PATHOLOGY

PATHOLOGY MCQ

RESPIRATORY SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The large muscle that contracts and relaxes and moves air in and out of the lungs.
A
trachea
B
alveoli
C
diaphragm
D
nose
Explanation: 

Detailed explanation-1: -The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.

Detailed explanation-2: -The diaphragm (DYE-uh-fram) is a muscle between the chest and the abdomen that allows the body to move air in and out of the respiratory system.

Detailed explanation-3: -The diaphragm: This dome-shaped muscle below your lungs separates the chest cavity from the abdominal cavity. The diaphragm is the main muscle used for breathing. The muscles between your ribs: Called intercostal muscles, these muscles play a role in breathing during physical activity.

Detailed explanation-4: -The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

There is 1 question to complete.