Breathing and Exchange of Gases

Sponges exchange $\mathrm{O}_2$ with $\mathrm{CO}_2$ by $\_\_\_\_$ .

In water, frogs respire using $\_\_\_\_$ .

\(\text { Match List I with List II: }\)
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\(\text { Match List-I with List-II. }\)


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In humans, respiration occurs in the following steps. Arrange these steps in the correct order.
A. Diffusion of $\mathrm{O}_2$ and $\mathrm{CO}_2$ between blood and tissues
B. Diffusion of $\mathrm{O}_2$ and $\mathrm{CO}_2$ across alveolar ...

Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs.
Choose the correct answer from the following :

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: During the transportation of gases, about 20-25 percent of CO\(_2\) is carried by Haemoglobin as carbamino-haemoglobin.
Reaso...

Match List-I with List-II:

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Match List I with List II:

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Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?

Given below are two statements : one is labelled as
Assertion (A) and the other is labelled as Reason
(R).
Assertion (A) : A person goes to high altitude and experiences "Altitude Sickness" with symptoms like breathing difficulty and he...

Select the sequence of steps in Respiration.
(A) Diffusion of gases (O2 and CO2) across alveolar
membrane.
(B) Diffusion of O2 and CO2 between blood and tissues.
(C) Transport of gases by the blood
(D) Pulmonary ventilation by which at...

Vital capacity of lung is ________.

Which of the following statements are correct with respect to vital capacity?
(a) It includes ERV, TV and IRV
(b) Total volume of air a person can inspire after a normal expiration.
(c) The maximum volume of air a person can breathe in afte...

Identify the region of human brain which has pneumotaxic centre that alters respiratory rate by reducing the duration of inspiration.

Which of the following is not the function of conducting part of respiratory system?

Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver ____________ ml of O2 to the tissues.

Assertion (A) : A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations.Reason (R) : Due to low atmospheric pressure at high altitude, the body does not get sufficien...

The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are :

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

Select the correct events that occur during
inspiration.
(i) Contraction of diaphragm
(ii) Contraction of external inter-costal muscles
(iii) Pulmonary volume decreases
(iv) Intra pulmonary pressure increases

Identify the wrong statement with reference to
transport of oxygen.

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?

Which of the following options correctly
represents the lung conditions in asthma and
emphysema, respectively?

Which of the following is an occupational
respiratory disorder?

Match the items given in column I with those in
column II and select the correct option given below.

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Lungs are made up of air-filed sacs, the alveoli. The do not collapse even after forceful expiration, because of

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because

The partial pressure of oxygen in the alveoli of the lungs is

Asthma may be attributed to

Name the chronic repiratory disorder caused mainly by cigarette smoking.

Reduction in pH of blood will

When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?

Name the pulmonary disease in which alveolar surface area involved in gas exchage is drastically reduced due to damage in the alveolar walls.

Approximately seventy percent of carbon-dioxide absorbed by the blood will be transported to the lungs

The figure shows a diagrammatic view of human
respiratory system with labels A, B, C and D.
Select the option which gives correct identification
and main function and / or characteristic.

People who have migrated from the planes to an area adjoining Rohtang Pass about six months back

Which one of the following is the correct statement for respiration in humans?

A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This O2

The figure given below shows a small part of
human lung where exchange of gases takes
place. Select the option which represents labelled
part (A, B, C or D) correctly identified along
with its function.

Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as

Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?

Listed below are four respiratory capacities (i \(-\) iv) and four jumbled respiratory volumes of a normal human adult.

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What is true about RBCs in humans?

The haemoglobin of a human foetus

What is vital capacity of our lungs?

Which one of the following statements is incorrect?

The majority of carbon dioxide produced by our body cells is transported to the lungs as

People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at altitude to 5400 metres have around 8 million. This is because at high altitude

When CO2 concentration in blood increases breathing becomes