Man breaths how many times per minute?

(a) In normal breathing which of the following is an active process. Inspiration or expiration ? Also tell why ? (b) In normal human how many times normal breathing occurs at rest per minute ?

on an average , a healthy human breathes ______ times / minute

A radioactive substance of half-life 6 minutes is placed near a Geiger counter which is found to register 1024 particles per minute. How many particles per minute will it register after 42 minutes?

On an average, an adult human being at rest breathes 15-18 times per minute. The breathing rate, however, may differ under different conditions. Arrange the following activities given in the box in order of increasing breathing rates and given reason for your answer. sleeping, cycling, brisk walk, watching T.V