Breathing and E...

Which of the following statements is/are false?

a. When the pressure within the lungs is less than the atmospheric pressure, inspiration occurs.
b. Both the lungs are covered by triple layer of pleura, having pleural fluid between them.
c. Respiratory rhythm centre is responsible for maintaining and moderating the respiratory rhythm in humans.

The conducting part of the respiratory system is the part starting with the external nostrils up to the terminal bronchioles. Which of the following is not a function of the conducting part?

Among other organs, the thoracic chamber protects and holds the heart and lungs. Which of the following form(s) the thoracic chamber ventrally?

Which of the following statements is/are false?

a. The expansion of diaphragm decreases the volume of thoracic chamber in the antero-posterior axis.
b. On an average, 1100 mL to 1200 mL volume of air remains in the lungs even after a forcible expiration.
c. Humans can increase the strength of breathing with the help of additional muscles in the abdomen.

Which of the following statements is/are false?

a. The device that can be used to estimate the volume of air involved in breathing movements is called barometer.
b. Expiration occurs if the intra-pulmonary pressure is higher than the atmospheric pressure.
c. The additional volume of air that a person can inspire by a forcible inspiration is called the inspiratory reserve volume.

Match the following:

Which of the following enzymes helps in transporting nearly 70 percent of carbon dioxide as bicarbonate?

Which of the following can alter the respiratory mechanism?
a. The pneumotaxic centre in the pons region of the brain
b. The chemosensitive area in the medulla
c. The respiratory centre in the medulla

What percentage of oxygen is carried in a dissolved state through the plasma?

Which of the following statements is/are false?
a. Haemoglobin is present in the RBCs as a red-coloured iron-containing pigment.
b. Oxygen plays quite a insignificant role in the regulation of respiratory rhythm.
c. Vital capacity is the total volume of air accommodated in the lungs at the end of a forced inspiration.