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Inspiration occurs when

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Important Questions on Respiration and Circulation

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Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Explain the mechanism of inspiration and expiration.
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Which is the correct sequence of the air passage in man?
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Write the steps of expiration steps in human being.
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Draw a labelled diagram of the mechanism of inspiration and expiration.
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Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Inspiratory reserve volume (IRV) is normally between _____.
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
A person suddenly starts coughing while swallowing food. This coughing would have been due to improper movement of
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Biology>Physiology>Respiration and Circulation>Mechanism of Breathing

Assertion (A): Biconcave shape of mammalian RBC facilitates gas exchange.

Reason (R): Biconcave shape provides a high surface to volume ratio.

EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
The maximum number of oxygen molecules that can bind to one molecule of hemoglobin is:
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
If you exhale multiple times into a conical flask containing lime water through a single inlet fixed through a stop cork, lime water will?
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
The atmospheric pressure is 760 mm Hg at the sea level. Which of the following ranges is nearest to the partial pressure of CO2 in mm Hg?
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Human fetal hemoglobin differs from the adult hemoglobin in that it has:
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing

Match the following respiratory capacities and respiratory volumes of a normal human adult?

Respiratory capacities Respiratory volumes
i) Residual volume a)  2800 mL
ii) Vital capacity b)  3000 mL
iii) Inspiratory reserve volume c)  1100 mL
iv) Inspiratory capacity d)  4000 mL

 

EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Which of the following factors are favourable for the formation of oxyhaemoglobin in the alveoli human lungs?
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Which of the following is not the function of conducting part of respiratory system?
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
The process in which atmospheric air with 21% of O2 is drawn in and alveolar air rich in CO2 is sent out is called        
HARD
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
When does the increase in the volume of thoracic chamber take place in the dorsoventral axis? 
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing

Select the correct events that occur during inspiration.

(a) Contraction of diaphragm
(b) Contraction of external intercostal muscles
(c) Pulmonary volume decreases
(d) Intrapulmonary pressure increases

HARD
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Which of the following statement is correct, with reference to mechanism of breathing?
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Read the following statements (A – D).

(A) The movement of air in and out of the lungs is carried out by creating a pressure gradient between the lungs and atmosphere.
(B) Inspiration can occur if the pressure within the lungs is more than the atmospheric pressure.
(C) Expiration takes place when the intrapulmonary pressure is lesser than the atmospheric pressure.
(D) The diaphragm and a specialized set of intercostal muscles in between the ribs help in the generation of such pressure gradients for breathing.

How many of the following statements are correct?