Breathing and exchange of gases practice · Mixed difficulty

Read the following statement regarding human respiratory system.

Trachea is a straight tube extending up to the midthoracic cavity, which divides at the level of
$\underline{(A)}$ vertebra into a right and left $\underline{(B)}$

Choose the option that correctly fill the blanks $A$ and $B$

Intercostal muscles occur in

Between breaths, the intra pleural pressure is approximately ........... $\mathrm{mm} \mathrm{Hg}$ less than atmospheric pressure

Arrange the following in the order of increasing volume
I.Tidal volume
II.Residual volume
III.Expiratory reserve volume
IV.Vital capacity

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

A person comes to a chest physician with a complain of difficulty in breathing mainly during expiration. On further investigation he is found to have a long history of smoking. Which disease he is likely to suffer?

Serious lung damage accompanying fibrosis in upper part of lungs is seen in people suffering from

Mechanism of breathing vary among different group of animals depending mainly on the
A) Habits B) Habitats
C) Levels of organization D) Demand of situation

Which of the following changes usually tends to occur in plain dwellers when they move to the high altitudes?
I. Increased breathing rate
II. Increased RBC production
III. Increased WBC production
IV. Increased thrombocyte count
Choose the correct option

Lungs have a large number of narrow tubes called

Which of the following can respire anaerobically in human body?

The olfactory epithelium responsible for the sense of smell is located in the

Assertion : Symptoms of emphysema develops when a person living on plains ascends and stays on a mountain.

Reason : Air pressure and partial pressure of oxygen falls with the rise in altitude.

In humans, the contraction of which of the following muscle causes an increase in the volume of thoracic chamber in dorso-ventral axis?

What is vital capacity of our lungs ?

Complete the analogy. Pneumonia : Alveoli : : Common cold : ______

The primary bronchi divide to form

Which is a incorrect point in the following?

Which of the following statement is true regarding the human respiratory system?

Assertion : In mammals, complex respiratory
system has developed.

Reason : Mammalian skin is impermeable to
gases.

Given that tidal volume is $600 \mathrm{ml}$, inspiratory reserve volume is $2500 \mathrm{ml}$, and expiratory reserve volume is $800 \mathrm{ml}$, what is the value of vital capacity of lung?

I. Increased partial pressure of ${O_2}$
II. Increased partial pressure of $C{O_2}$
III. Increased partial pressure of ${H^ + }$
IV. Decreased partial pressure of ${O_2}$
All the above situations favours the dissociation of oxyhaemoglobin except

Identify the type of pulmonary volume/capacity on the basis of quantity of air present in the lungs given below. (Refer NCERT) I. $\sim$ 1100 mL – 1200 mL   II. $\sim$ 500 mL  III. $\sim$ 5000 mL – 6000 mL, Choose the correct option

Complete the analogy by selecting the correct option
Cutaneous respiration : Earthworm : : Pulmonary respiration :______

The percent concentration of carbondioxide in the alveolar air is:

Which of the following feature is common in the alveoli of lungs and villi of mammals?

A molecule of air enters the nose through the external nostrils which of the following is the correct pathway to the trachea?

Identify the component of respiratory system which displays the features given below and choose the correct option
I. Double layered
II. Fluid contained in it reduces the friction on the lung surface
III. Its outer layer is in contact with thoracic wall
IV. Its inner layer is in contact with lungs

Which of the following is not correct about pleural fluid?

Assertion: Fishes use tracheal tubes for respiration
Reason: Fishes are amphibian