Breathing and Respiration in Living Organisms

Biology

This document explains the vital processes of breathing and respiration in living organisms. It differentiates between the two, details the organs used for gas exchange in various animals (earthworms, insects, fish, amphibians, and mammals), and describes the human respiratory system, including the path of air and the role of alveoli.

respiration breathing animal physiology

20 Questions Easy Ages 10+ Jan 26, 2026

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About this Study Set

This study set covers Biology through 20 practice questions. This document explains the vital processes of breathing and respiration in living organisms. It differentiates between the two, details the organs used for gas exchange in various animals (earthworms, insects, fish, amphibians, and mammals), and describes the human respiratory system, including the path of air and the role of alveoli. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 20 questions from the Breathing and Respiration in Living Organisms study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 What is the process of taking in oxygen-rich air into our body called?

A Exhalation
B Breathing
C Inhalation
D Respiration

2 What is the process of giving out air that has more carbon dioxide called?

A Inhalation
B Breathing
C Respiration
D Exhalation

3 Inhalation and exhalation are collectively called what?

A Respiration
B Breathing
C Gas Exchange
D Metabolism

4 What is respiration defined as?

A The process of taking in oxygen
B The process of releasing energy without breaking down food
C The process of using oxygen to break down food and release energy
D The exchange of gases with the environment

5 Why is respiration also called the universal chemical process?

A Because it only happens in plants
B Because it occurs in every living cell to survive
C Because it only involves the lungs
D Because it releases carbon dioxide

6 Which statement correctly describes respiration?

A It is an extracellular process and no energy is released.
B It is an intracellular process and energy is released.
C It is an extracellular process and energy is released.
D It is an intracellular process and no energy is released.

7 Which statement correctly describes breathing?

A It is an intracellular process and energy is released.
B It is an extracellular process and no energy is released.
C It is an intracellular process and no energy is released.
D It is an extracellular process and energy is released.

8 How do earthworms and leeches exchange gases?

A Through gills
B Through lungs
C Through air holes (spiracles)
D Through their skin

9 What are the small openings on the sides of an insect's body used for gas exchange called?

A Trachea
B Gills
C Spiracles
D Alveoli

10 What network of tubes carries oxygen to different parts of an insect's body?

A Spiracles
B Bronchioles
C Trachea
D Alveoli

11 How do fish get oxygen for respiration?

A They breathe air through lungs.
B They absorb oxygen dissolved in water through their skin.
C They absorb oxygen dissolved in water through their gills.
D They absorb oxygen from the air through spiracles.

12 What are the specialized structures in fish used for gas exchange called?

A Lungs
B Spiracles
C Trachea
D Gills

13 Frogs use their skin for gas exchange when they are in which environment?

A On land
B In the air
C In water
D In burrows

14 What is respiration through the lungs called?

A Buccal respiration
B Cutaneous respiration
C Pulmonary respiration
D Tracheal respiration

15 What is respiration through the skin called?

A Pulmonary respiration
B Buccal respiration
C Tracheal respiration
D Cutaneous respiration

16 Which type of respiration do frogs use when floating on water, involving the lining of the buccal cavity?

A Pulmonary respiration
B Cutaneous respiration
C Buccal respiration
D Tracheal respiration

17 In humans, what are the tiny air sacs at the end of bronchioles called?

A Bronchi
B Trachea
C Alveoli
D Nostrils

18 What is the cage-like structure formed by ribs that surrounds the lungs called?

A Buccal cavity
B Diaphragm
C Ribcage
D Nasal cavity

19 Which lung in humans is slightly smaller to accommodate the heart?

A The left lung
B The right lung
C Both lungs are the same size
D Neither lung is smaller

20 What is the function of alveoli in the lungs?

A To warm and filter air
B To transport air to the bronchioles
C To facilitate the exchange of gases
D To produce mucus

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