WorksheetsA Level Exchange between organisms & the environment
Total questions: 25
Worksheet time: 11mins
What happens when you breathe in? (tick all that apply)
diaphragm relaxes and moves up
diaphragm contracts and flattens
increases volume in thorax
reduces volume in thorax
pressure in thorax lower than outside
Name the structure through which gases enter and leave the body of an insect.
tracheoles
alveoli
spiracle
lungs
Name the small tubes that carry gases directly to and from the cells of an insect
tracheoles
system
spiracle
alveoli
Tubifex worms are small, thin animals that live in water. They have no specialised gas exchange or circulatory system. Name the process by which oxygen reaches the cells inside the body of a tubifex worm.
active transport
respiration
diffusion
facilitated diffusion
What adaptations does the alveoli have for efficient gas exchange?
thick walls
thin walls
small surface area
The diagram shows the structure of the human gas exchange system. Name organ P.
alveolus
trachea
bronchus
diaphragm
The diagram shows the structure of the human gas exchange system. Name organ Q.
alveolus
trachea
bronchus
diaphragm
Name the structure that protects fish gills from damage.
filaments
lamellae
operculum
gill arch
What is meant by a counter-current system?
A short distance for gases to diffuse
When water flows in an opposite direction to blood flow
having a higher concentration inside the lungs than outside
As the size of an organism increases its surface area to volume ratio increases
True
False
What is the exoskeleton of an insect made from?
cellulose
peptidoglycan
chitin
calcium
Which substance(s) can exit spiracles?
oxygen
carbon dioxide
glucose
water (vapour)
What is the site of gas exchange?
alveoli
bronchus
nose
trachea
Respiratory gases move in and out of the tracheal system in insects in many ways. Which of the following is correct?
Along a diffusion gradient
Mass Transport
The ends of the tracheoles are filled with water
All of the above
Gas exchange of respiratory substances occurs in single celled organisms by ...
Osmosis
Diffusion
Active Transport
All of the above
Insects have evolved adaptions to reduce water loss. Which of the following is correct?
Small surface area to volume ratio
Waterproof coverings
Spiracles
All of the above
Which gas exchange method is most efficient?
Parallel flow
Counter-current flow
As water temperature increases the % of dissolved oxygen ...
increases
decreases
stays the same
disappears
Recall why gills are pink in colour.
Due to blood in the capillaries
Due to oxygen reacting with the blood
Due to chlorophyll in the cells
Due to the countercurrent flow
