Breathing and exchange of gases practice · Mixed difficulty

In expiration, diaphragm becomes

Statement-I: In women and children the vocal cords are usually short and hence voice is high pitched.
Statement-II: In men, the vocal cords are thicker and longer hence low pitched.

Respiratory organ of insects are

Read the given statements and select the correct option

Statement 1: Respiration is most efficient in the insect, among the invertebrates.

Statement 2: In the insects, air is carried directly to the cells by tracheoles

Mark the correct statement.

(a) Alveoli are thin, irregular walled and vascularised bag like structures.

(b) Inner pleural membrane is in contact with the thoracic lining.

(c) Larynx is a cartilaginous box.

Which of the following parts are involved in the mechanism of breathing?

To balance the bicarbonate ion loss in RBC, the chloride ions move into RBC; it is known as

Every 100 ml deoxygenated blood delivers around - $\;C{O_2}$ to alveoli -

The volume of air that remains in lungs even after forcible expiration, equals to

Read the given statement and fill in the blanks
Blood is the medium for transport of gases. About ---- A ---- % of $C{O_2}$ is transported in dissolved from through plasma while around ---- B ----- % is transported through RBC

Movement of the air into and out of the lungs is carried out by

Assertion – in insects direct respiration is occur.
Reason : Tracheal tubes exchange ${O_2}/C{O_2}$ directly with the haemocoel which then exchange with tissues

The alveolar ventilation rate in a healthy person is about 4200 ml/min and tidal volume is 500 mL calculate the amount of dead air space, if breathing rate is12 per min.

Dead space air in man is

The total thickness of the diffusion membrane of alveolus capillary is

Statement-I: When pH of blood increase then oxygen dissociation cure shifts towards right side.

Statement-II: Due to high pH affinity of ${O}_2$ with Hb decrease.

The amount of air that moves in and out of the lungs, with each normal inspiration and expiration is called

Assertion: The passage starting with the external nostrils upto the terminal bronchiole constitute the respiratory part.
Reason: The respiratory part transport the air to the alveoli, clears it from the foreign material, humidified and brings the air to body temperature.

How many of the following conditions given in the box favour formation of oxyhaemoglobin?

How many of the following are associated with the harmful effect of smoking? Bronchitis, Emphysema, Coronary heart disease, Cancer of lung, Cancer of urinary bladder, Gastric ulcer

The structure which prevents the entry of food into respiratory tract is

If a healthy adult man inspires or expires 9000 mL of air per minute, then what will be his breathing rate per minute assuming his tidal volume remains normal?

Chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased

Total lung capacity is

If the level of carboxyhaemoglobin in blood reaches upto……, the functioning of central nervous system is severely affected which results in death.

The solubility of ${\mathrm{C}{\mathrm{O}_2}}$ in the blood is

The inhibitory process of respiratory centre in brain that regulates the extent of inspiration is known as

Read the following statements and choose the option having incorrect statements only.
A) Trachea divides at the level of 5th thoracic vertebra into a right and left primary bronchi.
B) Initial bronchioles are supported by complete cartilaginous rings.
C) Each terminal bronchiole gives rise to a number of very thin, irregular walled and vascularised bag-like structures called bronchi.
D) Larynx is a cartilaginous box which helps in sound production and hence called the sound box.

The breathing centre initiates the ventilation in response to

Why do human beings face difficulty to breath in high elevations?