Answer:
Option 2
Explanation:
I have answered a question like this before and got it right. lol.
Answer:
The fact of using a paper bag when going through hyperventilation is a widely known situation, the reason why this can have beneficial effects upon the one who practices it is because the objective is to re-breathe the air that goes in the bag because this air that was already in your lungs has a higher concentration of cardone dioxide and helps the body feel better in an easier, calmer and controled way.
The second line of defence is a group of cells, tissues and organs that work together to protect the body. This is the immune system.
When a pathogen (disease-causing organism) invades the body, the neutrophils gather at the entry site and try to engulf it and destroy it.
A T helper cell will recognise only one pathogen. If the T helper cell recognises the invader, it will immediately clone to increase numbers.
After a few days of fighting off the pathogen, you will recover from your infection.
Answer:
The valves actually make things a lot more comfortable because they make the mask a lot more breathable
Explanation: