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AMU Entrance Respiration and Gas Exchange — practice questions

Explore 30 free Respiration and Gas Exchange questions in AMU Entrance Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Respiration and Gas Exchange questions and exercises with answers

Showing questions 1–30 of 30.

A biologist lists the main parts of the human breathing system: nasal cavity, lungs and:Read the answer and worked solution →As an animal gets bigger, its ratio of surface area to volume:Read the answer and worked solution →Direct diffusion through the body surface works only for organisms smaller than about:Read the answer and worked solution →A flatworm breathes through its outer membrane. Its flat shape helps by raising the:Read the answer and worked solution →Fish take dissolved oxygen from water using:Read the answer and worked solution →Gills are thin tissue filaments that are highly folded and:Read the answer and worked solution →Besides fish, gills are also found in crustaceans, annelids and:Read the answer and worked solution →Material moving from high concentration to low until equilibrium is reached is:Read the answer and worked solution →Insects carry oxygen through a network of small tubes called the:Read the answer and worked solution →The tubes of an insect's air system are made of a polymer called:Read the answer and worked solution →Air enters and leaves an insect body through openings called:Read the answer and worked solution →Besides bringing in oxygen, the nose warms, humidifies and removes:Read the answer and worked solution →Air travels from the pharynx through the voice box, also called the:Read the answer and worked solution →The trachea is lined with ciliated cells and mucus producing:Read the answer and worked solution →Rings in the wall of the trachea keep the passage open. They are made of:Read the answer and worked solution →Smooth muscle narrows the trachea so air rushes out hard. That helps us:Read the answer and worked solution →The muscular sheet below the lungs that drives breathing is the:Read the answer and worked solution →Gas exchange between lung and blood actually happens in the:Read the answer and worked solution →Each alveolar sac holds roughly how many alveoli?Read the answer and worked solution →The wall of an alveolus is typically how many cells thick?Read the answer and worked solution →A single human lung holds roughly how many alveoli?Read the answer and worked solution →The share of total pressure contributed by one gas in a mixture is its:Read the answer and worked solution →Catch the airway partsRead the answer and worked solution →Pop the gill ownersRead the answer and worked solution →Run the breathing gatesRead the answer and worked solution →Slice the breathing wordsRead the answer and worked solution →Insect or humanRead the answer and worked solution →Sort the breathing ideasRead the answer and worked solution →Type the numberRead the answer and worked solution →Respiration bingoRead the answer and worked solution →

Worked practice questions

A biologist lists the main parts of the human breathing system: nasal cavity, lungs and:

  1. Trachea
  2. Thalamus
  3. Thymus
  4. Tendon
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Correct answer: A. Trachea

1. Air must travel from nose to lungs. 2. One tube carries it down. 3. That tube is the trachea. _Source: OpenStax Biology 2e, Chapter 39, The Respiratory System._

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As an animal gets bigger, its ratio of surface area to volume:

  1. Dazzles
  2. Drops
  3. Doubles
  4. Dawdles
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Correct answer: B. Drops

1. Volume grows faster than surface. 2. So the ratio between them falls. 3. It drops as size increases. _Source: OpenStax Biology 2e, Chapter 39, The Respiratory System._

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Direct diffusion through the body surface works only for organisms smaller than about:

  1. 1 mm
  2. 1 m
  3. 1 km
  4. 1 dm
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Correct answer: A. 1 mm

1. Diffusion is slow over distance. 2. Only very tiny bodies can rely on it. 3. The limit is about 1 mm. _Source: OpenStax Biology 2e, Chapter 39, The Respiratory System._

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