Form 3 Science: Human Respiratory System Quiz

1. What is the respiratory system made up of?

Kidneys, bladder, urethra, ureters

Brain, spinal cord, nerves, neurons

Heart, liver, intestines, stomach

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The respiratory system is made up of the nose, trachea, lungs, and diaphragm. These organs work together to facilitate breathing and the exchange of gases in the body.

Explanation

The respiratory system is made up of the nose, trachea, lungs, and diaphragm. These organs work together to facilitate breathing and the exchange of gases in the body.

2. How is oxygen transported in the body?

- Oxygen is absorbed through the skin and directly enters the bloodstream.

- Oxygen is primarily carried through the body via the nervous system.

- Oxygen is transported through the lymphatic system from the lungs to various organs.

The correct answer explains the process of oxygen transport through the lungs, blood capillaries, and red blood cells. The incorrect answers provide inaccurate information about the transportation of oxygen in the body.

Explanation

The correct answer explains the process of oxygen transport through the lungs, blood capillaries, and red blood cells. The incorrect answers provide inaccurate information about the transportation of oxygen in the body.

3. What harmful substance is present in car exhaust?

Contain: oxygen - improves air quality

Contain: water vapor - reduces environmental impact

Contain: carbon monoxide-reduce oxy. in blood

Contain: nitrogen - enhances engine performance

Car exhaust contains carbon monoxide which can reduce the oxygen levels in the blood when inhaled, leading to health issues.

Explanation

Car exhaust contains carbon monoxide which can reduce the oxygen levels in the blood when inhaled, leading to health issues.

4. What are some common diseases that affect the respiratory system?

Obesity has no impact on the respiratory system

Heart diseases can affect the respiratory system

Diabetes can affect the respiratory system

The correct answer includes examples of diseases caused by bacteria, viruses, and asbestos dust that affect the respiratory system, while the incorrect answers do not directly relate to respiratory system diseases.

Explanation

The correct answer includes examples of diseases caused by bacteria, viruses, and asbestos dust that affect the respiratory system, while the incorrect answers do not directly relate to respiratory system diseases.

5. What are effective ways to improve air quality?

E)cutting down more trees

F)releasing more industrial pollutants

D)burning more fossil fuels

The correct ways to improve air quality involve reducing harmful emissions and pollutants, not increasing them.

Explanation

The correct ways to improve air quality involve reducing harmful emissions and pollutants, not increasing them.

6. What punctuation mark denotes the end of a sentence?

?

-

!

,

In English grammar, a period (.) is commonly used to indicate the end of a declarative sentence.

Explanation

In English grammar, a period (.) is commonly used to indicate the end of a declarative sentence.

7. How does the breathing mechanism work?

During inhalation, the thoracic cavity contracts, increasing air pressure in the lungs and forcing air out of the lungs.

During breathing, the diaphragm contracts during exhalation and relaxes during inhalation.

During inhalation, the thoracic cavity expands to create negative pressure, allowing air to be drawn into the lungs. During exhalation, the thoracic cavity contracts, increasing pressure in the lungs to push air out. The movement of the diaphragm plays a crucial role in creating the pressure differences needed for breathing.

Explanation

During inhalation, the thoracic cavity expands to create negative pressure, allowing air to be drawn into the lungs. During exhalation, the thoracic cavity contracts, increasing pressure in the lungs to push air out. The movement of the diaphragm plays a crucial role in creating the pressure differences needed for breathing.

8. What are the effects of harmful substances found in cigarette smoke?

C) Reduced risk of respiratory diseases.

A) Increased lung capacity.

B) Improved cardiovascular health.

Cigarette smoke contains harmful substances like tar, nicotine, and carbon monoxide that have negative effects on the body, such as increasing the risk of lung cancer, causing addiction, and reducing oxygen levels in the blood.

Explanation

Cigarette smoke contains harmful substances like tar, nicotine, and carbon monoxide that have negative effects on the body, such as increasing the risk of lung cancer, causing addiction, and reducing oxygen levels in the blood.

9. What pollutants are commonly emitted by industry and vehicles?

Contain:lead-impair neurological developmentvolatile organic compounds-contribute to smogmercury-affects brain function

Contain:carbon monoxide-increases risk of heart diseaseozone-decrease lung functionparticulate matter-cause respiratory issues

Contain:chlorofluorocarbons-deplete ozone layermethane-contributes to global warmingammonia-pollutes water sources

Various pollutants are emitted by industry and vehicles, including sulphur dioxide which can damage lung tissues, hydrocarbons that are carcinogenic, and nitrogen oxide which interacts with hydrocarbons to form haze. Other pollutants like carbon monoxide, ozone, lead, volatile organic compounds, mercury, chlorofluorocarbons, methane, and ammonia also have detrimental effects on human health and the environment.

Explanation

Various pollutants are emitted by industry and vehicles, including sulphur dioxide which can damage lung tissues, hydrocarbons that are carcinogenic, and nitrogen oxide which interacts with hydrocarbons to form haze. Other pollutants like carbon monoxide, ozone, lead, volatile organic compounds, mercury, chlorofluorocarbons, methane, and ammonia also have detrimental effects on human health and the environment.