45 Questions
What happens to the rib cage during inhalation?
It moves upwards and outwards.
What type of blood is pumped by the heart to the rest of the body?
Blood rich in oxygen
What is the function of the alveoli?
To facilitate gas exchange between the air and blood.
What happens to the diaphragm during inhalation?
It contracts and flattens
During exhalation, what happens to the diaphragm?
It relaxes and becomes dome-shaped again.
What is the role of the heart in the respiratory system?
To pump oxygenated blood to the body and deoxygenated blood to the lungs.
What is the result of the decreased thoracic volume during exhalation?
Air is expelled from the lungs
What happens to the air during inhalation?
It is pulled into the lungs.
What is the function of the intercostal muscles during inhalation?
They contract, expanding the rib cage
What type of blood returns to the heart and is then pumped to the lungs?
Blood carrying carbon dioxide and other wastes
What is the pathway of air during inhalation?
Mouth and nose -> pharynx -> larynx -> trachea.
What is the result of the increased thoracic volume during inhalation?
Air flows in
What is the function of haemoglobin molecules in red blood cells?
To transport oxygen from the lungs to the body.
What happens to the rib cage during exhalation?
It contracts
What is the purpose of the breathing mechanism?
To facilitate gas exchange
What is the result of the increased chest cavity volume during inhalation?
The lungs expand to fill the extra space
What happens to the air in the alveoli during exhalation?
It is pushed out of the alveoli
What is the purpose of the diffusion process in the alveoli?
To facilitate the exchange of oxygen and carbon dioxide
What is the function of the bronchioles in the lungs?
To further branch into tiny air sacs
What is the role of haemoglobin molecules in red blood cells?
To bind to oxygen molecules
What is the result of the increased pressure inside the chest cavity during exhalation?
The lungs are compressed, forcing air out
What is the purpose of the pharynx in the respiratory system?
To allow air to pass from the mouth and nose into the larynx
What is the primary function of the heart in the respiratory system?
To pump oxygen-rich blood to the rest of the body
What happens to the internal pressure during inhalation?
It decreases
What is the direction of air flow during inhalation?
Into the lungs
What is the primary function of the intercostal muscles?
To facilitate breathing
What is the result of the diaphragm relaxing and returning to its dome shape?
Air is pushed out of the lungs
What is the role of the network of blood vessels in the respiratory system?
To transport oxygen-rich blood to the rest of the body
What is the result of the diaphragm contracting and flattening?
Air is pulled into the lungs
What is the type of blood that returns to the heart and is then pumped to the lungs?
Deoxygenated blood
What happens to the volume of the chest cavity during inhalation?
It increases
What is the primary function of the alveoli in the respiratory system?
To facilitate gas exchange between the air and blood
What happens to the carbon dioxide in the blood during exhalation?
It is diffused into the alveoli
What is the role of the bronchi in the respiratory system?
To branch into smaller airways
What happens to the pressure inside the chest cavity during exhalation?
It increases
What is the pathway of air during exhalation?
Lungs → bronchi → trachea → pharynx → mouth and nose
What is the role of haemoglobin molecules in red blood cells?
To bind to oxygen and transport it to the body's tissues
What is the primary function of the heart in relation to oxygenated blood?
To pump oxygenated blood to the rest of the body through a network of blood vessels.
What happens to the internal pressure during exhalation?
It increases, causing air to flow out of the lungs.
What is the result of the intercostal muscles contracting during inhalation?
The rib cage expands, decreasing the internal pressure.
What is the function of the breathing mechanism in the body?
To facilitate gas exchange between the lungs and the environment.
What happens to the diaphragm during exhalation?
It relaxes and returns to its dome shape, pushing air out of the lungs.
What is the result of the increased thoracic volume during inhalation?
Air is pulled into the lungs.
What type of blood is pumped to the lungs for gas exchange?
Deoxygenated blood.
What is the result of the diaphragm contracting and flattening during inhalation?
Air is pulled into the lungs.
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