Breathing and exchange of gases practice · Mixed difficulty

Which structure of man is similar to spiracle of cockroach?

Because of the relatively high altitude of Antonito, Colorado, the town has a normal barometric pressure of about $600 {~mm} {Hg}$ rather than $760 {~mm} {Hg}$ as at sea level. The partial pressure of oxygen in Antonito's air is approximately:

The partial pressure of oxygen in the alveolar air is

Which one respires through gills?

Hamburger's phenomenon is also known as

Club-shaped cartilage of larynx is

Respiratory rhythm centre is located in

The breakdown product of haemoglobin is called as

The type of respiration found in most of the aquatic arthropods and molluscs is

Bicarbonates formed inside erythrocytes passes out into plasma while chloride of plasma pass into erythrocytes. The phenomenon is called

Read the following statements carefully w.r.t. humans.
(a) Inspiratory capacity of a healthy adult human is about six to seven times to his tidal volume.
(b) Simple diffusion of respiratory gases through diffusion membrane is mainly based on solubility of gases but not on pressure gradients.
(c) Pressure contributed by gases in a gaseous mixture is called partial pressure of gases.
(d) The role of $\mathrm{O}_2$ in the regulation of respiratory rhythm is quite insignificant.
Choose the option with only correct statements.

Assertion (A) Bohr’s effect occurs at the level of alveoli of
lungs
Reason (R) It occurs when high concentration of $C{O_2}$
decreases the affinity of haemoglobin to oxygen.

Almost same $\rho C{O_2}$ in humans is found in

We already know that mechanism of breathing vary among different groups of animals depending mainly on their habitats and level of organisation. Then read the above statement carefully and choose correct mode of respiration from below :
(A) Branchial respiration
(B) Pulmonary respiration
(C) Cutaneous respiration

Leftward shift of oxyhaemoglobin curve is noticed under

Skin is an accessory organ of respiration

Mark the incorrect option w.r.t respiratory capacities

Pleural membrane is covering of

Partial pressure of ${O_2}$ and $C{O_2}$ in atmospheric airs compared to those in alveolar air is

Lungs in addition to the respiratory function also help in

Select the correct match w.r.t animals and their respiratory structures.

Blood is a medium to transport ${\mathrm{O}_2}$ and $\mathrm{C}{\mathrm{O}_2}$. About …A… per cent of ${\mathrm{O}_2}$ is transported by …B… in the blood and the remaining …C… per cent of ${\mathrm{O}_2}$ is carried in a dissolved state through the …D…
Select the right options for A, B, C and D to the complete the given statement

Which substances are activate the rhythm centre

Name the disease which occurs due to inflammation of bronchi and bronchioles in which breathing becomes difficult and leads to wheezing

Choose the odd one w.r.t. formation of oxyhaemoglobin.

Which fact suggests that most oxygen is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?

Which of the following increases the rate of gas exchange across the respiratory membrane

Which of the following pair is correctly matched?

Expiration during quiet breathing

Patients with chronic lung disease and difficulty breathing often adapt to the high concentration of ${CO}_2$ in their blood. The breathing centres stop responding to ${CO}_2$ level. If such a patient has difficulty in breathing, medical personnel are reluctant to give the patient pure oxygen. Based on what you know about control of breathing, why do you think this is the case?