45 Questions
What is the function of the bronchi and bronchioles in the lungs?
To distribute air throughout the lungs
Why are alveoli important for gaseous exchange?
Because they are surrounded by a dense network of capillaries
What happens during inhalation in the lungs?
Oxygen-rich air is drawn into the alveoli and oxygen diffuses into the blood
Which of the following best defines diffusion?
The movement of particles from an area of high concentration to an area of low concentration
What is the primary function of the lungs?
To facilitate gaseous exchange
What happens to carbon dioxide during exhalation?
It diffuses from the blood into the alveoli and is expelled
What is unique about the walls of the alveoli?
They are one cell thick
What is the primary function of the rich blood supply in the alveoli?
To ensure a constant supply of blood for gas exchange
What is the purpose of the moist surfaces in the alveoli?
To help gases dissolve and diffuse more rapidly
What is the result of efficient gaseous exchange in the body?
Maintenance of the body's homeostasis
What is a health implication of problems with gaseous exchange?
Severe health issues such as asthma
What happens to oxygen during gaseous exchange?
It binds to haemoglobin in red blood cells
What is the function of thin walls in the alveoli and capillaries?
To facilitate easy diffusion of gases
What is the purpose of the large surface area in the alveoli?
To increase the rate of gas exchange
What happens to carbon dioxide during gaseous exchange?
It diffuses from the blood into the alveoli
What is the characteristic of the walls of the alveoli that facilitates gaseous exchange?
Thin walls that are one cell thick
What happens to the oxygen in the alveoli during inhalation?
It diffuses into the blood and binds to hemoglobin
What is the purpose of the dense network of capillaries surrounding the alveoli?
To facilitate the exchange of gases between the alveoli and the blood
What is the direction of gas diffusion during exhalation?
From the blood into the alveoli
Why do the lungs have a large surface area?
To facilitate the exchange of gases between the alveoli and the blood
What is the result of the close association between the alveoli and capillaries?
Efficient diffusion of gases between the alveoli and the blood
What is the primary mechanism of gas exchange in the lungs?
Diffusion
What is the primary purpose of the large surface area of alveoli?
To facilitate the exchange of gases between the air and blood
What is the result of gaseous exchange in the alveoli?
Oxygen is added to the blood and carbon dioxide is removed
What is a common health implication of problems with gaseous exchange?
Respiratory issues, such as asthma or emphysema
What is necessary for gaseous exchange to occur efficiently in the alveoli?
A high surface area and thin walls
What is the role of haemoglobin in the process of gaseous exchange?
To transport oxygen from the lungs to the body cells
What is the primary function of the capillaries surrounding the alveoli?
To provide a constant supply of blood for gas exchange
What is the significance of moist surfaces in the alveoli?
To facilitate the dissolution and diffusion of gases
What is the role of the alveoli in maintaining homeostasis in the body?
To continuously supply oxygen to body cells and remove carbon dioxide
What is the primary reason why the lungs are soft, pink, and spongy?
To increase the surface area for gaseous exchange
What determines the direction of gas diffusion during gaseous exchange in the lungs?
The concentration gradient of oxygen and carbon dioxide
What is the primary function of the dense network of capillaries surrounding the alveoli?
To facilitate the exchange of oxygen and carbon dioxide
What is the result of inefficient gaseous exchange in the lungs?
The body's cells receive inadequate oxygen supply
What is the primary benefit of the close association between the alveoli and capillaries?
Efficient gas exchange between the alveoli and the blood
What is the primary characteristic of the walls of the alveoli that facilitates gaseous exchange?
Thin and permeable
What is the primary mechanism that allows oxygen to enter the blood during inhalation?
Passive diffusion
What is the primary advantage of the rich blood supply in the alveoli?
To facilitate the rapid exchange of oxygen and carbon dioxide
What is the function of oxyhaemoglobin in the process of gaseous exchange?
To transport oxygen from the alveoli to the body cells
What is the result of the narrowing of airways in asthma?
Impeded airflow to the alveoli
What is the characteristic of the walls of the alveoli that facilitates the diffusion of gases?
Thin and permeable
What is the consequence of a reduction in the surface area for gaseous exchange in the alveoli?
Decreased rate of carbon dioxide removal
What is the role of the alveoli in maintaining homeostasis in the body?
To ensure the continuous supply of oxygen and removal of carbon dioxide
What is the consequence of fluid-filled alveoli in pneumonia?
Impaired gas exchange
What is the significance of the close association between the alveoli and capillaries?
It allows for the exchange of oxygen and carbon dioxide between the alveoli and capillaries
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