Quizzzz... Buzz For Grade 7
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About This Quiz
Engage in this intriguing Grade 7 science quiz focused on human respiration. Explore how asthma worsens, the mechanics of inhaling, and the transformation of raw materials during respiration.
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- 2.
Asthma can get worse due to
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Bacteria
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Viruses
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Insects
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Dust
Correct Answer
A. VirusesExplanation
Asthma can get worse due to viruses because viral infections can trigger inflammation in the airways, leading to asthma symptoms. Viruses such as the common cold or the flu can cause respiratory infections that can exacerbate asthma symptoms and make breathing more difficult. This is because the immune response to viral infections can cause the airways to become inflamed and narrow, making it harder for air to flow in and out of the lungs. Therefore, viruses can worsen asthma symptoms and increase the risk of asthma attacks.Rate this question:
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- 3.
When we inhale
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The diaphragm is pushed upwards and the rib cage downwards
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Both diaphragm and rib cage are pushed downwards
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The diaphragm is pulled downwards and the rib cage upwards
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The diaphragm is pushed upwards and the rib cage is pulled downwards
Correct Answer
A. The diaphragm is pulled downwards and the rib cage upwardsExplanation
When we inhale, the diaphragm contracts and moves downward, creating more space in the chest cavity. At the same time, the muscles between the ribs contract, pulling the rib cage upwards and outwards. This combined action of the diaphragm moving downward and the rib cage moving upwards increases the volume of the chest cavity, allowing air to enter the lungs.Rate this question:
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- 4.
In respiration the raw products are
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Oxygen and carbon
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Oxygen and food
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Oxygen and glucose
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Food and carbon
Correct Answer
A. Oxygen and glucoseExplanation
In respiration, the raw products are oxygen and glucose. Oxygen is required for the process of respiration as it acts as the final electron acceptor in the electron transport chain, allowing for the production of ATP. Glucose is the main source of energy for respiration, as it is broken down through a series of metabolic reactions to produce ATP. Therefore, both oxygen and glucose are essential for the process of respiration.Rate this question:
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- 5.
The process of taking oxygen in is known as
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Inhaling
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Respiring
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Exhaling
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Synthesizing
Correct Answer
A. InhalingExplanation
Inhaling refers to the process of taking in oxygen. It involves the intake of air through the nose or mouth, which then travels down the respiratory system into the lungs. Once in the lungs, oxygen is absorbed into the bloodstream and transported to cells throughout the body for various metabolic processes. Therefore, inhaling is the correct term to describe the process of taking in oxygen.Rate this question:
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- 6.
In respiration, raw material is converted into
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Water only
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Carbon dioxide and energy
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Water and energy
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Water, carbon dioxide and energy
Correct Answer
A. Water, carbon dioxide and energyExplanation
During respiration, the raw material (glucose) is broken down in the presence of oxygen to produce energy. This process is called aerobic respiration. As a result of this process, water and carbon dioxide are released as byproducts, along with the energy that is stored in ATP molecules. Therefore, the correct answer is "water, carbon dioxide, and energy."Rate this question:
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- 7.
Cold is caused by
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Bacteria
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Viruses
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Insects
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Dust
Correct Answer
A. VirusesExplanation
Cold is caused by viruses. Bacteria, insects, and dust are not responsible for causing colds. Viruses are the main culprits behind the common cold, as they infect the respiratory system and cause symptoms such as a runny nose, coughing, and sneezing. Viruses can easily spread from person to person through close contact or by touching contaminated surfaces. Therefore, it is important to practice good hygiene, such as washing hands frequently, to prevent the spread of cold viruses.Rate this question:
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- 8.
The process of giving out breath is known as
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Inhaling
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Exhaling
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Respiration
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Evaporation
Correct Answer
A. ExhalingExplanation
Exhaling refers to the process of expelling air from the lungs. When we exhale, the diaphragm and intercostal muscles relax, causing the volume of the thoracic cavity to decrease. This leads to the expulsion of air from the lungs, allowing for the removal of carbon dioxide and waste products from the body. In contrast, inhaling involves the intake of air into the lungs, respiration refers to the overall process of gas exchange in the body, and evaporation is the process of liquid turning into a gas.Rate this question:
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- 9.
Every single cell of the body requires
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Oxygen only
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Food only
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Carbon dioxide and food
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Oxygen and food
Correct Answer
A. Oxygen and foodExplanation
Every single cell of the body requires oxygen and food in order to function properly. Oxygen is necessary for cellular respiration, which is the process that produces energy in the form of ATP. Without oxygen, cells cannot generate enough energy to carry out their functions. Food provides the necessary nutrients, such as carbohydrates, proteins, and fats, that are broken down and used by cells for growth, repair, and energy production. Therefore, both oxygen and food are essential for the survival and proper functioning of every cell in the body.Rate this question:
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- 10.
The carbon dioxide is removed from
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Anus as feces
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Lungs while inhaling
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Lungs while exhaling
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Kidneys
Correct Answer
A. Lungs while exhalingExplanation
When we inhale, we take in oxygen from the air into our lungs. During the process of respiration, oxygen is used by our cells to produce energy, and carbon dioxide is produced as a waste product. This carbon dioxide is then transported back to the lungs through the bloodstream. When we exhale, the carbon dioxide is expelled from the body through the lungs. Therefore, the correct answer is "lungs while exhaling."Rate this question:
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- 11.
Flu is caused by
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Bacteria
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Viruses
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Insects
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Dust
Correct Answer
A. VirusesExplanation
Flu is caused by viruses, specifically the influenza virus. Bacteria, insects, and dust are not responsible for causing the flu.Rate this question:
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- 12.
Hair in nostrils help to
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Inhale easily
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Exhale easily
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Clean air from dust
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Make the air warm
Correct Answer
A. Clean air from dustExplanation
The hair in our nostrils serves as a filter to clean the air we breathe from dust particles. When we inhale, the hair traps dust and other particles, preventing them from entering our respiratory system. This helps to keep our lungs and airways clean and free from irritants.Rate this question:
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- 13.
The main cause of 'asthma' is
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Tobacco smoke
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Pets
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Exercise
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Laughing
Correct Answer
A. Tobacco smokeExplanation
Exposure to tobacco smoke is a major cause of asthma. Inhalation of smoke from cigarettes, cigars, or pipes can irritate and inflame the airways, leading to symptoms such as wheezing, coughing, and shortness of breath. The chemicals present in tobacco smoke can also damage the lining of the airways and make them more sensitive to triggers, making it easier for asthma attacks to occur. It is important for individuals with asthma to avoid exposure to tobacco smoke to manage their symptoms effectively.Rate this question:
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- 14.
The respiration that does not involve the presence of oxygen is known as
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Aerobic respiration
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Anaerobic respiration
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Passive Respiration
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Active respiration
Correct Answer
A. Anaerobic respirationExplanation
Anaerobic respiration is the correct answer because it refers to the type of respiration that occurs in the absence of oxygen. This process is commonly seen in microorganisms and some types of cells in humans and animals. During anaerobic respiration, glucose is broken down to produce energy in the form of ATP without the need for oxygen. This process produces lactic acid or ethanol as a byproduct.Rate this question:
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- 15.
The light-dependent reactions of ______ occur in the thylakoid membranes of chloroplasts, where light energy is converted into chemical energy in the form of ATP and NADpH.
Correct Answer
Photosynthesis, photosynthesisExplanation
Photosynthesis is a complex process that converts light energy into chemical energy in the form of glucose. The light-dependent reactions are the first stage of photosynthesis, where light energy is captured and used to generate ATP and NADPH, which are then used in the light-independent reactions (Calvin cycle) to produce glucose.Rate this question:
- 16.
Air passes into the body through the ____________
Correct Answer
Trachea, WindpipeExplanation
The trachea, also known as the windpipe, is the tube that allows air to pass into the body. It connects the larynx to the bronchi and allows air to flow in and out of the lungs. The trachea is lined with cilia and mucus, which help to filter and moisten the air as it enters the body.Rate this question:
- 17.
Which planet in our solar system is known as the "Red Planet"?
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Venus
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Jupiter
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Mars
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Saturn
Correct Answer
A. MarsExplanation
Mars is often called the "Red Planet" because of its reddish appearance, which is due to iron oxide, or rust, on its surface. This distinct color makes it easily recognizable in the night sky. Mars has been a focus of exploration due to its similarities to Earth, and scientists believe that it might have had liquid water and conditions suitable for life in the distant past. Its unique color and intriguing features make it one of the most studied planets in the solar system.Rate this question:
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- 18.
During respiration, oxygen and glucose reacts together to produce carbon dioxide, water and energy.
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True
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False
Correct Answer
A. TrueExplanation
During respiration, oxygen and glucose undergo a chemical reaction called cellular respiration. This process occurs in the mitochondria of cells and involves the breakdown of glucose molecules to release energy. Oxygen is used as the final electron acceptor, and carbon dioxide and water are produced as byproducts. This reaction is essential for the production of energy in the form of ATP, which is used by cells for various metabolic processes. Therefore, the statement that oxygen and glucose react together to produce carbon dioxide, water, and energy is true.Rate this question:
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- 19.
At the end of each bronchiole is a tiny group of air-sacs called alveoli.
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True
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False
Correct Answer
A. TrueExplanation
The statement is true because at the end of each bronchiole, there are indeed tiny air-sacs called alveoli. These alveoli are responsible for the exchange of oxygen and carbon dioxide between the lungs and the bloodstream. They provide a large surface area for efficient gas exchange, allowing oxygen to enter the bloodstream and carbon dioxide to be removed from the body.Rate this question:
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- 20.
The 'air' that we breath, turns moist, by
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Hair in nostrils
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Blood capillaries in nostrils
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Water in the nose
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Mucus lining in nostrils
Correct Answer
A. Blood capillaries in nostrilsExplanation
The correct answer is blood capillaries in nostrils. When we breathe, the air passes through our nostrils, where it comes into contact with the blood capillaries. These capillaries have a high surface area and are filled with warm blood. As the air passes over them, moisture from the blood evaporates into the air, causing it to become moist. This helps to humidify the air before it reaches the lungs, preventing them from drying out.Rate this question:
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- 21.
In the body, ____________ is immediately below the diaphragm.
Correct Answer
LiverExplanation
The liver is located immediately below the diaphragm. The diaphragm is a large, dome-shaped muscle that separates the chest cavity from the abdominal cavity. The liver is one of the largest organs in the body and is situated in the upper right quadrant of the abdomen, just below the diaphragm. Its position allows it to receive blood from the hepatic artery and portal vein, and it plays a vital role in detoxification, metabolism, and digestion.Rate this question:
- 22.
Glucose+Oxygen--------------------Carbon dioxide+water+energy ( Tissue respiration)
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True
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False
Correct Answer
A. TrueExplanation
The statement is true because during tissue respiration, glucose and oxygen are used by cells to produce carbon dioxide, water, and energy. This process occurs in the mitochondria of cells and is essential for the production of ATP, the energy currency of the cell.Rate this question:
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- 23.
The most dangerous disease of respiratory system is
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Asthma
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Flu
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Cold
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Cough
Correct Answer
A. AsthmaExplanation
Asthma is considered the most dangerous disease of the respiratory system because it is a chronic condition that causes the airways to become inflamed and narrow, making it difficult to breathe. Asthma attacks can be triggered by various factors such as allergens, exercise, or respiratory infections. During an asthma attack, the individual may experience wheezing, shortness of breath, chest tightness, and coughing. If not properly managed, asthma can lead to severe complications and even be life-threatening. Unlike the flu, cold, or cough, asthma is a chronic condition that requires ongoing management and treatment.Rate this question:
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- 24.
The ________________in the air we breathe in is used by the body's cells in the process of respiration
Correct Answer
oxygenExplanation
Oxygen in the air we breathe is used by the body's cells in the process of respiration. Oxygen is essential for the production of energy in the cells through a series of chemical reactions known as cellular respiration. During respiration, oxygen is used to break down glucose and other molecules, releasing energy in the form of ATP. This process occurs in the mitochondria of cells and is vital for the functioning of all living organisms.Rate this question:
- 25.
The respiration that involves the presence of oxygen is known as
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Aerobic respiration
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Anaerobic respiration
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Passive respiration
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Active respiration
Correct Answer
A. Aerobic respirationExplanation
Aerobic respiration is the correct answer because it is the process of respiration that requires the presence of oxygen. During aerobic respiration, glucose is broken down in the presence of oxygen to produce energy in the form of ATP. This process occurs in the mitochondria of cells and is the most efficient way to generate energy. Anaerobic respiration, on the other hand, occurs without oxygen and produces less energy. Passive and active respiration are not accurate terms used to describe respiration processes.Rate this question:
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- 26.
When we exhale
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The diaphragm is pushed up and the rib cage is pushed downwards
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The diaphragm is pulled down and the rib cage is pushed downwards
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The diaphragm is pulled down and the rib cage is pulled upwards
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The diaphragm is pushed upwards and the rib cage is pulled upwards
Correct Answer
A. The diaphragm is pushed up and the rib cage is pushed downwardsExplanation
During exhalation, the diaphragm, which is a dome-shaped muscle located below the lungs, contracts and moves upwards. This upward movement of the diaphragm reduces the space in the chest cavity, causing the rib cage to move downwards. As a result, the volume of the chest cavity decreases, and the air is pushed out of the lungs. Therefore, the correct answer is that the diaphragm is pushed up and the rib cage is pushed downwards during exhalation.Rate this question:
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- 27.
A human body removes most of the water through
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Sweating
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Breathing
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Urination
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Working hard
Correct Answer
A. UrinationExplanation
The correct answer is urination because the human body eliminates a significant amount of water through the process of urination. When we consume fluids, our body absorbs the necessary nutrients and water, and the excess water is filtered by the kidneys. The kidneys produce urine, which is then excreted from the body through the urinary tract. This process helps maintain the body's water balance and eliminates waste products from the bloodstream. Sweating and breathing also contribute to water loss, but urination is the primary method of removing water from the body.Rate this question:
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- 28.
While inhaling, human take __________ of oxygen into the body.
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30%
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21%
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60%
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45%
Correct Answer
A. 21%Explanation
During inhalation, humans take in approximately 21% of oxygen into the body. This is because the Earth's atmosphere is composed of approximately 21% oxygen, with the majority being nitrogen. When we breathe in, oxygen from the air enters our lungs and is then transported to our bloodstream, where it is delivered to our cells for various biological processes such as energy production through respiration.Rate this question:
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- 29.
Each pair of ribs has muscles, called
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Intercostal muscles
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Skeletal muscles
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Brachii muscles
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None of the above
Correct Answer
A. Intercostal musclesExplanation
The correct answer is intercostal muscles. Each pair of ribs has these muscles, which are responsible for the movement of the ribcage during breathing. The intercostal muscles play a crucial role in expanding and contracting the chest cavity, allowing for the inhalation and exhalation of air. They are located between the ribs and are classified as skeletal muscles, which means they are under voluntary control.Rate this question:
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Current Version
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Jan 20, 2025Quiz Edited by
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Jul 07, 2020Quiz Created by
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