In breathing movements, the air volume can be estimated by
Spirometry is the process of recording the changes in the volume and movement of air in and out of the lungs and the instrument used for this purpose is called spirometer or respirometer.
R.Q. for glucose is
C6H12O6 + 6O2 → 6CO2 + 6H2O
Respiratory quotient is defined as
The respiratory quotient (RQ) is the ratio of CO2 produced to O2 consumed while food is being metabolized:
RQ = CO2 eliminated/O2 consumed
The vital capacity of the lungs includes
The vital capacity (VC) is the maximum volume exhaled after maximum inhalation (IRV + TV + ERV). The total lung capacity (TLC), about 6 L, is the maximum amount of air that can fill the lungs (IRV + TV + ERV + RV).
Dead space air in man is______
Dead space is the volume of air which is inhaled that does not take part in gas exchange because it remains in the conducting airways or it reaches alveoli that are not perfused or poorly perfused.
A person breathes in some volume of air by forced inspiration after having a forced expiration. This quantity of air taken in is
The maximum volume of air that a person can breathe in after forced expiration or the maximum volume of air that a person can breathe out after forced inspiration is called vital capacity. The value of vital capacity varies from 3400 mL to 4800 mL.
On the other hand, tidal volume is the air inspired or expired during normal breathing. Total lung capacity is the volume of air present in lungs and respiratory passage after maximum inspiration. Whereas, inspiratory capacity is total volume of air that a person can inspire after normal inspiration.
Which of the following statements is correct?
During inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. During expiration, the diaphragm and intercostals relax, causing the thorax and lungs to recoil.
In humans, which among these is not a step in respiration?
The aerobic respiration involves utilization of oxygen for the breakdown of chemical bonds in glucose to release energy in high amounts. All the organisms that obtain energy by aerobic respiration cannot live without the oxygen. This is because if there is no oxygen, they cannot get energy from the food which they eat. Option a is incorrect.
The amount of volume of air which can be inspired/expired normally is called
Tidal volume (TV) measures the amount of air that is inspired and expired during a normal breath.
Residual volume is
Tidal volume is approximately 500ml while residual volume is 1100-1200 ml.