What is the average number of heartbeats per minute of an adult person while resting? Explain why, the heart beats faster during and after an exercise .

What is the averages rate of the heart beats (per minute) in an adult?

What is the normal heart beat per minute in a healthy adult?

Normal range of breathing rate per minute in an average adult person at rest is

Thirty women were examined in a hospital by a doctor and the number of heart beats per minute were recorded and summarised as follows.Find the mean heart beats per minute for these women,choosing a suitable method.

Thirty women were examined in a hospital by a doctor and the number of heart beats per minute recorded and summarised as follows. Find the mean heart beats per minute for these women, choosing a suitable method. No. of heat 65-68 68-71 71-74 74-77 77-80 80-83 83-86 beats (per min.) No. of women: 2 4 3 8 7 4 2

Diagram below depicts an experiment to find the effect of temperature on the rate of photosynthesis. The average number of bubbles per minute at each temperature is given in the table. Describe and explain the change in rate of photosynthesis as the temperature is changed (i) from 17^@C to 30^@C . (ii) from 33^@C to 40^@C .

Assertion : There are 72-75 heart beats per minute on an average when a person is performing normal work Reason : One heart beat is completed in 0.8 second.

What will be the number of heartbeats per minute, if the stroke volume of heart increases, with total volume of heart increases, with total volume of blood remains same?