AQA Biology GCSE Exchange
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How does Active Transport differ from diffusion?
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It is the movement of molecules
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Takes place across a cell membrane
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Is used in the re-absorption of glucose by the kidney
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Uses ATP (energy)
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Is used by root hair cells to uptake mineral ions from the ground.
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A simple quiz for GCSE students studying B3 AQA BIology.
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- 2.
Where does gas exchange take place in a mammal?
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Lungs
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Trachea
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Alveoli
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Bronchi
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Bronchioles
Correct Answer
A. AlveoliExplanation
Gas exchange in mammals takes place in the alveoli. Alveoli are tiny air sacs located at the end of the bronchioles in the lungs. They have thin walls and a large surface area, allowing for efficient exchange of oxygen and carbon dioxide between the air and the bloodstream. Oxygen from the inhaled air diffuses into the bloodstream through the alveoli, while carbon dioxide, a waste product, is removed from the bloodstream and exhaled out of the body through the alveoli. Therefore, the correct answer is Alveoli.Rate this question:
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- 3.
How are the gill lamellae of a fish not adapted for gas exchange?
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Large surface area to volume ratio
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Moistened
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Rich Blood Supply
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Thin
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Fully Permeable
Correct Answer
A. Fully PermeableExplanation
The gill lamellae of a fish are fully permeable, meaning that they allow the passage of gases through them. This adaptation is essential for efficient gas exchange, as it allows oxygen to diffuse into the bloodstream and carbon dioxide to diffuse out. Without this permeability, gas exchange would be hindered, and the fish would not be able to obtain the oxygen it needs for respiration.Rate this question:
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- 4.
How does oxygen enter the body of a locust?
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Tracheoles
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Spiracles
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Lamellae
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Spirillium
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Trachea
Correct Answer
A. SpiraclesExplanation
Spiracles are small openings on the body of a locust that allow oxygen to enter the body. These openings are connected to a network of tubes called tracheae, which distribute the oxygen to different parts of the body. The spiracles can be opened and closed by the locust, allowing it to control the amount of oxygen it takes in. Therefore, the oxygen enters the body of a locust through the spiracles.Rate this question:
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- 5.
What actively helps ventilate our lungs?
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The trachea
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The diaphragm
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The nose
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The bronchi
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The pleural membranes
Correct Answer
A. The diaphragmExplanation
The diaphragm actively helps ventilate our lungs. It is a dome-shaped muscle located at the base of the lungs. When we inhale, the diaphragm contracts and moves downward, creating more space in the chest cavity. This allows the lungs to expand and fill with air. When we exhale, the diaphragm relaxes and moves upward, pushing the air out of the lungs. This process of contraction and relaxation of the diaphragm helps in the inhalation and exhalation of air, facilitating the ventilation of our lungs.Rate this question:
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- 6.
The surface area of the small intestine is increased by the presence of what?
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Cilia
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Flagella
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Villi
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Alveoli
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Hairs
Correct Answer
A. VilliExplanation
The surface area of the small intestine is increased by the presence of villi. Villi are finger-like projections that line the inner surface of the small intestine. These projections greatly increase the surface area available for absorption of nutrients from food. The increased surface area allows for more efficient absorption and digestion, as it provides a larger area for nutrients to be absorbed into the bloodstream.Rate this question:
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- 7.
Where does gas exchange take place in an insect?
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Tracheoles
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Alveoli
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Trachea
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Bronchioles
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Spiracles
Correct Answer
A. TracheolesExplanation
Gas exchange in insects takes place in the tracheoles. Tracheoles are tiny, thin-walled tubes that branch out from the larger trachea and deliver oxygen directly to the body tissues. They are located throughout the insect's body and provide a large surface area for efficient gas exchange. Oxygen diffuses from the tracheoles into the cells, while carbon dioxide produced by cellular respiration diffuses out of the cells and into the tracheoles to be expelled through the spiracles.Rate this question:
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- 8.
How could a fish improve the efficiency of gas exchange?
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Swim slower
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Reduce the blood supply to the gills
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Move more water over its' gills.
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Increase the thickness of the gill lamellae in the gill stack.
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Reduce the surface area of the gills
Correct Answer
A. Move more water over its' gills.Explanation
Moving more water over its gills would improve the efficiency of gas exchange in a fish. This is because the gills are responsible for extracting oxygen from the water and releasing carbon dioxide. By increasing the flow of water over the gills, more oxygen can be obtained and more carbon dioxide can be expelled, allowing for more efficient gas exchange.Rate this question:
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- 9.
What is the loss of water from a leaf?
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Transportation
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Translocation
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Transpiration
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Perspiration
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Transpitation
Correct Answer
A. TranspirationExplanation
Transpiration is the correct answer because it refers to the loss of water from a leaf through the stomata. Stomata are small openings on the surface of leaves that allow for the exchange of gases, but they also result in water vapor escaping from the leaf. This process is essential for the plant's survival as it helps to regulate temperature, transport nutrients, and maintain turgidity. Therefore, transpiration is the correct term to describe the loss of water from a leaf.Rate this question:
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- 10.
Many plants have leaves with a thick........................ to reduce water loss.
Correct Answer
Waxy cuticleExplanation
Plants have leaves with a thick waxy cuticle to reduce water loss. The waxy cuticle acts as a waterproof layer on the surface of the leaf, preventing excessive evaporation of water through the leaf surface. This adaptation helps plants to conserve water and maintain proper hydration, especially in dry or arid environments. The waxy cuticle also provides protection against harmful UV radiation, pathogens, and physical damage, making it an essential feature for plant survival.Rate this question:
- 11.
Where does gas exchange take place in a leaf?
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Spongy Mesophyll Layer
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Stomata
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Guard cells
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Palisade Layer
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Lower Epidermis
Correct Answer
A. Spongy Mesophyll LayerExplanation
Gas exchange takes place in the spongy mesophyll layer of a leaf. This layer is located towards the lower part of the leaf and consists of loosely packed cells with air spaces in between. These air spaces allow for the diffusion of gases, such as carbon dioxide and oxygen, between the leaf and the surrounding environment. The spongy mesophyll layer also contains chloroplasts, which are responsible for photosynthesis. Overall, the spongy mesophyll layer plays a crucial role in facilitating gas exchange and photosynthesis in the leaf.Rate this question:
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Mar 21, 2023Quiz Edited by
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Mar 14, 2009Quiz Created by
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