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Questions and Answers
What is the smallest structural and functional unit of an organism?
What is the smallest structural and functional unit of an organism?
A cell
What process is responsible for breaking down food in the cell to release energy?
What process is responsible for breaking down food in the cell to release energy?
Cellular respiration
What are the two main types of cellular respiration?
What are the two main types of cellular respiration?
The breakdown of glucose with the use of oxygen, is called ______ respiration.
The breakdown of glucose with the use of oxygen, is called ______ respiration.
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What are produced as a byproduct of anaerobic respiration in muscle cells?
What are produced as a byproduct of anaerobic respiration in muscle cells?
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What is the term for the number of times a person breathes in a minute?
What is the term for the number of times a person breathes in a minute?
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Breathing is a continuous process that occurs throughout the life of an organism.
Breathing is a continuous process that occurs throughout the life of an organism.
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During inhalation, the diaphragm moves up and the ribs move down.
During inhalation, the diaphragm moves up and the ribs move down.
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During exhalation, the diaphragm relaxes and moves up, while the ribs move down and inwards.
During exhalation, the diaphragm relaxes and moves up, while the ribs move down and inwards.
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What are the tiny pores called that are found on the surface of leaves and are responsible for gas exchange?
What are the tiny pores called that are found on the surface of leaves and are responsible for gas exchange?
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What are the air tubes that carry oxygen throughout the body of insects called?
What are the air tubes that carry oxygen throughout the body of insects called?
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What is the function of the gills in fish?
What is the function of the gills in fish?
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Earthworms breathe through their lungs.
Earthworms breathe through their lungs.
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Why do mountaineers carry oxygen with them?
Why do mountaineers carry oxygen with them?
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What do you inhale when you breathe?
What do you inhale when you breathe?
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Organisms need to breathe in order to survive.
Organisms need to breathe in order to survive.
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During physical activity, your breathing rate decreases.
During physical activity, your breathing rate decreases.
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What is the name of the process where energy is released from food within the cell?
What is the name of the process where energy is released from food within the cell?
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Breathing is the process of breathing in air rich in oxygen and releasing air rich in carbon dioxide.
Breathing is the process of breathing in air rich in oxygen and releasing air rich in carbon dioxide.
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Study Notes
Respiration in Organisms
- Respiration is the breakdown of food in cells, releasing energy
- All living organisms respire to get energy for life processes
- Breathing is a part of respiration, where air is inhaled and exhaled, transporting oxygen to cells
- Oxygen is needed for the breakdown of food in cells
- Cellular respiration is the breakdown of food in cells with oxygen, releasing energy
- Aerobic respiration: breakdown of food using oxygen, producing carbon dioxide and water, releasing energy
- Anaerobic respiration: breakdown of food without oxygen, producing lactic acid or alcohol, releasing energy
Why Organisms Respire?
- All organisms are composed of small units called cells
- Cells need energy to perform functions like nutrition, transport, excretion, and reproduction
- Respiration provides the energy required by cells
Aerobic Respiration
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In aerobic respiration glucose is broken down into carbon dioxide and water using oxygen, and energy is released
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A chemical equation for the process: Glucose + Oxygen → Carbon dioxide + water + Energy
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Organisms need oxygen to carry out aerobic respiration
Anaerobic Respiration
- Organisms can also break down glucose without oxygen, this is called anaerobic respiration
- Anaerobic respiration produces either lactic acid or alcohol and carbon dioxide; and releases energy
- Organisms like yeast use anaerobic respiration to produce alcohol and carbon dioxide
Breathing
- Inhalation: taking air into the lungs, enriching them with oxygen, increasing chest cavity space
- Exhalation: expelling air from the lungs, ridding them of carbon dioxide, decreasing chest cavity space
- Breathing rate: the number of breaths an organism takes per minute; varies depending on the activity
- During exercise, and physical activity, breathing rate tends to increase to supply more oxygen for cellular activity
- Organisms use different respiratory organs depending on their type and where they live, their environment
Respiration in Different Organisms
- Humans: breathe in air through their nostrils, air travels to the lungs via trachea; lungs contain air sacs (alveoli)
- Insects: respire using a network of tubes called tracheae, air enters spiracles
- Fish: respire using gills, absorbing dissolved oxygen from water
- Plants: respire, taking in oxygen through stomata on leaves or the roots
Additional Information
- Smoking damages lungs severely and can lead to cancer
- Oxygen is essential for life but can be toxic in high concentrations
- High altitude has lower air pressure, which can affect respiration processes
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Description
This quiz explores the process of respiration in living organisms, including the differences between aerobic and anaerobic respiration. Understand how oxygen plays a crucial role in energy production at the cellular level and why respiration is essential for all life forms.
