Respiration in Organisms
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Questions and Answers

Yeasts respire ______ and yield alcohol.

anaerobically

Muscle cramps occur when muscle cells respire ______.

anaerobically

The accumulation of lactic acid causes ______ cramps.

muscle

We get relief from cramps after a hot water bath or a ______.

<p>massage</p> Signup and view all the answers

The demand for energy is high during heavy ______.

<p>exercise</p> Signup and view all the answers

The supply of oxygen for energy production is ______ during intense exercise.

<p>limited</p> Signup and view all the answers

The complete breakdown of lactic acid results in ______ dioxide and water.

<p>carbon</p> Signup and view all the answers

You cannot survive for long without ______.

<p>breathing</p> Signup and view all the answers

An adult human being at rest breathes in and out ___ times in a minute.

<p>15-18</p> Signup and view all the answers

During heavy exercise, the breathing rate can increase up to ___ times per minute.

<p>25</p> Signup and view all the answers

The balloons in the model represent ______.

<p>lungs</p> Signup and view all the answers

When a person needs extra energy, he/she breathes ___ quickly.

<p>faster</p> Signup and view all the answers

The rubber sheet in the model represents ______.

<p>diaphragm</p> Signup and view all the answers

Boojho noticed that he had to breathe ___ after holding his breath for some time.

<p>heavily</p> Signup and view all the answers

Regular breathing exercises can help increase the lung's ______.

<p>capacity</p> Signup and view all the answers

We yawn when we feel ___ or drowsy.

<p>sleepy</p> Signup and view all the answers

Insects exchange gases through openings called ______.

<p>spiracles</p> Signup and view all the answers

As a result of fast breathing, more ___ is supplied to our cells.

<p>oxygen</p> Signup and view all the answers

The network of air tubes in insects for gas exchange is called ______.

<p>tracheae</p> Signup and view all the answers

Oxygen-rich air enters the body of insects through ______.

<p>spiracles</p> Signup and view all the answers

When we inhale air, it passes through our nostrils into the ___ cavity.

<p>nasal</p> Signup and view all the answers

The breakdown of food speeds up when more energy is ___ during physical activity.

<p>released</p> Signup and view all the answers

During respiration, carbon dioxide diffuses from the cells into the ______.

<p>tracheal tubes</p> Signup and view all the answers

Boojho is curious if animals like cockroaches have ______.

<p>lungs</p> Signup and view all the answers

Animals such as elephants, lions, cows, and goats have ______ in their chest cavities like human beings.

<p>lungs</p> Signup and view all the answers

Frogs can breathe through their lungs, but they can also breathe through their ______.

<p>skin</p> Signup and view all the answers

A cockroach has small openings on the sides of its body known as ______.

<p>spiracles</p> Signup and view all the answers

Earthworms breathe through their skin, which feels moist and ______ on touching.

<p>slimy</p> Signup and view all the answers

In plants, each part can independently take in ______ from the air.

<p>oxygen</p> Signup and view all the answers

Whales and dolphins often come up to the water surface to ______ air.

<p>breathe</p> Signup and view all the answers

The leaves of plants have tiny pores called ______ for the exchange of oxygen and carbon dioxide.

<p>stomata</p> Signup and view all the answers

In the cells, oxygen is used to break down glucose into ______ and water.

<p>carbon dioxide</p> Signup and view all the answers

In cockroaches, air enters the body through ______.

<p>spiracles</p> Signup and view all the answers

During heavy exercise, we get cramps in the legs due to the accumulation of ______.

<p>lactic acid</p> Signup and view all the answers

Normal range of breathing rate per minute in an average adult person at rest is ______.

<p>15–18</p> Signup and view all the answers

During exhalation, the ribs ______.

<p>move downwards</p> Signup and view all the answers

Yeast is associated with the production of ______.

<p>Alcohol</p> Signup and view all the answers

The ______ is a muscle that plays a crucial role in the process of breathing.

<p>Diaphragm</p> Signup and view all the answers

Frogs can breathe through their skin as well as their ______.

<p>lungs</p> Signup and view all the answers

Fish respire using ______.

<p>gills</p> Signup and view all the answers

Fish use ______ to breathe underwater.

<p>gills</p> Signup and view all the answers

Roots of plants take in ______ from the air spaces in the soil.

<p>oxygen</p> Signup and view all the answers

Plants also respire and take in ______ from the air.

<p>oxygen</p> Signup and view all the answers

______ is released as a byproduct of respiration.

<p>Carbon dioxide</p> Signup and view all the answers

The process of breaking down glucose to release energy is known as ______ respiration.

<p>cellular</p> Signup and view all the answers

If a potted plant is overwatered, it may not get enough ______ for respiration.

<p>oxygen</p> Signup and view all the answers

In humans, the ______ plays a vital role in breathing.

<p>diaphragm</p> Signup and view all the answers

Aquatic organisms exchange gases through ______ provided by their gills.

<p>blood vessels</p> Signup and view all the answers

Flashcards

Anaerobic Respiration

Energy production without oxygen, often in muscle cells during intense activity.

Lactic Acid

A chemical produced by anaerobic respiration in muscles, causing cramps.

Muscle Cramps

Painful contractions in muscles due to lactic acid buildup.

Why do we need to eat?

Food provides stored energy that our bodies release during respiration to power functions.

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Respiration

The process of breaking down food to release energy, both with and without oxygen.

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Yeast Respiration

Yeast cells produce alcohol during anaerobic respiration.

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How does hot water bath or massage help muscle cramps?

They improve blood circulation, delivering more oxygen to muscles and breaking down lactic acid.

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Why can't we hold our breath for long?

We need oxygen to survive. Our bodies need continuous intake of oxygen for proper functioning.

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Breathing rate

The number of breaths taken per minute.

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Heavy exercise

Any physical activity that increases your heart rate and breathing.

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Why do we breathe faster?

Our bodies need more oxygen to produce energy when we are physically active.

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What happens to breathing when we are tired?

Our breathing rate slows down when we are tired or drowsy because our body needs less oxygen.

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How does breathing work?

We inhale air through our nostrils, which passes through the nasal cavity.

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Why do we need oxygen?

Oxygen is essential for our cells to break down food and release energy.

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What is the effect of increased breathing rate?

Faster breathing delivers more oxygen to the cells, accelerating energy production from food.

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What is the relationship between breathing and energy?

The rate of breathing increases in proportion to our energy needs. Higher activity = faster breathing.

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Breathing in Water

How organisms living in water get oxygen.

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Gills

Specialized organs in aquatic animals that extract oxygen dissolved in water.

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Roots and Air

How plants get oxygen from the soil.

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Cellular Respiration

The process by which cells break down glucose to release energy.

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What do balloons represent?

The balloons in the breathing model represent the lungs. They expand when air is inhaled and contract when air is exhaled, just like real lungs.

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What does the rubber sheet represent?

The rubber sheet in the breathing model represents the diaphragm, a muscle that helps control breathing. It contracts and flattens when we inhale, and relaxes and bulges upwards when we exhale.

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What happens to lime water?

Lime water turns cloudy when exhaled air is blown into it, indicating the presence of carbon dioxide.

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Why does lime water turn cloudy?

Lime water reacts with carbon dioxide present in exhaled air. The reaction forms calcium carbonate, which is a white solid that makes the lime water appear cloudy.

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What do insects breathe through?

Insects breathe through tiny openings called spiracles. Oxygen enters through spiracles and travels through a network of tubes called tracheae.

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What are tracheae?

Tracheae are a network of air tubes in insects that connect spiracles to the body cells. Oxygen diffuses from the tracheae into the body cells.

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How does gas exchange occur in insects?

Oxygen enters the trachea through spiracles and diffuses into the body tissues. Carbon dioxide from the cells diffuses into the tracheae and exits through spiracles.

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Cockroach Breathing

Cockroaches breathe through tiny openings called spiracles. These openings allow air to enter their body for respiration.

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Heavy Exercise Cramps

During heavy exercise, muscles work harder and produce lactic acid without enough oxygen. Lactic acid buildup causes muscle cramps.

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Normal Breathing Rate

An average adult at rest breathes 15-18 times per minute. This is a healthy range for regular breathing.

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Exhalation and Ribs

When you exhale, your ribs move downwards, helping to push air out of your lungs.

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Yeast and Alcohol

Yeast is a type of fungus that can produce alcohol during fermentation, a type of anaerobic respiration.

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Diaphragm and Chest Cavity

The diaphragm is a muscle that helps control breathing. It separates the chest cavity from the abdomen.

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Fish Breathing

Fish breathe through gills, which extract oxygen from the water.

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Frog Respiration

Frogs can breathe through their lungs and their skin, which absorbs oxygen from their surroundings.

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How do insects breathe?

Insects have a system of tubes called tracheae that deliver oxygen directly to their cells. They take in air through small openings called spiracles.

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What's the difference between inhaled and exhaled air?

Inhaled air has a higher oxygen concentration (21%) and lower carbon dioxide concentration (0.04%) than exhaled air. Exhaled air has less oxygen (16.4%) and more carbon dioxide (4.4%).

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How do other animals breathe?

Many animals, like elephants, lions, birds, and frogs, have lungs. These are organs that exchange oxygen and carbon dioxide with the blood.

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How do earthworms breathe?

Earthworms breathe through their moist skin. Oxygen diffuses directly from the environment into their bodies.

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Can frogs breathe through their skin?

Yes, frogs, along with lungs, can also absorb oxygen through their moist skin, especially when underwater.

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What is the purpose of oxygen in respiration?

Oxygen is crucial for the process of cellular respiration. It's used to break down glucose, releasing energy for the body to use.

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How do plants obtain oxygen?

Plants take in oxygen through tiny pores called stomata on their leaves.

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Why do whales and dolphins surface?

Whales and dolphins are mammals that breathe air. They need to come to the surface to take in oxygen through their lungs.

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Study Notes

Respiration in Organisms

  • Organisms respire to obtain energy from food
  • Breathing involves taking in oxygen-rich air and releasing carbon dioxide-rich air
  • Cellular respiration is the process of breaking down food in cells to release energy
  • Aerobic respiration uses oxygen to break down glucose, releasing carbon dioxide and water
  • Anaerobic respiration occurs without oxygen, and breaks down glucose into other substances
  • Yeast respires anaerobically, producing alcohol and carbon dioxide
  • Muscle cells can respire anaerobically during intense exercise, producing lactic acid
  • Breathing rate varies depending on activity level and oxygen demand

Breathing Rate

  • Breathing rate is the number of breaths per minute
  • Breathing rate increases with physical activity
  • Breathing rate slows down at rest
  • Individuals have different normal breathing rates

Breathing Mechanism

  • Breathing involves inhalation (taking in air) and exhalation (releasing air)
  • Inhalation: Diaphragm contracts and ribs move upward and outward, expanding chest cavity
  • Exhalation: Diaphragm relaxes and ribs move downward and inward, reducing chest cavity
  • Air moves in and out because of changing size of the chest cavity

Structures and Processes in Different Organisms

  • Different organisms have different structures for gas exchange:
    • Insects have tracheae (tubes) for gas exchange
    • Fish use gills to absorb dissolved oxygen from water
    • Earthworms exchange gases through their skin
    • Plants exchange gases through stomata

Respiration in Water

  • Organisms in water have adaptations for respiration in aquatic environments
  • Fish use gills to extract dissolved oxygen from water
  • Some organisms can breathe air and water
  • Whales and dolphins surface to breathe air.

Respiration in Plants

  • Plants also respire to release energy from food using oxygen
  • Plants take in CO2 and release O2 during the day
  • Photosynthesis occurs during the day and helps plants produce foods
  • Respiration occurs at night or when there is no sunlight

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Respiration in Organisms PDF

Description

This quiz explores the processes of respiration in various organisms, including aerobic and anaerobic respiration. It also delves into breathing mechanisms and how breathing rates vary with activity levels. Test your understanding of how organisms obtain energy and the significance of respiration.

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