Gr 9 NATUURWETENSKAPPE: HFST 1.4 Gaswisseling in die longe

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What is the function of the bronchi and bronchioles in the lungs?

To facilitate the exchange of gases

To supply oxygen to the blood

To store carbon dioxide

To distribute air throughout the lungs (correct)

Why are alveoli important for gaseous exchange?

Because they contain oxygen-rich air

Because they are surrounded by a dense network of capillaries (correct)

Because they provide a small surface area for gaseous exchange

Because they are Grape-like clusters of air sacs

What happens during inhalation in the lungs?

Carbon dioxide diffuses from the blood into the alveoli

Oxygen diffuses from the blood into the alveoli

Oxygen-rich air is drawn into the alveoli and oxygen diffuses into the blood (correct)

The concentration of oxygen in the alveoli is lower than in 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 Signup and view all the answers

What is the primary function of the lungs?

To facilitate gaseous exchange Signup and view all the answers

What happens to carbon dioxide during exhalation?

It diffuses from the blood into the alveoli and is expelled Signup and view all the answers

What is unique about the walls of the alveoli?

They are one cell thick Signup and view all the answers

What is the primary function of the rich blood supply in the alveoli?

To ensure a constant supply of blood for gas exchange Signup and view all the answers

What is the purpose of the moist surfaces in the alveoli?

To help gases dissolve and diffuse more rapidly Signup and view all the answers

What is the result of efficient gaseous exchange in the body?

Maintenance of the body's homeostasis Signup and view all the answers

What is a health implication of problems with gaseous exchange?

Severe health issues such as asthma Signup and view all the answers

What happens to oxygen during gaseous exchange?

It binds to haemoglobin in red blood cells Signup and view all the answers

What is the function of thin walls in the alveoli and capillaries?

To facilitate easy diffusion of gases Signup and view all the answers

What is the purpose of the large surface area in the alveoli?

To increase the rate of gas exchange Signup and view all the answers

What happens to carbon dioxide during gaseous exchange?

It diffuses from the blood into the alveoli Signup and view all the answers

What is the characteristic of the walls of the alveoli that facilitates gaseous exchange?

Thin walls that are one cell thick Signup and view all the answers

What happens to the oxygen in the alveoli during inhalation?

It diffuses into the blood and binds to hemoglobin Signup and view all the answers

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 Signup and view all the answers

What is the direction of gas diffusion during exhalation?

From the blood into the alveoli Signup and view all the answers

Why do the lungs have a large surface area?

To facilitate the exchange of gases between the alveoli and the blood Signup and view all the answers

What is the result of the close association between the alveoli and capillaries?

Efficient diffusion of gases between the alveoli and the blood Signup and view all the answers

What is the primary mechanism of gas exchange in the lungs?

Diffusion Signup and view all the answers

What is the primary purpose of the large surface area of alveoli?

To facilitate the exchange of gases between the air and blood Signup and view all the answers

What is the result of gaseous exchange in the alveoli?

Oxygen is added to the blood and carbon dioxide is removed Signup and view all the answers

What is a common health implication of problems with gaseous exchange?

Respiratory issues, such as asthma or emphysema Signup and view all the answers

What is necessary for gaseous exchange to occur efficiently in the alveoli?

A high surface area and thin walls Signup and view all the answers

What is the role of haemoglobin in the process of gaseous exchange?

To transport oxygen from the lungs to the body cells Signup and view all the answers

What is the primary function of the capillaries surrounding the alveoli?

To provide a constant supply of blood for gas exchange Signup and view all the answers

What is the significance of moist surfaces in the alveoli?

To facilitate the dissolution and diffusion of gases Signup and view all the answers

What is the role of the alveoli in maintaining homeostasis in the body?

To continuously supply oxygen to body cells and remove carbon dioxide Signup and view all the answers

What is the primary reason why the lungs are soft, pink, and spongy?

To increase the surface area for gaseous exchange Signup and view all the answers

What determines the direction of gas diffusion during gaseous exchange in the lungs?

The concentration gradient of oxygen and carbon dioxide Signup and view all the answers

What is the primary function of the dense network of capillaries surrounding the alveoli?

To facilitate the exchange of oxygen and carbon dioxide Signup and view all the answers

What is the result of inefficient gaseous exchange in the lungs?

The body's cells receive inadequate oxygen supply Signup and view all the answers

What is the primary benefit of the close association between the alveoli and capillaries?

Efficient gas exchange between the alveoli and the blood Signup and view all the answers

What is the primary characteristic of the walls of the alveoli that facilitates gaseous exchange?

Thin and permeable Signup and view all the answers

What is the primary mechanism that allows oxygen to enter the blood during inhalation?

Passive diffusion Signup and view all the answers

What is the primary advantage of the rich blood supply in the alveoli?

To facilitate the rapid exchange of oxygen and carbon dioxide Signup and view all the answers

What is the function of oxyhaemoglobin in the process of gaseous exchange?

To transport oxygen from the alveoli to the body cells Signup and view all the answers

What is the result of the narrowing of airways in asthma?

Impeded airflow to the alveoli Signup and view all the answers

What is the characteristic of the walls of the alveoli that facilitates the diffusion of gases?

Thin and permeable Signup and view all the answers

What is the consequence of a reduction in the surface area for gaseous exchange in the alveoli?

Decreased rate of carbon dioxide removal Signup and view all the answers

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 Signup and view all the answers

What is the consequence of fluid-filled alveoli in pneumonia?

Impaired gas exchange Signup and view all the answers

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 Signup and view all the answers

Gr 9 NATUURWETENSKAPPE: HFST 1.4 Gaswisseling in die longe

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Questions and Answers

What is the function of the bronchi and bronchioles in the lungs?

Why are alveoli important for gaseous exchange?

What happens during inhalation in the lungs?

Which of the following best defines diffusion?

What is the primary function of the lungs?

What happens to carbon dioxide during exhalation?

What is unique about the walls of the alveoli?

What is the primary function of the rich blood supply in the alveoli?

What is the purpose of the moist surfaces in the alveoli?

What is the result of efficient gaseous exchange in the body?

What is a health implication of problems with gaseous exchange?

What happens to oxygen during gaseous exchange?

What is the function of thin walls in the alveoli and capillaries?

What is the purpose of the large surface area in the alveoli?

What happens to carbon dioxide during gaseous exchange?

What is the characteristic of the walls of the alveoli that facilitates gaseous exchange?

What happens to the oxygen in the alveoli during inhalation?

What is the purpose of the dense network of capillaries surrounding the alveoli?

What is the direction of gas diffusion during exhalation?

Why do the lungs have a large surface area?

What is the result of the close association between the alveoli and capillaries?

What is the primary mechanism of gas exchange in the lungs?

What is the primary purpose of the large surface area of alveoli?

What is the result of gaseous exchange in the alveoli?

What is a common health implication of problems with gaseous exchange?

What is necessary for gaseous exchange to occur efficiently in the alveoli?

What is the role of haemoglobin in the process of gaseous exchange?

What is the primary function of the capillaries surrounding the alveoli?

What is the significance of moist surfaces in the alveoli?

What is the role of the alveoli in maintaining homeostasis in the body?

What is the primary reason why the lungs are soft, pink, and spongy?

What determines the direction of gas diffusion during gaseous exchange in the lungs?

What is the primary function of the dense network of capillaries surrounding the alveoli?

What is the result of inefficient gaseous exchange in the lungs?

What is the primary benefit of the close association between the alveoli and capillaries?

What is the primary characteristic of the walls of the alveoli that facilitates gaseous exchange?

What is the primary mechanism that allows oxygen to enter the blood during inhalation?

What is the primary advantage of the rich blood supply in the alveoli?

What is the function of oxyhaemoglobin in the process of gaseous exchange?

What is the result of the narrowing of airways in asthma?

What is the characteristic of the walls of the alveoli that facilitates the diffusion of gases?

What is the consequence of a reduction in the surface area for gaseous exchange in the alveoli?

What is the role of the alveoli in maintaining homeostasis in the body?

What is the consequence of fluid-filled alveoli in pneumonia?

What is the significance of the close association between the alveoli and capillaries?

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