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CBSE Class 10 Answered

sir can you tell me which factor depends on the bitting or contiueity of heart and how that factor is produced ?
Asked by krishdabhoya2003 | 22 Jun, 2018, 08:44: PM
answered-by-expert Expert Answer
Heart rate increases when heat is gained by the body such as in hot climates and during exercise in order to transfer more heat away from the body. When the body loses heat such as in cold weather or a cold shower, heart rate decreases to preserve core temperature.
 
There are various factors that influence heart beat such as: 
1. When larger quantities of food are consumed, heart rate may be increased for a longer period of time compared to after eating a small meal or snack. Heart rate can rise above 100 beats per minute.
 
2. Heart rate can increase two to three times above resting heart rate depending on the intensity and duration of exercise. 
 
3. Maximum heart rate decreases as you get older due to the physiological effects of aging.
 
4. Caffeine is a stimulant drug that influences the nervous system to increase heart rate. It mimics the effect of adrenaline, a natural hormone in the body responsible for elevating heart rate.
Answered by Sivanand Patnaik | 23 Jun, 2018, 10:58: AM
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