Pick the correct statement.

Name the important parts involved in creating a pressure gradient between the lungs and the atmosphere during normal respiration.

Define the following terms:
$(1)$ Inspiration
$(2)$ Expiration

Additional muscles in the ...... impact the ability of humans to increase the strength of inspiration and expiration. Complete the given $NCERT$ statement with an appropriate option.

Breathing rate is lowered during eating because

Given below are events occurring during inspiration. Select the correct order of sequence from the options given below.
$(I)$ Air from atmosphere rushes into lungs.
$(II)$ Thoracic volume increases.
$(III)$ Intercostal muscles contract and ribs along with sternum move upward and outward.
$(IV)$ Diaphragm becomes flat and goes downwards.