Lesson 3.3.2.1
3.3.2.1 Gas exchange surfaces and their adaptations Quiz: AQA Biology, Unit 3
20 questions
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Lesson 3.3.2.1, Gas exchange surfaces and their adaptations: 20 multiple choice questions for the AQA Biology (7402), Unit 3: Organisms exchange substances with their environment, written with Revision Ninja.
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The 20 questions
-
Why do single-celled organisms not require specialised gas exchange organs?
- Impermeable surface
- Low SA:V ratio
- Thick outer membrane
- High SA:V ratio
-
What is the main function of spiracles in insects?
- Pump blood around
- Prevent water entry
- Absorb nutrients
- Allow air entry
-
Which structures on fish gill filaments increase surface area for gas exchange?
- Gill arches
- Gill rakers
- Gill lamellae
- Opercular flaps
-
In fish gills, how do blood and water flow relative to each other?
- Perpendicular directions
- Alternating directions
- Opposite directions
- Same direction
-
Which pores on a leaf surface allow gases to enter and exit?
- Stomata
- Guard cells
- Lenticels
- Trichomes
-
What primary sacrifice occurs when terrestrial organisms increase gas exchange rates?
- Increased water loss
- Reduced carbon absorption
- Decreased oxygen intake
- Lower metabolic rate
-
Which xerophytic feature traps moist air around stomata to reduce water loss?
- Broad leaves
- Thin cuticle
- Epidermal hairs
- Large stomata
-
What structural feature of exchange surfaces minimises diffusion distance?
- Thin surface layer
- Thick epidermis
- Low capillary density
- Large total volume
-
Compared to fish B, why does fish A with double the gill filaments exchange gas faster?
- Steeper concentration gradient
- Greater surface area
- Higher blood pressure
- Shorter diffusion distance
-
Why do insect tracheoles deliver oxygen directly to tissues without blood?
- Short diffusion distance
- High blood pressure
- Low metabolic rate
- Impermeable body wall
-
Which feature of the spongy mesophyll layer increases surface area for gas exchange?
- Vascular bundles
- Tightly packed cells
- Air spaces
- Waxy cuticle
-
Why does a smaller single-celled organism have a higher gas exchange rate per unit volume?
- Higher SA:V ratio
- Slower metabolic rate
- Lower SA:V ratio
- Thicker cell wall
-
What is the sequence of structures air passes through in an insect?
- Tracheae, spiracles, tracheoles
- Spiracles, tracheae, tracheoles
- Tracheoles, tracheae, spiracles
- Spiracles, tracheoles, tracheae
-
What is the main advantage of having stomata located primarily on the lower leaf surface?
- Increased light absorption
- Increased oxygen uptake
- Faster sugar transport
- Reduced water loss
-
Which system maintains a steep concentration gradient along the entire length of fish gill lamellae?
- Concurrent flow
- Countercurrent flow
- Parallel flow
- Tidal ventilation
-
Which structures deliver oxygen directly to the respiratory tissues of insects?
- Bronchioles
- Gills
- Tracheoles
- Spiracles
-
What feature of gill lamellae provides a short diffusion distance for gas exchange?
- High blood pressure
- Thin capillary walls
- Thick epithelial layer
- Large blood volume
-
What is the primary physiological consequence of stomata closing in dry conditions?
- Higher transpiration rate
- Increased oxygen release
- Increased photosynthesis
- Reduced water loss
-
What is the main purpose of continuous water flow over a fish's gills?
- Increasing surface area
- Maintaining concentration gradients
- Reducing diffusion distance
- Lowering blood pressure
-
Which tissue layer in dicotyledonous leaves contains air spaces to increase gas diffusion?
- Upper epidermis
- Palisade mesophyll
- Waxy cuticle
- Spongy mesophyll
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