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Expiratory capacity - Inspiratory capacity + X = Functional residual capacity. X in this equation is
 

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Important Questions on Breathing and Respiration

MEDIUM
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Given that tidal volume is 600 ml, inspiratory reserve volume is 2500 ml, and expiratory reserve volume is 800 ml, what is the value of vital capacity of lung ?
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
After forceful inspiration, the amount of air that can be breathed out with maximum forced expiration is equal to
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Match the items given in Column I with those in Column II and select the correct option given below:
 
  Column – I   Column – II
a. Tidal volume i. 2500 – 3000 mL
b. Inspiratory Reserve volume ii. 1100 – 1200 mL
c. Expiratory Reserve volume iii, 500 – 550 mL
d. Residual volume iv. 1000 – 1100 mL
MEDIUM
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Lungs does not collapse between breaths and some amount of air will always remain in the lungs which can never be expelled because,
MEDIUM
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Match the following related to respiratory volumes and capacities.
Column I Column II
i Tidal volume a 2500 to 3000 ml of air
ii Inspiratory reserve volume b 1000 ml of air
iii Expiratory reserve volume c 500 ml of air
iv Residual volume d 3400 to 4800 ml of air
v Vital capacity e 1200 ml of air
EASY
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Vital capacity of lung is ______ .
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
The amount of air that is left behind in lungs after expiratory reserve volume has been exhaled is
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
The Total Lung Capacity(TLC) is the total volume of air accomodated in the lungs at the end of a forced inspiration. This includes:
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of:
MEDIUM
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
What is vital capacity of our lungs ?
MEDIUM
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Listed below are four respiratory capacities (i-iv) and four jumbled respiratory volumes of a normal human adult:  

 
  Respiratory capacities           Respiratory volumes
(i) Residual volume      (a) 2500 mL
(ii) Vital capacity            (b) 3500 mL
(iii) Inspiratory reserve volume      (c) 1200 mL
(iv) Inspiratory capacity                  (d) 4500 mL

Which one of the following pairs of capacities and volumes is matched correctly with each other?
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Residual volume is:
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
If a person exhales out forcefully by applying all his efforts, what will the pulmonary volume inhaled by him immediately under normal condition without applying any extra effort?
MEDIUM
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Read the following statements.

a) High H+ concentration and higher temperature are favourable for dissociation of oxygen from oxyhaemoglobin.

b) Partial pressure of oxygen in alveoli is higher than in the tissue.

c) The maximum volume of air a person can breathe in after a forced expiration is vital capacity.

d) In alveoli, low pCO2 and high pO2 favour dissociation of CO2 from carbaminohaemoglobin.

How many of the above statements are correct?
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
The vital capacity of human lungs is equal to
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Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
All of the following options are correct except::-

i. TLC = VC + RV

ii. VC = ERC + IRV

iii. VC = IRC + ERV

iv. RV = TLC - ERV + TV + IRV
MEDIUM
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
Select the correct option regarding respiratory volumes.
MEDIUM
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes
About 1200 mL of air is always known to remain inside the human lungs. It is described as
EASY
Biology>Human Physiology>Breathing and Respiration>Respiratory Volumes

Match the following

Column I Column II
a. Tidal volume (i) 1100 to 1200 ml
b. Inspiratory reserve volume  (ii) 500 ml 
c. Expiratory reserve volume (iii) 2500 ml to 3000 ml
d. Residual volume (iv) 1000 ml to 1100 ml