a frog heart?
Does the amplitude of the heart and heart rate always change together
Does your heart rate change your energy levels?
Yes, your heart rate will change your energy levels in many different ways. If you are working out you will have a higher heart rate and this will cause you to be tired after you work out.
Do bunnies die when they get scared?
No, bunnies do not die when they get scared. They may get stressed or have a higher heart rate, but fear alone does not cause death in bunnies.
How do you calculate percent heart rate change?
To calculate percent heart rate change, first determine the initial heart rate (HR_initial) and the final heart rate (HR_final). Use the formula: ((HR_{final} - HR_{initial}) / HR_{initial} \times 100). This will give you the percentage change in heart rate from the initial value to the final value. For example, if your initial heart rate is 70 bpm and your final heart rate is 80 bpm, the percent change would be ((80 - 70) / 70 \times 100 = 14.29%).
How fast does your heart rate beat when you're scared?
Apparantly during a panic attack my heart rate was 188 bpm. The doctors put the cause of this down to a "viral infection"!
How is the endocrine system responsible for your increased heart rate when you are scared?
Fear causes the release of adrenaline, also known as epinephrine, which has several physiological effects on the body including heart rate.
