Respiratory System L2 Inhalation & Exhalation
How does the air pressure change in the lungs during Inhalation?
Pressure in the lungs decreases and that forces air in
What is a cross-section?
a crosswise cut through something
What is the formula for cellular respiration?
C6H12O6 + 6O2 --> 6CO2 + 6H2O + ATP
What are capillaries?
Capillaries are the exchange vessels. They are microscopic and allow substances to pass through quickly.
The sheath of muscle, located beneath the lungs, that contracts & relaxes to facilitate the breathing process is called...
Diaphragm
What happens to the during Exhalation?
Diaphragm relaxes & moves upward
What structure covers the trachea to prevent food from entering the trachea and traveling into the lungs?
Epiglottis
What term refers to getting air out of the body?
Exhalation
What term refers to getting air into the body?
Inhalation
What are the little sacs at the end of the bronchioles ?
Little sacs are alveoil
What is a strength in using models? How can using models be helpful?
Models show some aspect of what you are trying to demonstrate; they can be helpful for us to understand how something works
What happens to the air pressure inside the lungs during exhalation?
Pressure increases which forces air to move out
How do the ribs move during exhalation?
Ribs move downward and inward
During inhalation, how do the ribs move?
Ribs move upward and outward
Why is oxygen important?
So we can combine it with nutrients and convert it into ENERGY
What body part is responsible for having air travel into the body
The diaphragm
During which process, inhalation or exhalation, does the diaphragm contract & move downward?
The diaphragm does this during inhalation, to help take in air.
How is C6H12O6 + 6O2 --> 6CO2 + 6H2O + ATP different from C6H12O6 + O2 --> CO2 + H2O + ATP
The first equation is balanced so on either side of the --> it has the same number of atoms. The 2nd equation is just showing the substances in celllular respiration
What is the tube that connects the pharynx with the lungs called?
Trachea
When does the volume of the chest cavity increase?
Volume does this during Inhalation
How does the volume of the chest cavity change during Exhalation?
Volume of chest cavity decreases
What are the nosehairs that trap pollution, dust, dirt, & other particles from the air as it enters the body as well as help to warm the air called?
cilia
What are the muscles, located between the ribs called?
intercostal muscles
What is the sticky substance in nose that helps trap particles from entering the body called?
mucus
What is the bronchus?
one of the two tubes that connect the lungs with the trachea
What is cellular respiration?
process that releases energy from food in the presence of oxygen
What part is responsible for having oxygen travel into the body & carbon dioxide out of the body
the aveoli
What is the job of the intercostal muscles?
they help expand and shrink the ribs which increases and decreases the size of the chest cavity
What is a weakness of using models?
they may not show EXACTLY how the real thing works; may not look like the real thing, being made from different materials
What are bronchioles?
Airways in the lungs that lead from the bronchi to the alveoli.
Why is carbon dioxide important?
It is the gas that our body creates during cellular respiration and gets rid of with each breath. It is part of gas exchange.
