Subject :NSO Class : Class 7
Read the given statements and select the correct option.
Statement 1 : During heavy physical exercise, the
breathing rate of an adult human being can increase
up to 25 times per minute.
Statement 2 : Faster breathing rate supplies more
oxygen to the body cells for speedy breakdown of food
for releasing more energy required during exercise.
A Both statements 1 and 2 are true and statement 2
is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2
is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.
shouldn't fast breathing make oxygen around us thinner and hence so anaerobic respiration takes place.