45 Questions
What is the function of the alveoli in the lungs?
To facilitate the exchange of gases
What is the main factor that allows for efficient diffusion of gases between the alveoli and the blood?
The close association of alveoli and capillaries
What is the process of diffusion in the lungs?
The movement of particles from an area of high concentration to an area of low concentration
What happens to oxygen during inhalation in the lungs?
It is diffused from the alveoli into the blood
What is the purpose of the bronchi and bronchioles in the lungs?
To distribute air throughout the lungs
What happens to carbon dioxide during exhalation in the lungs?
It is diffused from the blood into the alveoli
What is the main advantage of having a large surface area in alveoli?
To facilitate the diffusion of gases
What is the function of haemoglobin in red blood cells during gaseous exchange?
To bind to oxygen, forming oxyhaemoglobin
What is the characteristic of the walls of the alveoli?
They are one cell thick
What is the result of efficient gaseous exchange?
The maintenance of homeostasis in the body
What is a consequence of damage to alveoli?
A decrease in the surface area for gas exchange
What is the term for the narrowing of airways, impeding airflow to the alveoli?
Asthma
Where does oxygen from the air diffuse into during gaseous exchange?
The red blood cells in the capillaries
What is the term for the infection leading to fluid-filled alveoli, impairing gas exchange?
Pneumonia
Why is it essential to maintain efficient gaseous exchange?
To ensure the delivery of oxygen to cells and the removal of carbon dioxide
What is the primary function of the moist surfaces of alveoli?
To help gases dissolve and diffuse more rapidly
What is the significance of the rich blood supply surrounding the alveoli?
To ensure a constant supply of blood for gas exchange
What is the primary consequence of asthma on gaseous exchange?
Impeded airflow to the alveoli
What is the primary role of oxyhaemoglobin in the gaseous exchange process?
To transport oxygen from the lungs to the body cells
What is the primary cause of impaired gaseous exchange in emphysema?
Damage to the alveoli, reducing the surface area for gas exchange
What is the significance of efficient gaseous exchange for the body?
To ensure the continuous supply of oxygen to body cells and removal of carbon dioxide
What is the term for the process by which oxygen is taken up and carbon dioxide is removed during gaseous exchange?
Gaseous exchange
What is the primary effect of pneumonia on gaseous exchange?
Impaired gas exchange due to fluid-filled alveoli
What is the shape of the clusters of air sacs that provide a large surface area for gaseous exchange?
Grape-like
During which process does oxygen diffuse from the alveoli into the blood?
Inhalation
What is the direction of movement of particles during diffusion in the lungs?
From high concentration to low concentration
What is the result of the diffusion of carbon dioxide during exhalation?
Carbon dioxide is expelled during exhalation
What is the purpose of the dense network of capillaries surrounding the alveoli?
To facilitate efficient diffusion of gases
What is the term for the movement of oxygen from an area of high concentration to an area of low concentration during inhalation?
Diffusion
What is the characteristic of the lungs that allows them to adapt to their function of gaseous exchange?
They are soft, pink, and spongy
What is the primary reason for the adaptability of the lungs to optimize gaseous exchange?
Increase in surface area for diffusion
What is the effect of the thin walls of the alveoli on the diffusion of gases?
It allows for rapid diffusion of gases
During which stage of the breathing process is the concentration of oxygen higher in the alveoli than in the blood?
Inhalation
What is the direction of movement of carbon dioxide during exhalation?
From the blood to the alveoli
What is the significance of the bronchi and bronchioles in the lungs?
They distribute air throughout the lungs
What is the primary function of the alveoli in the lungs?
To facilitate the exchange of gases
What is the relationship between the concentration of oxygen in the alveoli and the blood during inhalation?
The concentration of oxygen is lower in the blood
Which of the following is a consequence of having a large surface area in the alveoli?
Increased diffusion of oxygen into the blood
What is the primary role of the capillaries surrounding the alveoli?
To facilitate the exchange of gases between the alveoli and the blood
What is the primary effect of pneumonia on gaseous exchange?
Impaired diffusion of gases due to fluid-filled alveoli
What is the primary function of oxyhaemoglobin in the gaseous exchange process?
To bind to oxygen in the alveoli and transport it to the body cells
What is the primary consequence of emphysema on gaseous exchange?
Reduced surface area for gas exchange due to damaged alveoli
What is the primary role of the moist surfaces of the alveoli?
To help dissolve and diffuse gases more rapidly
What is the primary consequence of asthma on gaseous exchange?
Impaired airflow to the alveoli due to inflammation and narrowing of airways
What is the primary significance of efficient gaseous exchange for the body?
To ensure a continuous supply of oxygen to body cells and removal of carbon dioxide
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