MICROANATOMY

ENDOCRINE ORGANS AND RESPIRATORY SYSTEM

RESPIRATORY SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
which inspiration steps are in the correct order
A
air forced in, diaphragm relaxes, air pressure raises
B
diaphragm contracts, air pressure lowers, air forced in
C
air pressure raises, air forced out, diaphragm contracts
D
diaphragm relaxes, air pressure drops, air forced in
Explanation: 

Detailed explanation-1: -Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.

Detailed explanation-2: -Final answer: The correct sequence of the passage of air during inspiration is Pharynx → Larynx → Trachea → Bronchi → Alveoli.

Detailed explanation-3: -The sequence of air passage during inhalation is as follows: Nostrils→pharynx→larynx→trachea→alveoli.

Detailed explanation-4: -Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)

Detailed explanation-5: -During inspiration, the diaphragm and intercostal muscles contract allowing air to enter the lungs. During expiration, the inspiration muscles relax forcing gases to flow out of the lungs.

There is 1 question to complete.