Question

How many times a normal man respires per minute?
A)10 - 15 times
B)14 - 18 times
C)20-25 times
D)25 -30 times

Answer 1

Hint: Breathing is the rate calculated by counting the number of times the chest is rising or dropping each minute. Respiratory rate is defined as the rate at which respiration occurs. This is generally measured in breaths per minute. For a resting adult, a normal respiratory rate can be low or high it varies based on age and activity

Complete answer:
Respiratory rate is usually defined as breathing rate. Breathing is the common method by which air is brought into and carbon out of the lungs such as exchange of gases occurs with the environment, mostly oxygen in taking and carbon dioxide flushing out. Respiration is a necessary process as it generates energy which is required for the body's normal and proper functioning. It passes oxygen into cells, and it propel out poisonous carbon dioxide.

Now let us find some information about given options:
10-15 times:- It is not normal breathing rate but a condition of slow breathing that is commonly known as Hypopnea. Thus, this option is not correct.
14 - 18 :- It is a point to remember that the respiratory rhythm centre includes three breathes for exhalation and two for inhalation . Thus average breath in 60 seconds comes out to be 12-18 and 15 constitute a number between 12-18 . Thus this option is correct.
20-25 :- In a 3 year child it is normal breathing rate at rest and not in adults . In adults the normal rate is 15-18 . Thus this option is not correct.
25-30 :- A baby from birth till 6 weeks of growth takes a breath in the range of 30-33 when at rest. Thus it is not of value for adults. So this option is not correct.

Hence, the correct answer is option (B)

Note: Respiratory rate is the rate at which respiration occurs. This is normally measured as breaths per minute. For a resting adult, a normal respiratory rate can vary based on age and activity but is typically between 12 and 20 breaths per minute. Normal breathing is commonly known as Eupnoea .