NEET BIOLOGY

Detailed explanation-1: -Inspiration is the process by which fresh atmospheric air enters into the alveoli of the lungs, it is an active process and is brought about by the activity of inspiratory muscles.

Detailed explanation-2: -Inspiration. Inspiration (inhalation) is the process of taking air into the lungs. It is the active phase of ventilation because it is the result of muscle contraction.

Detailed explanation-3: -Inspiration is an active process. This is because contraction of the diaphragm, and intercostal muscles will increase the volume of the thoracic cavity, and decreasing the pressure of the lungs. This will force air into the lungs as the atmospheric pressure will be higher than the pressure inside the lungs.

Detailed explanation-4: -Inspiration occurs via active contraction of muscles – such as the diaphragm – whereas expiration tends to be passive, unless it is forced.

Detailed explanation-5: -The first phase is called inspiration, or inhaling. When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside.