Take This Amezing Science Form 3

1. The gases that involved during gaseous exchange are :

(u must put 'and' to seperate the answer and must not use 'CAPS LOCK')

During gaseous exchange, the two main gases involved are oxygen and carbon dioxide. Oxygen is inhaled into the lungs and diffuses into the bloodstream, where it binds to hemoglobin in red blood cells and is transported to the body's tissues. Carbon dioxide, on the other hand, is produced as a waste product by cells during cellular respiration. It diffuses from the tissues into the bloodstream and is transported back to the lungs, where it is exhaled. This exchange of gases ensures that oxygen is delivered to the cells for energy production, while carbon dioxide, a waste product, is removed from the body.

Explanation

During gaseous exchange, the two main gases involved are oxygen and carbon dioxide. Oxygen is inhaled into the lungs and diffuses into the bloodstream, where it binds to hemoglobin in red blood cells and is transported to the body's tissues. Carbon dioxide, on the other hand, is produced as a waste product by cells during cellular respiration. It diffuses from the tissues into the bloodstream and is transported back to the lungs, where it is exhaled. This exchange of gases ensures that oxygen is delivered to the cells for energy production, while carbon dioxide, a waste product, is removed from the body.

Submit

2. Which is the correct pathway of Carbon Dioxide out of the lungs?

Trachea ~> bronchus ~> bronchioles ~> alveoli ~> nose

Alveoli ~> bronchus ~> nose ~> trachea ~> bronchioles

Nostril ~> alveoli ~> bronchus ~> bronchioles ~> trachea

Alveoli ~> bronchioles ~> bronchus ~> trachea ~> nose

not-available-via-ai

Explanation

not-available-via-ai

3. What substances that cause smokers to addict?

Tar

Carbon monoxide

Nicotine

Sulphur monoxide

Nicotine is the correct answer because it is a highly addictive substance found in tobacco products. When smokers inhale nicotine, it quickly reaches the brain and stimulates the release of dopamine, a chemical that is associated with pleasure and reward. This creates a pleasurable sensation, making the individual crave more nicotine. Over time, the body becomes dependent on nicotine, leading to addiction. Nicotine addiction is one of the main reasons why smokers find it difficult to quit smoking.

Explanation

Nicotine is the correct answer because it is a highly addictive substance found in tobacco products. When smokers inhale nicotine, it quickly reaches the brain and stimulates the release of dopamine, a chemical that is associated with pleasure and reward. This creates a pleasurable sensation, making the individual crave more nicotine. Over time, the body becomes dependent on nicotine, leading to addiction. Nicotine addiction is one of the main reasons why smokers find it difficult to quit smoking.

4. Which characteristic help gaseous exchange between the alveoli and blood capillaries to take place efficiently?

Thick, moist alveolus walls, covered by a few blood capillaries

Thin, moist alveolus walls, covered by a network of blood capillaries

Thin, dry alveolus walls, covered by a network of blood capillaries

Thick, dry alveolus walls, covered by a few blood capillaries

The correct answer is "Thin, moist alveolus walls, covered by a network of blood capillaries". This characteristic is important for efficient gaseous exchange because it allows for a short diffusion distance between the alveoli and the blood capillaries. The thin walls of the alveoli allow gases to easily diffuse across, while the moisture helps to keep the walls moist and facilitates the movement of gases. The network of blood capillaries ensures a large surface area for exchange and allows for a greater amount of oxygen to be absorbed into the blood and carbon dioxide to be removed.

Explanation

The correct answer is "Thin, moist alveolus walls, covered by a network of blood capillaries". This characteristic is important for efficient gaseous exchange because it allows for a short diffusion distance between the alveoli and the blood capillaries. The thin walls of the alveoli allow gases to easily diffuse across, while the moisture helps to keep the walls moist and facilitates the movement of gases. The network of blood capillaries ensures a large surface area for exchange and allows for a greater amount of oxygen to be absorbed into the blood and carbon dioxide to be removed.