Flashcards
1 of 8
The Breathing System | Definitions
Deck complete
You’ve reviewed 8 terms. Keep up the good work!
tap to flip
Print
The Breathing System | Definitions
Diffusion
The movement of liquid or gas molecules from an area of high concentration to an area of lower concentration.
Asthma
Breathing disorder triggered by allergens. Bronchioles become narrower and this is treated by drugs called bronchodilators.
Gaseous Exchange
The transfer of gases between an organism and its external environment.
Inhalation
Intercostal muscles and diaphragm contract, the chest cavity volume increases, air pressure drops in the chest cavity and air moves into the lungs.
Exhalation
Intercostal muscles and diaphragm relax, the chest cavity volume decreases, air pressure increases in the chest cavity and air moves out of the lungs.
Alveoli
Tiny, spherical air sacs in the lungs that are the site of gaseous exchange.
Carbon Dioxide as a Controlling Factor of Human Breathing
The medulla oblongota in the brain controls breathing rate by monitoring the levels of CO2 in the blood.
Effect of Exercise on Breathing
Exercise increases the rate and the depth of breathing as more O2 is required in our skeletal muscles.
Cut dotted horizontal lines. Fold vertical line.
Diffusion
The movement of liquid or gas molecules from an area of high concentration to an area of lower concentration.
Asthma
Breathing disorder triggered by allergens. Bronchioles become narrower and this is treated by drugs called bronchodilators.
Gaseous Exchange
The transfer of gases between an organism and its external environment.
Inhalation
Intercostal muscles and diaphragm contract, the chest cavity volume increases, air pressure drops in the chest cavity and air moves into the lungs.
Exhalation
Intercostal muscles and diaphragm relax, the chest cavity volume decreases, air pressure increases in the chest cavity and air moves out of the lungs.
Alveoli
Tiny, spherical air sacs in the lungs that are the site of gaseous exchange.
Carbon Dioxide as a Controlling Factor of Human Breathing
The medulla oblongota in the brain controls breathing rate by monitoring the levels of CO2 in the blood.
Effect of Exercise on Breathing
Exercise increases the rate and the depth of breathing as more O2 is required in our skeletal muscles.